Which of the following pairs is incorrectly matched for cells and the molecules they secrete?

A. Mast cells; histamine
B. Natural killer cells; toxic chemicals
C. Eosinophils; toxic chemicals
D. Neutrophils; heparin
E. Basophils; heparin


Answer: D

Biology & Microbiology

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The term used when oxidative phosphorylation uses oxygen as the terminal electron acceptor is:

a. substrate-level phosphorylation. b. fermentative metabolism. c. anaerobic respiration. d. aerobic respiration.

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Sitting in the sun on a hot day, a dog starts to pant and finally gets up and moves into the

shade. These activities help the dog maintain a constant body temperature; thus, this is an example of what process found in all living organism?

a. energy acquisition b. reproduction c. homeostasis d. evolution

Biology & Microbiology

The largest and most complex assembly of proteins in most eukaryotic cells are the:a

flagella b. ribosomes c. smooth ER d. nuclear pores e. chromosomes

Biology & Microbiology

Their cell wall, if present, may contain peptidoglycans:

A. Prions B. Viruses/viroids C. Eukaryotes D. None of the above

Biology & Microbiology