Which of the following statements about smooth muscle in arterioles is FALSE?
A) The muscle is multi-unit smooth muscle.
B) Muscle contraction is under intrinsic controls.
C) Muscle contraction is under extrinsic controls.
D) The muscle forms rings around the arteriole.
E) The muscle has inherent (myogenic) tone
Ans: A) The muscle is multi-unit smooth muscle.
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Some eukaryotic cells contain ______ for protection.
What will be an ideal response?
An extended period of torpor entered by an animal during the summer when the environment is too hot
and water is too scarce is called
a. estivation. b. hyperthermia. c. thermal acclimatization. d. hypothermia. e. hibernation.
Which of the following is true of protein-based plant chemical defenses?
A. Plants and animals use the same 20 amino acids to construct proteins, but some plants have additional amino acids. B. Plants use the additional amino acids in their proteins, but animals that ingest them cannot. C. Insect herbivores that consume nonprotein amino acids grow more quickly and live longer. D. Plants can produce protease inhibitors, which bind to the active site of enzymes that break down proteins and enhance their activity. E. Insects that feed on plants with protease inhibitors have increased growth rates.
Some cells retain the capacity to divide throughout their life cycle, whereas others do not divide in adulthood. Give one example of each type
What will be an ideal response?