In Males, Which of the Following Is Typically the First

question 61

Multiple Choice

In males, which of the following is typically the first sign that a boy has entered puberty?

• A) voice change
• B) appearance of pubic hair
• C) growth in the size of the testes and scrotum
• D) growth in the size of the penis

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Definitions:

Cytokines

Small proteins released by cells that have a specific effect on the interactions and communications between cells, often involved in immune responses.

Antigens

Substances that are recognized by the immune system and can elicit an immune response, often foreign proteins or polysaccharides found on pathogens.

Perforin

A protein secreted by natural killer cells and cytotoxic T lymphocytes to kill cells by forming pores in their membranes.

Alpha Interferon

A type of protein produced by the body's immune system, used in the treatment of various infections and diseases, including some types of cancer.