The nervous system and the endocrine system both play a role in human responses - Leaving Cert Biology - Question 13 - 2017
Question 13
The nervous system and the endocrine system both play a role in human responses.
(i) Name the chemicals that act as messengers in the endocrine system.
(ii) The ce... show full transcript
Worked Solution & Example Answer:The nervous system and the endocrine system both play a role in human responses - Leaving Cert Biology - Question 13 - 2017
Step 1
(i) Name the neurons labelled A, B, C.
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Answer
A = Sensory, B = Inter (or relay), C = Motor
Step 2
(ii) Is the impulse transmitted from A to B to C OR from C to B to A?
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Answer
The impulse is transmitted from A to B to C.
Step 3
(iii) Give one example of a reflex action in humans.
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An example of a reflex action in humans is blinking or the knee jerk response.
Step 4
(iv) Why are reflex actions important to humans?
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Reflex actions are important for protection as they allow for quick responses to potentially harmful stimuli.
Step 5
(v) What name is given to the gaps between neurons?
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The gaps between neurons are called synapses.
Step 6
(vi) Neurotransmitters are released into the gaps between the neurons. Why does this occur?
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Neurotransmitters are released to carry the impulse from one neuron to the next.
Step 7
(vii) What happens to neurotransmitters once they have carried out their function?
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Once neurotransmitters have carried out their function, they are broken down or recycled.
Step 8
(i) Name the parts labelled A, B, C.
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A = Cerebrum, B = Medulla (oblongata), C = Cerebellum
Step 9
(ii) Give one function of the part labelled B.
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The function of B is to control breathing, swallowing, and involuntary muscles such as heartbeat.
Step 10
(iii) What are the two main structures that protect the brain?
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The two main structures that protect the brain are the skull and the meninges.
Step 11
(iv) The hypothalamus in the brain plays a role in homeostasis.
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The hypothalamus helps regulate various bodily functions such as temperature and hunger.
Step 12
(v) What is meant by the term homeostasis?
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Homeostasis refers to maintaining a constant internal environment in the body.
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