The secretion of which hormone decreases when calcium blood levels increase?

a. calcitonin
b. parathyroid hormone
c. thyroid hormone
d. epinephrine
e. norepinephrine


b

Biology & Microbiology

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Antigens are located on the surface of:

A. B lymphocytes. B. memory cells. C. pathogens. D. plasma cells.

Biology & Microbiology

Which of the following antibiotics are produced by members of the genus Bacillus?

A. Gramicidin B. Bacitracin C. Polymyxin D. All of the choices are correct.

Biology & Microbiology

The advantage of microscopic visualization in bacterial diagnosis is that the method is:

A. very sensitive. B. easy to perform. C. easy to interpret. D. able to identify all clinically relevant microbes.

Biology & Microbiology

The nucleus includes all of the following EXCEPT__________.

a) cytoplasm b) nuclear envelope c) DNA d) nucleolus e)chromatin

Biology & Microbiology