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final

phisiology week 7-13

QuestionAnswer
nerve impulse a wave of electrical fluc-tuation that travels along the plasma membrane.
Steps of the Mechanism That Produces an Action Potential 1 A stimulus triggers stimulus-gated Na⫹ channels to open and allow inward Na⫹ diffusion. This causes the membrane to depolarize. 2 As the threshold potential is reached, voltage-gated Na⫹ channels open. 3 As more Na⫹ enters the cell through voltage-g
ng membrane potential (RMP) Membrane voltage when the neuron is not excited and not conducting an impulse
Local potential Temporary fluctuation in a local region of the membrane in response to a sensory or nerve stimulus; may be an upward or downward fluctuation in voltage; loses amplitude as it spreads along membrane
Threshold potentia Minimum local depolarization needed to trigger voltage-gated channels that produce the action potentia
action potential Temporary maximum depolarization of membrane voltage that travels to end of axon without losing amplitud
Three distinct layers compose the meninge . Dura mater 2. Arachnoid mater 3. Pia mater
dura mater made of strong white fibrous tissue, serves as the outer layer of the meninges and also as the inner periosteum of the cranial bones. T
The arachnoid mater , a delicate, spiderweb-like layer, lies between the dura mater and the pia mater, or innermost layer of the meninges.
The transparent pia mater adheres to the outer surface of the brain and spinal cord and contains blood vessels.
CN I Olfactory sense of smell
CN II Optic vision
CN III Oculomotor Eye movements, regulation of size of pupil, accommodation (for near vision), proprioception (muscle sense)
CN IV(4) Trochlear eye movement
CN V Trigeminal Sensations of head and face, chewing movement
CN VI Abducen Abduction of eye, proprioceptio
CN VII Facial Taste buds of anterior two thirds of tongue Facial expressions, secretion of saliva and tears, taste
Created by: cicilyross
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