Which form of intracellular signaling involves the

ATI RN

ATI RN Test Bank

Which form of intracellular signaling involves the release of neurotransmitters from one neuron to another?

A. Contact-dependent B. Paracrine C. Synaptic D. Endocrine

Correct Answer: C

Rationale: Synaptic signaling involves neurotransmitter release across synapses between neurons.

What is the process by which a cell engulfs extracellular fluid and molecules?

A. Phagocytosis B. Endocytosis C. Exocytosis D. Pinocytosis

Correct Answer: D

Rationale: Pinocytosis is the engulfment of fluid and dissolved molecules.

Which structure is responsible for organizing microtubules and assisting in cell division?

A. Centriole B. Nucleus C. Ribosome D. Peroxisome

Correct Answer: A

Rationale: Centrioles organize the spindle fibers for cell division.

Which of the following is NOT a form of intracellular signaling?

A. Paracrine signaling B. Synaptic signaling C. Autocrine signaling D. Diurnal signaling

Correct Answer: D

Rationale: Diurnal signaling is not a recognized form of intracellular signaling.

Which process allows cells to export large molecules or waste materials from the cell?

A. Phagocytosis B. Pinocytosis C. Exocytosis D. Facilitated diffusion

Correct Answer: C

Rationale: Exocytosis exports materials via vesicles.

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