Pharmacology physiology Flashcards
(53 cards)
Affinity is
How well a drug will bind to its receptor or binding
site.
High affinity means
The drug will more readily bind to its target at a low concentration
Agonist
Mimics the action of a naturally occurring substance
Antagonist
Blocks/inhibits the action of an agonist
The CNS is composed of
Brain and spinal cord
The PNS is composed of
The nerves that extend throughout the body
The somatic nervous system controls
Voluntary movement and sensory information
The autonomic nervous system controls
involuntary physiologic processes
What are the three subdivisions of the autonomic nervous system
Sympathetic, Parasympathetic, Enteric
What is a presynaptic cell?
A sending cell
What is a post synaptic cell?
A receiving cell
Fight or flight is
Sympathetic
Rest and digest is
Parasympathetic
The enteric nervous system is
The second brain the is embedded in the GI tract
Sympathetic Presynaptic preganglionic fibers are shorter because?
they are
located near the spinal
cord, requiring less travel
for signal transmission
Why are parasympathetic preganglionic fibers longer?
the
parasympathetic ganglia
are located near or
within the target organs,
necessitating longer
travel distances
The nervous system is a _____ loop system
closed
Define a negative feedback loop
A loop that focuses on correcting deviations to return to a set point
Define a positive feedback loop
A loop that amplifies responses rather than correcting it.
Name a positive feedback loop
Childbirth
Afferent neurons carry
Impulses from receptors to the CNS
Efferent neurons carry
Impulses from the CNS to the body
Interneurons connect
Neurons
Alpha/beta receptors are what classification?
Adrenergic
