The process of muscle relaxation begins when signaling from the motor neuron stops. This event causes repolarization of the sarcolemma and T-tubules and closes the voltage-gated calcium channels in the sarcoplasmic reticulum (SR). As a result, Ca+ ions are then pumped back into the SR, which causes the tropomyosin to re-cover the binding sites on the actin strands.
When the amount of ATP runs out, the muscle also relaxes.
Answer:
The muscles exhibit the tendency to relax by a procedure known as relaxation.
Explanation:
After the stimulation of nerve takes place, the process is known as relaxation occurs. The association between the actin and myosin gets dissociated when the pumping of calcium takes place back into the sarcoplasmic reticulum. As the actin and myosin return back to their unbounded condition the relaxation of muscles takes place.
Unfortunately, you go a bit overboard and feel a sudden pinch, after which you notice you are bleeding. What has happened? Are you still in the epidermis? Explain.
If you go a bit overboard and feel a sudden pinch and you start bleeding, It means that something penetrate in your skin and torn off your blood vessel so that you start bleeding.
May be there was any pin or sharp needle thing was there in board that pinch into your skin and your epidermis could not resist that and it is no longer intact and you created a wound on your skin.
Epidermis the surface epithelium of the skin of an animal, overlying the dermis. and in this case it is wounded by that pin.
Answer:
You have gotten to a deeper level of the epidermis called the Stratum Basale. This is where there is an active blood supply and pain receptors.
You are still in the epidermis just at the deepest level.
Explanation:
The city council is planning to construct a new wastewater treatment plant to regulate the amount of pollution currently seeping into the city’s lakes and streams. They plan to build the new treatment plant on the outskirts of the city by clearing a sizable piece of land in a forested area. How will both of these steps impact the city in the long run?
A.
Because of the urban heat island effect, less heat will be absorbed and regional temperatures will be slightly higher.
B.
The wastewater treatment plant will solve the city’s air pollution problems.
C.
The new plant will guarantee that the city’s drinking water will always be free from harmful pathogens.
D.
Water pollution will decrease, but the number of rock falls in the area will increase.
Both of these steps will impact the city in the long run as the urban heat island effect, less heat will be absorbed and regional temperatures will be slightly higher. The correct option is A.
What is wastewater treatment?The primary goal of the wastewater treatment system is to eliminate as many suspended solids as possible before returning the remaining water, known as effluent, to the environment.
As solid matter decays, it consumes oxygen, which is required by the plants and animals that live in the water.
Both of the given actions will have a long-term impact on the city because, due to the urban heat island effect, less heat will be absorbed and regional temperatures will be slightly higher.
Thus, A is the correct answer.
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What determines how much energy a human can receive from food?
A) How much nitrogen the food contains
B) How much the food molecules weigh
C) How much energy the food molecules have
D) How much oxygen the food contains
How much energy the food molecules have is the correct answer.
The presence of molecules determines amount of energy a human can receive from food. Food molecules have macromolecules such as carbohydrate, protein and fat which release energy when broken down into simpler molecules with the help of enzymes. The food we eat has these macromolecules which is used as a fuel for running the body so we can conclude that food molecules have energy.
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What effect will the addition of animal waste and decayed plant matter have on the soil and land?
The addition of animal waste and decayed plant matter would serve as manure on land and soil.
The general effect of these additions are the fact that the soil would get to become thicker and also more nourishing. This would yield into more and better growth of plants.
When these wastes start to decay and decompose, they help the soil by adding nitrogen to the ground. This nitrogen is what helps in the growth of plants.
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What type of cell contains DNA enclosed in a nucleus?
4. What most likely caused the rabbit population to decrease over the first time unit shown in the following graph?
A. A disease in the population of rabbits.
B. A decreasing population of grasses.
C. An increasing population of hawks.
D. A higher than normal population of snakes.
The correct answer is option D
The population of rabbit over the first unit of time is reduced because the population of snakes was more than the normal population.
The predators of rabbits are snakes and if the population of predator will be more than the population of the rabbit then snakes will eat them. Ultimately the population of rabbit will be decreased.
Then after some time the population of rabbit increased as the population of snakes decreased.
The rabbit population to decrease because A higher than normal population of snakes. Option D
Why did the population decrease?Due to the fact that there were more snakes than usual during the first unit of time, the rabbit population decreased.
Snakes are the rabbits' main predators, and if there are more snakes than there are rabbits, the snakes will consume the rabbits. The rabbit population will eventually decline. Following that, as the population of snakes declined, the population of rabbit rose.
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How can you tell from a dot diagram how many covalent bonds can be formed in an element?
A: By the number of protons in the dot diagram
B: By the number of valence electrons in the dot diagram
C: By the number of neutrons in the dot diagram
D: You can not tell the number of covalent bonds from a dot diagram.
the answer is B by the number of valence electrons.
