As Men Advance Through Middle Adulthood,they Experience a Gradual Decline

question 26

Multiple Choice

As men advance through middle adulthood,they experience a gradual decline in

• A) testosterone level.
• B) sperm count.
• C) ejaculation speed.
• D) all of these things.

---

Definitions:

Phenotype

The observable physical or physiological traits of an organism, resulting from the interaction of its genetic makeup and environmental influences.

Hindbrain

A part of the brain that controls basic life functions like breathing, heart rate, and balance.

Nervous System

The complex network of nerve cells (neurons) and fibers that transmits nerve impulses between parts of the body, enabling communication and coordination between different body parts.

Endocrine System

A network of glands in the body that produce, store, and release hormones into the bloodstream to control many of the body’s functions, including growth, metabolism, and mood.