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