Physiology Quiz: Random Physiology Questions - Part 2

Physiology Quiz -
Random Physiology Questions - Part 2

This quiz contains a set of questions randomly selected from different topics.

(1) All other factors being equal, axons with smaller diameters conduct action potentials at a higher velocity than do axons with larger diameters.

	True
	False

(2) Action potentials travel along axons in a non-decremental fashion.

	True
	False

(3) This motor protein is involved in the transport of vesicles and organelles toward the neuron cell body (retrograde transport).

(4) A bundle of axons is referred to as a:

(5) Which of the following is (are) possible sequence of events following the opening of neuronal voltage-gated Na⁺ channels?

	(A) Open state → Closed state
	(B) Open state → Inactive state → Closed state
	(C) Open state → Closed state → Inactive state
	(D) Open state → Inactive state → Open state
	(E) All of the above transitions are possible

(6) All mammalian axons are myelinated.

	True
	False

(7) Similar to the neuronal action potential, graded potentials are all-or-nothing.

	True
	False

(8) In an average-sized individual, the total volume of plasma filtered every day in both kidneys combined is:

	(A) 100 L
	(B) 125 L
	(C) 180 L
	(D) 250 L
	(E) 500 L

(9) Taste buds degenerate with increasing age leading to reduced taste sensitivity in old age.

	True
	False

(10) Which of the following is (are) true of the nicotinic acetylcholine receptor?

	(A) The nicotinic acetylcholine receptor is a ligand-gated ion channel.
	(B) The nicotinic acetylcholine receptor is a pentameric complex.
	(C) One acetylcholine molecule must bind to each of the two α subunits in the receptor complex in order to gate the channel open.
	(D) Once gated open, the channel pore is equally permeable to Na⁺ and K⁺
	(E) This type of receptor is also commonly referred to as a receptor channel.