HELP ME PLEASE!!!!!
If the dominant allele is represented by A and the recessive allele is represented by a what would be a possible genotype and phenotype of individual II.3
The correct answer is option B. Genotype AA, phenotype-Unaffected.
The cystic fibrosis is a condition caused by the inheritance of the two recessive allele, It is an autosomal recessive disease.
In the given case, the parents are carriers, and the carriers are always heterozygotes. Hence, the phenotype of the both parent should be Aa. A possible cross of the parents is shown in the figure below.
In case, the progeny have a single dominant trait, the child would not be affected, but will be a carrier and can pass the disease to offspring. In case, the child inherit both the dominant allele (homozygous dominant) from the parents, then he/she would be unaffected. In case, the phenotype of the child is homozygous recessive then it would be affected.
The possible genotype and phenotype of individual is Genotype AA, phenotype-Unaffected. Hence the correct option is b.
The cystic fibrosis is a condition caused by the inheritance of the two recessive allele, It is an autosomal recessive disease.
In the given case, the parents are carriers, and the carriers are always heterozygotes. Hence, the phenotype of the both parent should be Aa. A possible cross of the parents is shown in the figure below.
In case, the progeny have a single dominant trait, the child would not be affected, but will be a carrier and can pass the disease to offspring. In case, the child inherit both the dominant allele (homozygous dominant) from the parents, then he/she would be unaffected. In case, the phenotype of the child is homozygous recessive then it would be affected. Hence the correct option is b.
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Which object was developed to help astronomers learn more about the Sun?
Spectroscopy is what i found to be true.
Answer: A. Parker Probe
Explanation:
A landfill which a plastic or clay liner that prevents the leaking of waste into soil and groundwater is called?
a) a sanitary landfill
B) an unsanitary landfill
C) a recycling center
D) a toxic waste site
An "organism" is considered the highest level of organization of cells, yet it is also found at the lowest level of cellular organization. True False
An "organism" is considered the highest level of organization of cells, yet it is also found at the lowest level of cellular organization. True False
the answer is true
HELP ASAP PLEASE!!!! WILL MARK BRAINLIEST
A ______ is a prediction based on data and information you researched.
The answer is a hypothesis.
A hypothesis is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories.
How would gene expression be affected if there was an error in translation(reading instructions)?
Gene expression is about making mRNA which is then translated into a protein. If the mRNA that was expressed is mis-read it may or may not have an affect on gene expression. It will have a negative effect if:
1. The protein produced is required for gene expression (e.g. the DNA polymerase)
2. The protein produced is another critical protein that the cell cannot live without.
3. If the question is more about constantly misreading during translation, eventually the cell would die because the wrong proteins would be made (or not made at all).
Which feature is not used to classify a virus?
Question 4 options:
genetic material
size
shape of the capsid
shape of its nucleus
Answer:
shape of nucleus
Explanation:
usa test prep
I need help with these two questions.
21 food and oxygen
22 H
high-intensity bundle of energy being emitted from some decaying nuclei beta particle 2. particle radiating from the nucleus of some atoms alpha particle 3. negative particle identical to an electron but radiating from a decaying nucleus gamma ray
Alpha particles, beta particles, and gamma rays are the three most general kinds of radiation discharged by radioactive or unstable isotopes. Gamma rays refer to the high-intensity bundle of energy being emitted from certain decaying nuclei.
Beta particles refer to the negative particle similar to an electron but radiating from a decaying nucleus.
Alpha particles refer to the particles radiating from the nucleus of certain atoms similar to a nucleus of a helium.
How do somatic and inherited mutations differ?
A. Somatic mutations exist in all cells in the body and inherited mutations only exist in the cell type that mutated.
B. Somatic mutations only affect males and inherited mutations affect any gender.
C. Inherited mutations exist in all cells in the body and somatic mutations only exist in the cell type that mutated.
D. Inherited mutations only affect males and somatic mutations affect any gender.
The right option is; C. Inherited mutations exist in all cells in the body and somatic mutations only exist in the cell type that mutated.
Inherited mutations are gene mutations that exist in almost every cell in the body throughout an individual’s life. Inherited mutations are inherited from a parent and can also be transmitted. They are also called germline mutations because they exist in the parent’s egg or sperm cells (gametes).
Somatic mutations are gene mutations that exist in only certain cell types that are mutated, not in every cell in the body and it take place at some time during an individual’s life. Somatic mutations are not inherited and cannot be passed. They are caused due to environmental factors (such as cigarette smoke or ultraviolet (UV) radiation) or due to error during DNA replication.
