The Total Number of Muscle Fibers Is Fixed at an Early

question 137

Multiple Choice

The total number of muscle fibers is fixed at an early age, but __________.

• A) At adolescence, males exhibit rapid hypertrophy of muscle.
• B) In comparison to males, females exhibit a more rapid hypertrophy of muscle.
• C) Males lose muscle mass faster at an early age when they remain sedentary.
• D) Males tend to exhibit muscle hypertrophy at a later age than females.

---

Definitions:

Common Ancestor

An ancestral organism from which two or more descendant species evolved.

Hominins

Members of the human lineage, including all species that have arisen since the split from our common ancestor with chimpanzees, characterized by bipedalism and larger brains.

Bipedalism

The ability to walk on two legs, a characteristic mainly observed in humans among primates.

Foramen Magnum

A large opening in the base of the skull through which the spinal cord enters and connects to the brain, indicative of bipedal or quadrupedal locomotion in vertebrates.