How does smooth muscle differ from skeletal muscle?
a. Smooth muscle attaches to bones via tendons.
b. Smooth muscle has a striated appearance.
c. Smooth muscle undergoes quick contractions.
d. Smooth muscles are connected via gap junctions.
e. Smooth muscle cross bridges form transiently.
d
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A P. bursaria cell that has lost its zoochlorellae is said to be aposymbiotic
It might be able to replenish its contingent of zoochlorellae by ingesting them without subsequently digesting them. Which of the following situations would be most favorable to the reestablishment of resident zoochlorellae, assuming compatible Chlorella are present in P. bursaria's habitat? A) abundant light, no bacterial prey B) abundant light, abundant bacterial prey C) no light, no bacterial prey D) no light, abundant bacterial prey
For most multicellular eukaryotes, including humans, mitochondria are inherited
a. only from the father. b. from both the father and the mother. c. from the mother for females and from the father for males. d. randomly from either the father or the mother. e. only from the mother.
What kinds of solutes move straight through the plasma membrane easily and unassisted?
a. small polar molecules b. small nonpolar molecules c. ions d. large polar molecules
The muscle that separates the thoracic and abdominal cavities is the
a. intercostal muscle. b. pectoral muscle. c. serratus muscle. d. oblique muscle. e. diaphragm muscle.