Physiology Quiz -
Fenestrated Capillaries

Fenestra is the Latin word for window. The plural form is fenestrae. Fenestrated capillaries are capillaries that have pores in their plasma membranes that allow the passage of fluid, ions, and small molecules. Test your basic knowledge of capillary fenestrae by taking this simple quiz.

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(1) The pore of typical capillary fenestrae is approximately __________ in diameter.

	(A) 0.7 nm
	(B) 7.0 nm
	(C) 70 nm
	(D) 7.0 μm
	(E) 70 μm

(2) Which of the following statements is correct regarding capillaries?

	(A) All capillaries of the body are highly fenestrated.
	(B) With the exception of brain capillaries, most capillaries of the body are highly fenestrated.
	(C) With the exception of kidney capillaries, most capillaries of the body are highly fenestrated.

(3) Blood cells can permeate the pore of capillary fenestrae.

	True
	False

(4) Platelets can permeate the pore of capillary fenestrae.

	True
	False

(5) Water molecules can permeate the pore of capillary fenestrae.

	True
	False

(6) Ions (Na⁺, Cl⁻, K⁺, Ca²⁺, etc.) can permeate the pore of capillary fenestrae.

	True
	False

(7) Once fluid leaves the intravascular compartment through fenestrated capillaries, it:

	(A) enters the cytoplasm of endothelial cells
	(B) joins the interstitial fluid
	(C) contributes to lymph production

(8) Capillary fenestrae are pores that allow the movement of fluid, ions, and small molecules:

	(A) through endothelial cells
	(B) in-between endothelial cells (i.e., through gaps between adjacent endothelial cells)
	(C) Both A and B

Checking your answers...

Posted: Thursday, December 25, 2014
Last updated: Tuesday, March 11, 2025

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Physiology Quiz -Fenestrated Capillaries

Physiology Quiz -
Fenestrated Capillaries