Which of the following is a single-celled layer of epithelium that forms the lining of serous membranes?
A) simple transitional
B) simple columnar
C) simple squamous
D) simple cuboidal
C) simple squamous
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The choroid coat contains no ________.
A. photoreceptors B. muscles C. blood vessels D. melanin
Which heart chambers pump deoxygenated blood?
A. Left atrium and right atrium B. Left atrium and left ventricle C. Left ventricle and right ventricle D. Right atrium and right ventricle E. Right atrium and left ventricle
The adrenal medulla is important to the sympathetic branch of the autonomic nervous system because
A) it is a source of catecholamines and it is considered a modified sympathetic ganglion. B) it is a source of catecholamines. C) it is considered a modified sympathetic ganglion. D) it is a source of catecholamines, it is considered a modified sympathetic ganglion, and it releases epinephrine and norepinephrine directly into the blood. E) it releases epinephrine and norepinephrine directly into the blood.
Which substance, secreted by the stomach, destroys most microorganisms that enter the body in the food, and activates pepsin?
A. Bicarbonate ions B. Hydrochloric acid C. Amylase D. Trypsin E. Intrinsic factor