Nervous System II Flashcards
muscles in front of the thigh?
quadriceps
muscles in the back of the thigh?
hamstring
what is the charge of resting membrane potential?
- 70 mV
T or F
there are more Na leak channels than K leak channels
False
there are more K channels than Na
T or F
resting stage:
leak channels are closed
voltage gates are open
False
during rmp
leak channels are only channels that is open
while, voltage gates are closed
T or F
there are more K channels than Na Channels
true
T or F
resting stage:
leak channels are open
voltage gates are closed
true
what is the ratio of pumps does sodium potassium pump?
3:2
3 Na out, in exchange for
2 potassium in
what is energy is used to activate the sodium potassium voltage gates?
ATP
adenosine triphosphate
Na channels opens brieftly, and Na diffuses quikly into the cell
its is the current making the inside of the cell positive
Local Current
situation when the inside of the cell becomes positive
Depolarization
T or F
If depolarization is not strong enough, the Na+ channels close again, and the local potential disappears without being conducted along the nerve cell membrane.
True
T or F
If depolarization is large enough, Na+ enters the cell so that the local potential
reaches a threshold value.
True
charge of the action potential?
+20
what is the cause of slow closing of voltage gated potassium
hyperpolarization
, action potentials “jump” from one node of Ranvier to the
next along the length of the axon.
Saltatory Conduction
how many nerves does Schwann cells coat or myelinates?
1 nerve only
how many nerves does oligodendrocytes coat or myelinates?
as much as 16 nerves
hormones released during fight or flight situation?
causes adrenalin rush too
epinephrine
what are the inhibitory neurotransmitters?
Serotonin
GABA
Glycine
Endorphins
what are the excitatory neurotransmitters?
norepinephrine
what are the neuro transmitters that are either excitatory or inhibitory
Dopamine
Acetylcholine
sensory receptors for deep tendon reflex
what detects the stretch in the muscle?
Muscle spindle
lower motor injury will result to?
damage in PNS
Hyporeflexia
damage in CNS will result to?
Hyperreflexia
loss of reflex or the minimal reflex
Areflexia
in the brain that is , action potentials “jump” from one node of Ranvier to the
next along the length of the axon.
saltatory conduction
part of the brain that is responsible for motor movement?
cerebullum
movement is incoordinate
ataxia
send impulses to cerebellum
muscle spindle
this is defines the movement or position
proprioception
clasping of hands locking the jaw
jendrrasic manuever
T or F
continuous taps to the tendon will result to delayed or decrease of reaction of reflex
true
kasi napapagod din yung mga tendon
