Which muscle tissue type is responsible for involu

ATI RN

ATI RN Test Bank

Which muscle tissue type is responsible for involuntary contractions of the digestive tract?

A. Skeletal muscle B. Cardiac muscle C. Smooth muscle D. Striated muscle

Correct Answer: C

Rationale: Smooth muscle powers involuntary contractions in the digestive tract.

Which cellular structure is responsible for breaking down cellular waste and debris?

A. Ribosome B. Nucleus C. Lysosome D. Golgi apparatus

Correct Answer: C

Rationale: Lysosomes contain enzymes that degrade waste materials and cellular debris.

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.

Which of the following is NOT a function of the endoplasmic reticulum?

A. Synthesizing lipids B. Detoxifying drugs and poisons C. Modifying and packaging proteins D. Synthesizing proteins

Correct Answer: C

Rationale: Modifying and packaging proteins is a function of the Golgi apparatus, not the ER.

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.

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