Which of the following is NOT a function of a macrophage?

A) To engulf pathogens.
B) To produce an antibody.
C) To present pathogens.
D) To digest pathogens.
E) To activate T-lymphocytes.


Ans: B) To produce an antibody.

Biology & Microbiology

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The statements about transport of Ca2+ from the cytosol (low Ca2+ concentration) into the endoplasmic reticulum (high Ca2+ concentration) are true EXCEPT which of the following?

A. Calcium movement involves the use of a pump. B. Calcium movement involves active transport. C. Calcium movement occurs by facilitated diffusion using a transporter protein. D. Calcium movement requires energy. E. Calcium movement occurs through a transmembrane protein.

Biology & Microbiology

What type of factors can trigger migration behavior in organisms?

a. seasonal weather changes b. food availability c. hormonal signals associated with maturation or reproduction d. all of these

Biology & Microbiology

Generally, the energy for pumping protons outside of a plant cell comes most directly from ____

a. sunlight b. starch c. ATP d. diffusion e. glucose

Biology & Microbiology

What hormone, secreted by the stomach, increases the secretion of acids by cells of the stomach lining?

a. amylase b. gastrin c. pepsin d. pepsinogen e. insulin

Biology & Microbiology