Darwin Believed That

question 8

Multiple Choice

Darwin believed that

• A) species evolved
• B) humans and nonhuman animals share many traits
• C) nonhuman animals can show intelligent behavior
• D) all of the above

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Definitions:

Acetylcholine

A neurotransmitter in both the peripheral and central nervous system that plays a key role in muscle activation and various cognitive functions.

Excitation-Contraction

A biological mechanism that describes the process of muscle fiber contraction triggered by electrical impulses.

T Tubules

Tube-like structures in muscle cells that play a role in transmitting electrical impulses from the cell surface to the interior, triggering muscle contraction.

Sarcolemma

The fine transparent tubular sheath which envelops the fibers of skeletal muscles.