In relation to animal responses:
1 - Leaving Cert Biology - Question ii - 2012
Question ii
In relation to animal responses:
1. Name the two main parts of the central nervous system in humans.
2. Messages are carried around the body by neurons (nerve cells)... show full transcript
Worked Solution & Example Answer:In relation to animal responses:
1 - Leaving Cert Biology - Question ii - 2012
Step 1
Name the two main parts of the central nervous system in humans.
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Answer
The two main parts of the central nervous system (CNS) in humans are the brain and the spinal cord.
Step 2
Messages are carried around the body by neurons (nerve cells). Name any two types of neuron.
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Answer
Two types of neurons are sensory neurons and motor neurons. Sensory neurons carry signals from sensory receptors to the central nervous system, while motor neurons transmit signals from the CNS to effectors such as muscles.
Step 3
What name is given to the area where one neuron ends and another begins?
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The area where one neuron ends and another begins is called a synapse.
Step 4
Name the type of chemical that carries messages between two neurons.
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Answer
The type of chemical that carries messages between two neurons is called a neurotransmitter.
Step 5
What happens to this chemical once the messages have been transmitted?
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Once the messages have been transmitted, the neurotransmitter is typically broken down by enzymes or taken back up by the presynaptic neuron in a process known as reuptake.
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