The structures labeled F are the
A) mitochondria.
B) sarcomeres.
C) nuclei.
D) centrioles.
E) troponin molecules.
A) mitochondria.
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Which of the following is a function of hCG?
A. It stimulates the release of enzymes that enable the blastocyst to implant into the endometrium. B. It breaks down the corpus luteum. C. It helps protect the blastocyst against being rejected. D. It prevents the developing placenta from secreting hormones.
Gastric secretion is inhibited by __________.
a. pepsinogen b. gastrin c. secretin d. trypsin
In addition to endocrine glands, some organs whose functions are primarily nonendocrine also produce hormones. These endocrine tissues include ________ and ________
A) parathyroids, skin B) heart, kidneys C) adipose tissue, sweat glands D) gastrointestinal tract, adrenals
The AV valves close when ________
A) ventricular systole begins B) ventricular diastole begins C) ventricular pressure drops below the pressure in the large arteries leaving the heart D) atrial contraction occurs