Each red blood cell is shaped as a biconcave disk. This allows it to

A) change its shape to squeeze through narrow openings and shrink or swell slightly in response to osmotic conditions.
B) change its shape to squeeze through narrow openings, shrink or swell slightly in response to osmotic conditions, and synthesize new proteins and membrane components readily.
C) shrink or swell slightly in response to osmotic conditions.
D) change its shape to squeeze through narrow openings.
E) synthesize new proteins and membrane components readily.


A) change its shape to squeeze through narrow openings and shrink or swell slightly in response to osmotic conditions.

Anatomy & Physiology

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