Carbohydrates:
A. have carbon and oxygen atoms in equal proportions.
B. are the major organic molecules of the body by mass.
C. are nonpolar molecules.
D. are defined by the inclusion of nitrogen in their structure.
E. are composed of only carbon and hydrogen atoms.
A
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The internal carotids and the basilar artery are interconnected by an anastomosis called the
A) common carotid artery. B) basal ring. C) cerebral arterial circle. D) external carotid artery. E) arterial bypass.
____________ are epidermal structures analogous to hair in mammals
Fill in the blank(s) with correct word
When a neuron is in the resting state, ________
A) Na+ leaks out of the cell and K+ leaks into the cell B) both Na+ and K+ leak out of the cell C) both Na+ and K+ leak into the cell D) Na+ leaks into the cell and K+ leaks out of cell
________ results in the production of spermatozoa
A) Spermatogenesis B) Ejaculation C) Urination D) Erection