Motor neurons are cells that carry information from the central nervous system to the muscles and glands, while sensory neurons send signals from body parts to the central nervous system. Sensory neurons are found over the body, such as in the skin, ears, eyes, nose and tongue. Interneurons in the central nervous system allow information to flow between motor and sensory neurons.
he cell body of a neuron holds a nucleus and organelles that carry out basic cell functions, such as protein synthesis, transporting materials and producing energy. A neuron also has special parts that allow information to move. Dendrites are branch-like structures that receive signals. The axon, which often resembles a long tail, takes messages away from the cell. The axon ends in a terminal containing a chemical called a neurotransmitter, which allows the signal to move across the space between the cell that sends information and the cell that receives it. When axons and dendrites of different cells are bunched together, they create nerves. Ganglia are groupings of many neurons' cell bodies.
The processes conducted by nerve cells happen incredibly fast, in thousandths of a second. That is why the human body reacts so quickly to stimuli in the environment. A hand touching a hot stove is removed almost immediately so that serious injury does not occur.
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Answer:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.
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Answer:
There is a 25% probability that their child will have Tay-Sachs disease.
Explanation:
We know that:
People that are homozygous for the Tay-Sachs allele die, that means that the two copies of that allele are affected.
The members of the couple are both carriers, which means that they are both heterozygous for the Tay-Sachs allele, so they did not die because only one copy of the allele's pair is affected.
If we make a Punnet square where A stands for the affected allele and a for the normal one, we can see that both members of the couple are Aa and that there is only a 25% of probability that their child will have Tay-Sachs disease, as well as a 50% chance of being a carrier.
<u>║ A ║ a</u>
<u>A ║ AA ║Aa</u>
<u>a ║ aA║aa </u>
<u />
Answer:
Im going to say cartilage as my answer.
hope this helps
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