Quiz 2 Flashcards
cross extensor reflex
withdrawal effect, collateral reflex allows body to compensate on one side for a stimulus on the other
tendon reflex
requires external stimulus to activate. located in the muscle spindle
spatial summation
2 sep neurons firing and adding up to initiate an AP
temporal summation
1 neuron rapid-firing, (combination of graded potentials resulting in a strong signal
conduction velocity
continuous conduction: slower, unmyelinated, more Na+ channels opening and rushing into cell
saltatory conduction: faster, myelinated, AP leaps from one node to next
golgi tendon reflex
prevents damage due to excessive stretch
for smooth onset and termination of muscle contraction
produces muscle relaxation in response to tension
visceral reflex arc
carry out functions of internal organs (ANS)
responsible for contractions of digestive system, reproductive system, dilation of pupil etc.
somatic reflex arc
contracts skeletal muscles and protect body from injuries (SNS)
secretory zone
axon terminals releasing neurotransmitters
trigger zone
axon hillock. where nerve impulses are generated
conduction region
the axon. carries impulses
plasma exhibits Na and K channels
secretory region
plasma membrane exhibits VG calcium channels
cholinesterase
breaks/lysis AcH dissolves ach into acetate and choline
AcH
neurotransmitter of PNS and ANS
GABA
gamma amniotic acid. neurotransmitter blocks impulses between nerve cells in the brain.
if low gaba, anxiety/epilepsy/chronic pain
