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B5: Quiz 2
B5: Quiz 2
1)
a)
i) What is the role of receptors in the body?
ii) Give 2 examples of receptors in the body.
b)
i) What does CNS stand for?
ii) What makes up the CNS?
iii) What does the CNS do?
c) Place the words coordination, response, receptor, stimulus and effector in order to show how responses are brought about in the body.
d) There are two different types of effectors. What are these two different types of effectors and how do each of the effectors respond?
2) A ball is travelling towards an individual’s head. Electrical impulses are sent along a reflex arc to cause the individual to contract some muscles to bring his hands in front of his face.
a) What is the stimulus for this?
b) Where does the coordination happen?
c) What is the response?
3) The eye has a reflex arc that controls how much light enters the eye. It is controlled by receptors that monitor light levels. The size of the pupil then changes according to the level of light.
a) Why do we need to control how much light enters the eye?
b) For this reflex arc, what are the following:
i) the stimulus
ii) the coordinator
iii) the response
4)
a) Give the names of the three different neurones?
b) Place the three neurones in your answer to part a in the order that the electrical impulses travel through from a stimulus to a response.
c) The diagram below shows the connection between two neurones. The electrical impulses are going from left to right on the diagram below.
a)
i) What is the role of receptors in the body?
ii) Give 2 examples of receptors in the body.
b)
i) What does CNS stand for?
ii) What makes up the CNS?
iii) What does the CNS do?
c) Place the words coordination, response, receptor, stimulus and effector in order to show how responses are brought about in the body.
d) There are two different types of effectors. What are these two different types of effectors and how do each of the effectors respond?
2) A ball is travelling towards an individual’s head. Electrical impulses are sent along a reflex arc to cause the individual to contract some muscles to bring his hands in front of his face.
a) What is the stimulus for this?
b) Where does the coordination happen?
c) What is the response?
3) The eye has a reflex arc that controls how much light enters the eye. It is controlled by receptors that monitor light levels. The size of the pupil then changes according to the level of light.
a) Why do we need to control how much light enters the eye?
b) For this reflex arc, what are the following:
i) the stimulus
ii) the coordinator
iii) the response
4)
a) Give the names of the three different neurones?
b) Place the three neurones in your answer to part a in the order that the electrical impulses travel through from a stimulus to a response.
c) The diagram below shows the connection between two neurones. The electrical impulses are going from left to right on the diagram below.
i) What is the name of the connection between two neurones?
ii) Explain how messages are sent across the gap between the two neurones.
5)
a) Is the reflex arc/ reflex action conscious or unconscious? Explain how it being conscious or unconscious is beneficial for humans.
We are now going to have a look at the reflex arc/ reflex action that occurs when an individual touches a hot hob, which results in them pulling their hand away from the hot hob. A diagram of the reflex arc is shown below.
ii) Explain how messages are sent across the gap between the two neurones.
5)
a) Is the reflex arc/ reflex action conscious or unconscious? Explain how it being conscious or unconscious is beneficial for humans.
We are now going to have a look at the reflex arc/ reflex action that occurs when an individual touches a hot hob, which results in them pulling their hand away from the hot hob. A diagram of the reflex arc is shown below.
b) For the above reflex arc, what are the following:
i) the stimulus
ii) the coordinator
iii) the effector
c) For the above reflex arc, what is the name of the neurones labelled A, B and C?
6) Place the words below in order from what happens in a reflex arc.
CNS (relay neurone), sensory neurone, stimulus, response, effector, receptor, motor neurone
7) Some painkillers work by preventing chemicals (neurotransmitters) binding to the receptors in synapses. Explain how this reduces the pain felt by an individual.
i) the stimulus
ii) the coordinator
iii) the effector
c) For the above reflex arc, what is the name of the neurones labelled A, B and C?
6) Place the words below in order from what happens in a reflex arc.
CNS (relay neurone), sensory neurone, stimulus, response, effector, receptor, motor neurone
7) Some painkillers work by preventing chemicals (neurotransmitters) binding to the receptors in synapses. Explain how this reduces the pain felt by an individual.