Neurology

Question 1

What are the two functional classifications of the nervous system?

Answer 1

Afferent - sensory system (has somatic, visceral, and proprioceptive divisions)

Efferent - motor system (has somatic and visceral divisions)

Question 2

What is the neurotransmitter for the general somatic efferent nerves?

Answer 2

Acetylcholine

Question 3

Steps of neurotransmission for general somatic efferent nerves?

Answer 3

1. Action potential reaches terminal
2. Voltage gated Ca channels open
3. Synaptic vesicles fuse with terminal membrane
4. Acetylcholine released into synaptic cleft
5. Acetylcholine binds to receptors
6. Ligand-gated Na/K channels open —> end plate potential
7. Acetylcholinesterase degrades acetylcholine

Question 4

The general somatic efferent nerves include all cranial nerves EXCEPT

Answer 4

I and II

Question 5

What is the function of the general somatic afferent system?

Answer 5

Detect temperature, touch, nociception

Question 6

What is the function of the general proprioceptive system?

Answer 6

Detect position and movement in muscles and joints

Question 7

A lesion anywhere in a reflex arc will lead to __ reflexes.

Answer 7

Decreased

Question 8

A spinal cord lesion cranial to a reflex arc can lead to __ reflexes

Answer 8

increased