The bacteria-killing ______ is found in most epithelial tissue secretions.

A. amylase
B. gastric juices
C. lysozyme
D. lactate
E. DNAase


Answer: C

Biology & Microbiology

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The botulinum toxin, which causes botulism, reduces the synaptic release of _____

A) acetylcholine B) epinephrine C) endorphin D) nitric oxide E) gamma-aminobutyric acid (GABA)

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A rapidly growing population is likely to have an age-structure diagram that is

a. bullet-shaped. b. in the shape of an inverted pyramid. c. shows significant bulges in the middle of the diagram. d. constantly changing its shape. e. in the form of a pyramid.

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Smooth muscle in the arteriole walls can vasoconstrict or vasodilate, which:a

helps to regulate blood pressure. b. helps to accelerate the flow of blood through the vessels. c. prevents the back flow of blood into the tissues. d. squeezes oxygen out of the blood. e. adds strength to the blood vessels.

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major causes of diarrhea

What will be an ideal response?

Biology & Microbiology