The nerve impulse travels down an , away from the

ATI RN

ATI RN Test Bank

The nerve impulse travels down a(n) , away from the cell body.

A. dendrite B. axon C. microglia D. collagen fiber

Correct Answer: B

Rationale: The axon conducts the nerve impulse away from the neuron's cell body.

Ions have:

A. only positive charges B. only negative charges C. either positive or negative charges D. no charge

Correct Answer: C

Rationale: Ions are charged (positive cations or negative anions) due to electron gain/loss.

Engulfing of solid material by cells is called:

A. pinocytosis B. phagocytosis C. active transport D. diffusion

Correct Answer: B

Rationale: Phagocytosis involves engulfing solids (e.g., bacteria); pinocytosis is for liquids.

The molecule to which an amino acid is attached preparatory to protein synthesis is:

A. ribosomal RNA B. messenger RNA C. transfer RNA D. viral RNA

Correct Answer: C

Rationale: tRNA carries amino acids to the ribosome, matching codons via anticodons.

An exocrine gland in which a portion of the secretory cell is discharged with the secretion is termed:

A. apocrine B. merocrine C. endocrine D. holocrine

Correct Answer: A

Rationale: Apocrine glands (e.g., mammary) release part of the cell with secretion; holocrine release whole cells.

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