Which hormone is associated with the biological clock?
a. insulin
b. growth hormone
c. melatonin
d. cortisol
e. prostaglandins
C
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In the case of temperature regulation, an example of an effector is
a. a receptor in the brain. b. a center in the brain. c. a shivering skeletal muscle. d. none of the above.
__________, products of master genes, act as longrange
signals that diffuse out from a source and form a concentration gradient. Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT true of enzyme behavior?
a. Enzyme shape may change during catalysis. b. Enzymes cannot make something happen that would not happen on its own. c. All enzymes have an active site where substrates are temporarily bound. d. Each enzyme can catalyze a wide variety of different reactions. e. Enzymes speed up reactions.
A marine fish is ________ and tends to ________ water to/from the environment
A) hyperosmotic; gain B) hyperosmostic; lose C) hypoosmotic; gain D) hypoosmotic; lose