Lab Practical Chapter 20: Reflexes

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1
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In your diagram above, how many synapses of the reflex arc are found in the CNS?

Is the reflex monosynaptic or polysynaptic

There should be two synapses in the CNS

the reflex is polysynaptic

2
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if the motor neuron in the diagram is a somatic motor neuron, what must the effector be

skeletal muscle

3

Which of the following terms apply to the patellar reflex? (Circle the ones that apply.)

monosynaptic or polysynaptic cranial or

spinal somatic or autonomic

ipsilateral or contralateral

monosynaptic

spinal

somatic

ipsilateral

4

Can you consciously control your quadriceps muscles?

yes

5

Do you consciously control your quadriceps muscles during the patellar reflex

no

6

What happened to the response when the seated person was naming bones?

There should have been a stronger response (a more pronounced kick). this may or may not have actually been observed.

7

The brain may send inhibitory signals to the neurons involved in a reflex. Distracting the brain with a task like naming bones may remove the┼če inhibitory signals. Given this information, what should happen to the response when the seated person is naming bones?

If inhibitory signals are removed, then there should be a stronger response

8

Which of the following terms apply to the withdrawal reflex?

polysynaptic

somatic

spinal

ipsilateral

9

Which of the following terms apply to the crossed-extensor reflex?

polysynaptic

somatic

spinal

contralateral

10

Can you consciously control the diameter of your pupils?

no

11

Which of the following terms apply to the pupillary reflex?

polysynaptic, autonomic, cranial, and ipsilateral and contralateral responses both occur

12

Can you identify another autonomic reflex? (Hint: Think of food.)

salivating in response to the smell of food, another is contractions of smooth muscle of the esophagus during swallowing

13
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How many neurons are in a monosynaptic reflex?

2

14
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Is this reflex monosynaptic or polysynaptic?

polysynaptic

15
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Is this reflex ipsilateral or contralateral?

ipsilateral

16
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Is this a spinal reflex or a cranial reflex?

spinal

17
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Is this reflex autonomic or somatic?

somatic

18
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How many multipolar neurons are found in this reflex?

2

19
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How many unipolar neurons are involved in this reflex?

1

20
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Name the reflex being tested.

patellar reflex

21
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Is this reflex monosynaptic or polysynaptic?

monosynaptic

22
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Is this reflex ipsilateral or contralateral?

ipsilateral

23
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Is this a spinal reflex or a cranial reflex?

spinal

24
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Is this reflex autonomic or somatic?

somatic

25

If a penlight is shined into an individual's left eye, then the diameter of his left pupil will...

decrease

26

Is the pupillary reflex monosynaptic or polysynaptic?

polysynaptic

27

Is the pupillary reflex a spinal reflex or a cranial reflex?

cranial

28

Is the pupillary reflex autonomic or somatic?

autonomic