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Thymosin:

Is secreted by all lymph nodes

Is the fluid within the lymph nodes

Is a hormone

Plays no known role

Answer and Explanation

The Correct Answer is C

A. Is secreted by all lymph nodes:

Thymosin is not produced by lymph nodes; it is secreted by the thymus gland.

B. Is the fluid within the lymph nodes:

Lymph fluid circulates within lymph nodes, not thymosin.

C. Is a hormone:

Thymosin is a hormone secreted by the thymus that plays a role in the development and differentiation of T lymphocytes.

D. Plays no known role:

Thymosin has an important role in immune system development.

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Correct Answer is B

Explanation

A. Potassium

Potassium relates to fluid/electrolyte balance, not directly to infection.

B. WBC count

An elevated white blood cell (WBC) count indicates the body is mounting an immune response, suggesting infection.

C. BUN

BUN measures kidney function and hydration status, not infection.

D. RBC count

RBCs relate to oxygen-carrying capacity (anemia, blood loss), not infection.

A. Movement of blood through the body B. Decreases the spread of disease C. Control hormone levels D. Control electrolyte levels

Correct Answer is B

Explanation

A. Movement of blood through the body:

This is the function of the cardiovascular system, not the lymphatic system.

B. Decreases the spread of disease:

The lymphatic system helps trap and destroy pathogens through lymph nodes and the immune response, reducing the spread of infection.

C. Control hormone levels:

Hormone levels are regulated by the endocrine system.

D. Control electrolyte levels:

Electrolyte balance is primarily maintained by the kidneys and endocrine organs like the adrenal glands.

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Thymosin:

Nursing Test Bank

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