Which of the following statements regarding hormon

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PN Learning System Medical Surgical Endocrine Practice Quiz Questions

Question 1 of 5

Which of the following statements regarding hormones is incorrect?

A. Hormones and neurotransmitters require a synapse in order to communicate information to other cells and tissues. B. Only cells that have receptors to a certain hormone may be affected by that hormone. C. Hormones can cause target cells to alter patterns of gene expression, producing proteins in different quantities D. G proteins and CAMP are second messengers that serve to enhance or amplify the hormonal effect.

Correct Answer: A

Rationale: Hormones act via bloodstream, not synapses (neurotransmitters do); others are true: receptor specificity, gene expression, second messengers.

Question 2 of 5

Which statement is correct regarding the Frank-Starling Principle (Starling's Law)?

A. SV increases as a result of EDV increase. B. Heart rate increases with greater venous return. C. SV increases in response to greater afterload or peripheral resistance. D. SV increases as a result of ESV increase.

Correct Answer: A

Rationale: SV rises with EDV (preload) due to stretch; others are unrelated or opposite.

Question 3 of 5

All are responses to hemorrhaging except:

A. Cardiac and aortic reflexes increase cardiac output. B. Constriction of arterioles. C. Constriction of veins. D. Capillary hydrostatic pressure is increased.

Correct Answer: D

Rationale: Hemorrhage reduces hydrostatic pressure; others compensate for blood loss.

Question 4 of 5

A sensitized B cell is activated once:

A. it binds a helper T cell that releases cytokines. B. it binds a cytotoxic T cell. C. memory B cells have been cloned. D. it has cloned plasma cells.

Correct Answer: A

Rationale: Helper T cells release cytokines to activate B cells for antibody production.

Question 5 of 5

Identify and calculate the following volumes and capacities: Expiratory Reserve Volume

A. N/A B. N/A C. 1000mL D. N/A

Correct Answer: C

Rationale: ERV is 1000 mL, extra air exhaled beyond TV.

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Which of the following statements regarding hormones is incorrect?

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PN Learning System Medical Surgical Endocrine Practice Quiz Questions

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