NB test 1
Terms
undefined, object
copy deck
- What are the characteristics of CSF?
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*derived from plasma
*isoosmotic with blood
*contains virtually no cells
*contains no protein
*rapid turnover
*clearance medium and shock absorber - What is the function of the blood-brain barrier?
- providesa way for nutrients but not waste products to enter CSF
- What are the fuctions of CSF?
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*remove waste products
*shock absorber
*provides a homestatic enviroment for the brain
*prevents the brain from hitting bone during movement - What are the characteristics of a frontal lobe lesion?
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*Marked changes in personality
*problems with initative
*easily irritable, angry - What were some side effects of frontal lobotomies?
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*concentration impaired
*decrease in initative
*decrese in short term memory
*decrease in inhibitions - What are the characteristics of a temporal lobe lesion?
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*disturbance in auditory perception/senesation
*selective attention impaired to auditory/visulal stimuli
*distubance in language perception
*altered sex behavior
*altered personality
*impairment in memory - What is associated with the damage of the basal ganglia?
- uncontrolled movements
- What are the functions of the basal ganglia?
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*programming over voluntary movement
*role in cognition, recieve input for entire cortex
*first output to frontal lobe - What are the 3 major functions of the thalamus?
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*sensation
*arousal
*association - What are the functions of the hypothalamus?
- regulation of arousal, autonomic functions, and endocrine regulation
- What is the fuction of the cerebral peduncles?
- motor control of skeletal muscle
- What are the 3 major functions of the cerebellum?
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*input realted to the position of the body in space
*patterns of muscle movement
*control of muscle tone - What is membrane potential?
- the electrical difference across the membrane
- What factors detirmine resting membrane potential?
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*chemical factors
*membrane properties
*electrical factors
*ionic pumps - What is an absolute refractory period?
- can't induce a second action potential regardless of stimulus
- What is a relative refractory period?
- a second action potential can be induced witha strong enough stimulation
- What does tetrodotoxin do?
- blocks voltage gated Na+ channels
- Which subuint of the voltage gated channel contains the pore?
- alpha
- Which segement is the voltage sensor?
- S4
- What is the selectivity filter of the voltage gated channel?
- P region that connects S5 and S6