In capillaries, bicarbonate ion crosses the RBC membrane. But an electrostatic charge doesn't build up because ___________ crosses in the opposite direction.

A) H+
B) Na+
C) Cl-
D) HCO3-


Answer: C) Cl-

Anatomy & Physiology

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The arachnoid mater is

a. the innermost meningeal layer. b. a delicate, richly vascularized meningeal layer that is "cobwebby" in appearance. c. a tough, inelastic membrane that covers the central nervous system. d. involved with the formation of cerebrospinal fluid. e. more than one of these answers is correct.

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Indicate whether the statement is true or false.

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What are the gaps between myelinated segments of an axon called?

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