Answer:
A for plato
Explanation:
1. Any molecule that contains carbon to hydrogen bonding is known as a
A) water
B) inorganic molecule
C) organic molecule
2. How many valance electrons are generally needed to fill the outer shell of most atoms?
A) 4
B) 6
C) 8
3. The macromolecules in biochemistry are proteins, carbohydrates, lipids and nucleic acids. What main elements do all of them have in common?
A) carbon and sulfur
B) carbon and hydrogen
C) oxygen and nitrogen
D) oxygen and phosphorus
1.) C) organic molecule
2). B) 6
3) B) carbon and hydrogen
Organic molecules are compounds containing carbon-hydrogen bonds; most atoms require 8 valance electrons to complete their outer shells; proteins, carbohydrates, lipids, and nucleic acids all contain elements of carbon and hydrogen.
Explanation:1. Any molecule that contains carbon to hydrogen bonding is known as a C) organic molecule. Organic molecules are those which contain carbon atoms covalently bonded to hydrogen atoms. Examples of organic molecules include methane (CH4), glucose (C6H12O6), and many more.
2. The number of valance electrons generally needed to fill the outer shell of most atoms is C) 8. This principle is known as the octet rule, and it is based on the observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.
3. The main elements that all of the macromolecules in biochemistry (proteins, carbohydrates, lipids and nucleic acids) have in common are B) carbon and hydrogen. All these macromolecules are made up of these two elements along with others specific to each type of molecule. For example, proteins also contain nitrogen, oxygen and sometimes sulfur; carbohydrates and lipids additionally contain oxygen; and nucleic acids also contain nitrogen, oxygen, and phosphorus.
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_____ are amphibians that most closely resembles early tetrapod in the body form. A. Frogs B. Snakes C. Salamanders D. Toads
Final answer:
Salamanders are amphibians that most closely resemble early tetrapods in body form. They have a long body with short legs and a tail, similar to early tetrapods. Salamanders are adapted for walking and swimming, and their gait is thought to be similar to that of early tetrapod's.
Explanation:
Salamanders are amphibians that most closely resemble early tetrapods in body form. They have a long body with short legs and a tail, similar to early tetrapod's. Salamanders are adapted for walking and swimming, and their gait is thought to be similar to that of early tetrapod's. Unlike frogs and toads, salamanders keep their tails as adults and have moist, smooth skin.
The correct answer is C. Salamanders are amphibians that most closely resembles early tetrapod in the body form.
Salamanders are amphibians that most closely resemble early tetrapods in body form. They have a lizard-like appearance with a long tail and four limbs, which is similar to the fossil record of early tetrapods that transitioned from aquatic to terrestrial environments during the Devonian period. Frogs, snakes, and toads have evolved more specialized body forms that are less similar to these early tetrapods. Frogs have a more specialized jumping form, snakes have lost their limbs, and toads, while similar to frogs, have dry, warty skin and shorter legs. Salamanders, on the other hand, retain many of the primitive characteristics of the first vertebrates to walk on land.
To help keep garbage out of landfills, individuals can _____. use fewer consumable items recycle use refillable water bottles all of the above
That should be all of the above
Hope this helps :)
Answer:
all of the above
Explanation:
Landfill is where solid waste generated by city dwellers is destined. This space is composed of domestic, commercial, industrial, construction waste and also from waste generated in sewage. Landfill is a kind of deposit where solid waste from homes, industries, hospitals and buildings is discarded. Much of this waste is made up of non-recyclable materials, as we all know, non-recyclable waste causes serious problems in nature, so it is important that people reduce the amount of waste in landfills.
To help reduce landfill, people can use fewer consumables, recycle and use refillable water bottles.
The junction between the adjoining neurons where the axon bulb of one neuron comes in proximity with specialized receptor sites on another neuron is called the ____.
Synapses are known as the junction between the two adjoining neurons. The nerve impulses are passed through this gap with the help of the neurotransmitters. In a synapse, the axon of one neuron is present in proximity with the receptor of another neuron. The synapse between the two adjacent neurons helps them to communicate with each other.
Hence, the blank can be filled with 'synapse'.
The correct answer is B. A synapse is the junction between neurons or between a neuron and another cell type. It functions to transmit signals and involves complex interactions of neurotransmitters aiding in cellular communication.
The correct term for the junction between adjoining neurons where the axon bulb of one neuron comes in proximity with specialized receptor sites on another neuron is the synapse. Let's break down why this option is correct:
Definition: A synapse is the point where the axon terminal of one neuron comes near the dendrite or cell body of another neuron, or even a muscle cell (neuromuscular junction).Function: It facilitates the transmission of electrical or chemical signals between neurons or between a neuron and another cell type.Mechanism: When an action potential reaches the axon terminals, it causes the release of neurotransmitters from synaptic vesicles into the synaptic cleft.Types of Synapses: There are two types of synapses: chemical and electrical. Most common are chemical synapses where neurotransmitters are released to carry the signal across the synaptic cleft.Complexity: The structure and function of a synapse ensure precise communication between cells, a critical aspect of neural functioning.Thus, Option B, a synapse, is the correct answer.
