The earlike extension of the atrium is the
A) ventricle.
B) coronary sinus.
C) coronary sulcus.
D) auricle.
E) atricle.
Answer: D
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The trophoblast is located at the
A. periphery of the blastocyst. B. center of the blastocyst. C. periphery of the morula. D. center of the morula. E. center of the embryoblast.
Which of these stomach cell types is not correctly matched with its function?
A) surface mucous cells: produce mucus B) parietal cells: produce hydrochloric acid C) chief cells: produce intrinsic factor D) endocrine cells: produce regulatory hormones
Unconscious, automatic, stereotyped responses to stimulation that involve visceral receptors and effectors are called ________ reflexes.
Fill in the blank(s) with the appropriate word(s).
Which type of muscle has intercalated disks?
A. Smooth muscle B. Cardiac muscle C. Skeletal muscle D. Both smooth and cardiac muscles.