The First Humanlike Brain Evolved

question 47

Multiple Choice

The first humanlike brain evolved:

• A)700 million years ago.
• B)250 million years ago.
• C)6 million years ago.
• D)100,000 to 200,000 years ago.

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Definitions:

Lateral Flexion

The bending of the body to the side, commonly referring to the spine but can apply to other limbs or joints.

Bulbospongiosus

A muscle of the perineum that covers the bulb of the penis in males and contributes to erection, ejaculation, and the sensation of orgasm, while in females, it aids in clitoral erection and the closing of the vagina.

Ischiocavernosus

A muscle situated at the base of the penis or clitoris that plays a role in sexual function by helping to maintain an erection by compressing the outflow veins.

Pelvic Floor

The layer of muscles stretching under the pelvis, which supports the pelvic organs and controls continence.