The specificity of hormones is due to
a. specialized hormone secretion.
b. molecular rearrangement at the site of action.
c. specific binding of hormones to plasma proteins.
d. specialization of target-cell receptors.
e. inactivation of hormones by the kidneys.
D
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Parasympathetic effects are localized and short-lived because
A) muscarinic receptors are deactivated by norepinephrine. B) acetylcholine is inactivated at the synapse by acetylcholinesterase. C) norepinephrine hyperpolarizes the postganglionic membrane. D) norepinephrine is inactivated at the synapse by monoamine oxidase. E) epinephrine blocks the muscarinic receptors.
Limb musculature of tetrapods is developmentally _____________ to fin musculature of fish
Fill in the blank with the correct word.
The properties of the glomerular membrane are collectively referred to as the:
a. glomerular properties b. filtration quotient c. filtration coefficient d. membrane coefficient e. membrane quotient
If the zygote splits into two separate cells,
A. identical twins result. B. fraternal twins result. C. dizygotic twinning occurs. D. both cells die. E. paternal twins result.