Many proteins on the outer surface of the cell are receptors, sites that "recognize" and bind with specific extracellular chemical messengers (signal molecules) in the cell's environment

a. True
b. False
Indicate whether the statement is true or false


True

Anatomy & Physiology

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The enzyme _____________ resides in the synaptic cleft and breaks down molecules of ACh

Fill in the blank with correct word.

Anatomy & Physiology

White blood cells engulf foreign particles by means of

A. macrocytosis. B. phagocytosis. C. exocytosis. D. pinocytosis. E. prestocytosis.

Anatomy & Physiology

The ionization of a/an ________ releases hydrogen ions and increases the concentration of hydrogen ions in a solution.

A. solvent B. salt C. acid D. base

Anatomy & Physiology

Irritation of the phrenic nerve may cause diaphragm spasms called hiccups

Indicate whether the statement is true or false

Anatomy & Physiology