![]() |
Question: antagonist
Choices:
any exogenous substance that binds to a receptor and produces an opposing effect to the endogenous ligand
Question: baroreceptor
Choices:
mechanoreceptor that senses the stretch of blood vessels to indicate changes in blood pressure
Question: adrenal medulla
Choices:
interior portion of the adrenal (or suprarenal) gland that releases epinephrine and norepinephrine into the bloodstream as hormones
Question: acetylcholine
Choices:
(ACh) neurotransmitter that binds at a motor end-plate to trigger depolarization
Question: agonist
Choices:
any exogenous substance that binds to a receptor and produces a similar effect to the endogenous ligand
Question: beta (ß)-adrenergic receptor
Choices:
one of the receptors to which epinephrine and norepinephrine bind, which comes in two subtypes: ß1 and ß2
Question: alpha (a)-adrenergic receptor
Choices:
one of the receptors to which epinephrine and norepinephrine bind, which comes in three subtypes: a1, a2, and a3
Question: autonomic tone
Choices:
tendency of an organ system to be governed by one division of the autonomic nervous system over the other, such as heart rate being lowered by parasympathetic input at rest
Question: anticholinergic drugs
Choices:
drugs that interrupt or reduce the function of the parasympathetic system
Question: afferent branch
Choices:
component of a reflex arc that represents the input from a sensory neuron, for either a special or general sense
Question: adrenergic
Choices:
synapse where norepinephrine is released, which binds to a- or ß-adrenergic receptors