Nervous Signaling to Smooth Muscle Cells

question 6

Multiple Choice

Nervous signaling to smooth muscle cells

• A) is always inhibitory.
• B) can be excitatory or inhibitory.
• C) is all-or-nothing.
• D) can regulate frequency, but not force, of contraction.

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Definitions:

Bilaterally Symmetrical

An organism is bilaterally symmetrical if it can be divided into mirror-image halves along a single plane, typical of animals like humans and fish.

Axes

References in a plural context, typically meaning more than one of an imaginary line about which a body rotates or a reference line for the measurement of coordinates.

Sessile

Permanently attached to one location (e.g., coral animals).

Beating Flagella

Flagella that exhibit a whip-like motion to propel cells through liquid environments, common in many single-celled organisms and the sperm of many multicellular organisms.