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Q1(a)What is the cranial nerve that serves as a conduit for the parasympathetic neurones that innervate the heart?

(b)Describe when during exercise you would expect the different divisions of the autonomic nervous system to be most active.

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Trinidad TremblayLv2
22 Jan 2019
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Related questions

1. The two major divisions of the nervous system are the CNS and the PNS.(T or F)

2. Action potentials normally travel along an axon in either direction depending on the needs of the animal.(T or F)

3. The axon of a nerve cell carries signals toward the part of the cell that houses the nucleus.(T or F)

4. When you are nervous you notice that your mouth is dry and your heart is racing. This is caused by the sympathetic division of your autonomic nervous system.(T or F)

5. The PNS consists of the somatic nervous system which controls smooth muscles etc. and the autonomic nervous system which sends messages to the skeletal muscles. (T or F)

6. When you do not have 20/20 vision and wear contact lenses or eye glasses, they work to improve your sight because they bend the light rays to correct your vision. (T or F)

7. All of the following are examples of a general category of sensory receptors: thermoreceptors, mechanoreceptors, electromagnetic receptors, chemoreceptors, and auditory receptors.(T or F)

8. If an animal is diurnal (active during the day) it probably has more cones in its eyes to distinguish more colors because its prey may have evolved to be camouflaged in the daylight.(T or F)

9. If you could not move the muscles in your eye, you would still expect that you could focus on different objects at different distances.(T or F)

10. If you had a pet spider and looked him lovingly in the eye you would see that he has a compound eye rather than a single lens like you would find in your own eye. (T or F)

Answer the following and provide a brief/short explanation of each:

A. Draw a simple diagram to show the neural circuit responsible for the observation that shining a light into your left eye results in constriction of the ipsilateral pupil. Be sure to include and label the following neurone types: interneurone, parasympathetic preganglionic neurone, parasympathetic postganglionic neurone, and sensory neurone.

B. If an axon had a conduction velocity of 115 m.sec-1, what 2 structural features would it have if it was viewed using a transmission electron microscope?

C. If an axon had a conduction velocity of 115 m.sec-1, how long would it take for an action potential to travel along this axon if it was 1520 mm long? Show working.

D. i) How many neurones are involved in a knee jerk reflex response at this monosynaptic reflex arc?

ii) Name the types of neurones involved at (i).

iii) What is the name of the specialised muscle fibre involved in detecting the muscle stretch? Hint: Only consider innervation associated with the quadriceps muscle and the major neurones involved in the process.

PLEASE HELP! THANK YOU

11. Luteinizing hormone stimulates cells in the testes to produce more testosterone.

Select one:

True

False

12. When a woman has completed menopause, she no longer menstruates or ovulates.

Select one:

True

False

13. A nerve is a bundle of axons from many different neurons.

Select one:

True

False

14. Sperm would have trouble surviving in a female reproductive tract without the prostate secretions because the female reproductive tract is too acidic for sperm.

Select one:

True

False

15. Breast-feeding decreases a woman's risk for breast cancer.

Select one:

True

False

16. When you are reading a book and relaxing, your parasympathetic nervous system is more active than your sympathetic nervous system.

Select one:

True

False

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