BIOS 256 Exam 4 - –Answer axon 2. Depolarization means –Answe...

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BIOS 256 Exam 4

• The part of a neuron that conducts impulses away from its cell body is called a

–Answer axon

• Depolarization means

–Answer the inside of a cell gets more positive

• The resting membrane potential is characterized by

–Answer high potassium and protein inside the cell, and high sodium and calcium outside the cell

• Inside an activated cell

–Answer Na and Ca are higher in concentration than in the resting stage

• Which period of neuron action potential is characterized by a temporary loss of excitability

–Answer refractory period

• Saltatory conduction is made possible by

–Answer the myelin sheath

• Exocytosis of synaptic vesicles is dependent upon

–Answer increased intracellular calcium

• An inhibitory postsynaptic potential (IPSP) is associated with

–Answer hyper-polar- ization

• The role of acetylcholinesterase is to

–Answer destroy acetylcholine shortly after its release by the axonal endings 1 / 2

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• Which brain waves are not normal for adults but common for children

–Answer theta

• REM sleep is associated with

–Answer temporary skeletal paralysis, except for the extrinsic eye muscles

• Storing information in long-term memory

–Answer is facilitated by excitement

• Inhibition of the reticular activating system results in

–Answer sleep

• Which controls the motor aspects of speech

–Answer Broca's areas of the cerebrum

• Which kind of neural imagine can also be used as a therapy to treat depression

–Answer rTMS

• Which controls goal-directed behavior and is often affected by abused drugs

–Answer midbrain dopaminergic neurons

• Preparing the body for the "fight-or-flight" response is the role of the

–Answer sym- pathetic nervous system

• Sympathetic responses generally are widespread because

–Answer norepinephrine acts indirectly through a second messenger (slower)

• Alpha 1 receptors respond to--- and--- smooth muscles of various blood vessels including

those of the kidneys –Answer

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