Multiple Choice
Smooth muscle differs from both cardiac and skeletal muscle in that
A) it can act as a pacemaker for rhythmic contractions.
B) contractions of smooth muscle are not due to interactions between neighboring microfilaments.
C) neighboring cells are electrically connected by gap junctions.
D) neighboring cells are tightly coupled by intercalated discs.
E) the membranes of smooth muscle cells are depolarized by stretching.
Correct Answer:

Verified
Correct Answer:
Verified
Q3: In humans, the _ skeleton includes the
Q30: The action potential that triggers a muscle
Q31: The sarcoplasmic reticulum<br>A) stores calcium.<br>B) sequesters calcium
Q32: Refer to the graph below, showing the
Q33: The major disadvantage of the glycolytic system
Q34: Bricklayers periodically need to carry heavy stacks
Q36: Refer to the diagram below. The contracted
Q37: Fast-twitch fibers are also called _.
Q38: Endoskeletons<br>A) are characteristic of arthropods.<br>B) are located
Q40: Cartilage is<br>A) a matrix of collagen fibers.<br>B)