20a. During electrotonic, or decremental conduction, the distance covered by an

Question

20a. During electrotonic, or decremental conduction, the distance covered by an ionic current will be affected by all of the following factors EXCEPT _____________.

a. the amplitude of the original current

b. the resistance of neuronal membrane

c. the frequency of action potetntial generation

d. the conductivity of the intracellular and extracellular fluid

20b. Which of the following is NOT part of the peripheral nervous system?

a. autonomic nerves

b. parasympathetic nerves

c. sensory receptors

d. spinal cord

Explanation / Answer

20a - Option (c)

Frequency of action potential generation will not affect the distance covered by an ionic current. It represents only the number of times potential is generated in one cycle.

20b - Option (d)

Spinal cord is a part of central nervous system and not the peripheral nervous system. The brain and spinal cord together makes the central nervous system.

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