Which of the following ions is most likely to cross the plasma membrane of a resting neuron?

A) K+
B) Na+
C) Ca2+
D) Cl-
E) Mg2+


Answer: A

Biology & Microbiology

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Flagella move in a whip-like motion.

Answer the following statement true (T) or false (F)

Biology & Microbiology

There is genetic evidence of interbreeding

between Homo neanderthalensis and H. sapiens about ___ years ago but not after ___ years ago.

a. 6000---4000 b. 60,000---40,000 c. 600,000---400,000 d. 600---400 e. there is no genetic evidence of interbreeding between these two species

Biology & Microbiology

The combination of villi and microvilli provides the small intestine with ____

a. a large surface area for digestive functions b. elastic properties c. a high enzyme producing capacity d. motility e. sensitivity to chyme contents

Biology & Microbiology

When a phosphate group is removed from an ATP molecule, energy is released.

a. true b. false

Biology & Microbiology