Physiology Quiz -
General Principles of Membrane Transport - Part 1

Transport of ions and molecules across biological membranes may occur by passive or active mechanisms and, indeed, membrane transport mechanisms form the basis for many important physiological processes. Test your basic knowledge of membrane transport by taking this simple quiz.

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(1) Which one of the following is NOT consistent with secondary active transport?

	(A) The movement of an ion down its concentration gradient is coupled to the movement of another molecule against its concentration gradient.
	(B) In secondary active transport ATP is hydrolyzed.
	(C) Cotransport and exchange are variations of secondary active transport.
	(D) In secondary active transport, the ion that is moving down its concentration gradient is referred to as the driving ion.
	(E) All of the above are true about secondary active transport.

(2) Which of the following membrane proteins is responsible for generating and maintaining the Na⁺ and K⁺ concentration gradients across the plasma membrane of most mammalian cells?

	(A) Voltage-gated Na⁺ and K⁺ channels
	(B) NaCl and KCl cotransporters
	(C) Na⁺/K⁺/ATPase
	(D) None of the above
	(E) All of the above

(3) Na⁺, and K⁺, Ca²⁺, and Cl⁻ permeation through their respective ion channels represents an example of:

	(A) Passive transport
	(B) Primary active transport
	(C) Secondary active transport
	(D) A and C only
	(E) A, B, and C

(4) With respect to concentration gradients, passive transport is:

	(A) Dissipative
	(B) Accumulative

(5) With respect to concentration gradients, active transport is:

	(A) Dissipative
	(B) Accumulative

(6) Movement of ions through ion channels represents an electrogenic process.

	True
	False

Checking your answers...

Posted: Tuesday, March 10, 2015
Last updated: Tuesday, March 11, 2025

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Physiology Quiz -General Principles of Membrane Transport - Part 1

Physiology Quiz -
General Principles of Membrane Transport - Part 1