Complete question:
The junction between the adjoining neurons where the axon bulb of one neuron comes in proximity with specialized receptor sites on another neuron is called the?
A. Junction point
B. A synapse
C. A joint
D. Constant bridge
True or false? resource use per person is higher in the united states than it is in middle-income countries like china.
The distance between Neptune and the Sun is 30.06 AU. What is this distance in millions of kilometers? (One AU is about 150 million kilometers.)
A.
450 million kilometers
B.
450.9 million kilometers
C.
4,000 million kilometers
D.
4,509 million kilometers
Answer:
4,509 million kilometers
Explanation:
How would an asthma attack most likely affect oxygen delivery in the body?
Answer: Asthma is a chronic inflammatory disease of airways(nasal cavity,trachea , bronchiole). The disease manifests as recurrent attacks of wheezing, coughing and shortness of breath. The muscles surrounding the airways restricts the passage and there is a limiting amount of air supply to the body causing a choking sensation.As there is a natural defence mechanism in our body asthma induce the secretion of sputum and mucus, that leads to constrict the airways , making the asthma attack worse.
As a result of loss of oxygen there is a condition called hypoxia and because of this there could be some serious issues related to the body depending upon the time interval of asthma .These can be
Confusion Cough Fast heart rate Rapid breathing Shortness of breath Slow heart rate Sweating WheezingWhat do you think would happen if you added a large volume of fresh water to the roots of the plant? answer in terms of osmosis and salt and water concentration. Would water move into the plant, out of the plant, or stay where it is? explain why.
Which phrases describe organisms that formed index fossils? Check all that apply.
are extinct
had hard parts
were generally large
were alive only for a short time
lived in a narrow geographic area
are extinct
were alive only for a short time
lived in a narrow geographic area
had hard parts
Answer:
Options (1), (2), and (4)
Explanation:
Index fossils are usually defined as those fossils that were present on earth for a very short period of time. They were very broadly distributed in almost all parts of the world. They were comparatively smaller in size and comprised of hard parts that were preserved under favorable conditions which are found at many places in the present. These are extinct species. For example, trilobites and ammonites.
These index fossils are very useful because it helps in determining the age of the fossils as well as rocks by applying the radioactive dating method.
thus, the correct answers are options (1), (2), and (4).
After a dye diffuses uniformly throughout a glass of water, the dye molecules are no longer moving. True or false?
Final answer:
The statement is false; dye molecules continue to move randomly even after diffusing evenly throughout the water due to constant kinetic energy.
Explanation:
The statement that 'after a dye diffuses uniformly throughout a glass of water, the dye molecules are no longer moving' is false. Diffusion is the process by which molecules move from an area of high concentration to an area of lower concentration. When you place a drop of dye into water, it will diffuse until there is an even distribution throughout the water. This state is known as equilibrium, where there is no net movement of dye molecules, but the individual dye molecules continue to move randomly. It's important to note that molecular motion is constant due to kinetic energy, so even when the dye has spread out evenly, the molecules are still in motion.
What is the difference between child abuse and child neglect?
Child abuse is hurting a child in a physical, emotional or sexual manner.
Child neglect is when a child is being neglected through, not having love and attention, education and nutrition, etc.
Answer:
Child abuse is hurting a child in a physical, emotional or sexual manner.
Child neglect is when a child is being neglected through, not having love and attention, education and nutrition, etc.
Explanation:
Correct for Plato
In some protists genetic information is transferred from one cell too the next this transfer is called
In some protists, genetic information is transferred from one cell to the next. This transfer is called _____. A. external fertilization.
If the same base pairs are use to code for all organisms why is there so much variation among organisms
Because same base pairs are arranged differently among organisms due to which there are so much variations in organisms.
Explanation:Variation in the organism is due to the genes.Every one have different DNA/genes which describes one's features.Genes are various arrangements of these four base pairs.So same base pairs with different pattern arrangement causes variation among organism.
Answer:
The order of the codons differs between organisms.
Explanation:
The four nitrogenous bases, guanine, thymine, adenine, cytosine (and uracil in RNA) are present in all living beings, forming pairs that are able to define our genetic characteristics. Nitrogen bases can have 64 different combinations, so there are 64 different codons. Of these codons, 61 will encode the 20 different types of amino acids in existence. The order that these bases are and the order that each codon is within the DNA is the factor that determines why there is so much variability among living things.