Physiology Quiz: Random Physiology Questions - Part 4

Physiology Quiz -
Random Physiology Questions - Part 4

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

(1) This motor protein is involved in the transport of vesicles and organelles toward the axon terminal (anterograde transport).

(2) Most sensory neurons belong to this structural class of neurons:

	(A) Bipolar
	(B) Pseudo-unipolar
	(C) Multipolar

(3) The channel pore of the nicotinic acetylcholine receptor is permeable to both Na⁺ and K⁺. The relative p_K : p_Na permeability of the selectivity filter is:

	(A) 1 : 1 (the channel pore is equally permeable to Na⁺ and K⁺)
	(B) 1 : 2 (the channel pore permeability to Na⁺ is greater than the permeability to K⁺)
	(C) 1 : 0.5 (the channel pore permeability to K⁺ is greater than the permeability to Na⁺)
	(D) 1 : 10 (the channel pore permeability to Na⁺ is significantly greater than the permeability to K⁺)
	(E) 1 : 0.1 (the channel pore permeability to K⁺ is significantly greater than the permeability to Na⁺)

(4) Which of the following directly activates myosin light chain kinase in smooth muscle cells?

	(A) Ca²⁺ alone
	(B) Calmodulin alone
	(C) Ca²⁺-calmodulin complex
	(D) Myosin light chain phosphatase
	(E) None of the above

(5) The squid giant axon has been indispensable in allowing neuroscientists to gain a deep understanding of the nature of the action potential and its propagation. On average, what is the diameter of a typical giant axon obtained from the squid?

	(A) 1 μm
	(B) 10 μm
	(C) 100 μm
	(D) 1 mm
	(E) 10 mm

(6) Which of the following is oxytocin?

	(A)
	(B)
	(C)
	(D)
	(E)