ch 12 nervous system flashcards _ Quizlet

A breakdow n of the blood brain barrier dam age to

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Unformatted text preview: id. transport of neurotrans m itters w ithin axons. form ation of ganglia. repair of axons. form ation of cerebrospin al fluid The tiny gaps betw een adjacent Schw ann nodes of ranv ier q uizlet.com/7971136/ch- 12- ner vous- system- flash- car ds/# 11/55 11/3/13 ch 12 ner vous system flashcar ds | Quizlet cells are called ________ R egions of w hite the CN S w ith an abundance of m y elinated axons constitute the ________ m atter. After a m icroglia stroke, w hat ty pe of glial cell accum ulate s w ithin the affected brain region? satellite cells oligodendro cy tes m icroglia ependy m al cells Schw ann cells The k, na m em branes of neurons at rest are v ery perm eable to _____ but only slightly perm eable to _____. N a+; K+ q uizlet.com/7971136/ch- 12- ner vous- system- flash- car ds/# 12/55 11/3/13 ch 12 ner vous system flashcar ds | Quizlet N a+; ClK+; N a+ K+; Cl During depolarizati on, w hich gradient(s) m ov e(s) N a+ into the cell? N a+ does not m ov e into the cell. N a+ m ov es out of the cell. only the electrical gradient both the electrical a nd chem ical gradients only the chem ical gradient electrical a nd chem ical gradients What is the -7 0 v alue for the resting m em brane potential for m ost neurons? +30 m V -90 m V -70 m V The N a+na out k in K+ pum p activ ely transports both sodium and q uizlet.com/7971136/ch- 12- ner vous- system- flash- car ds/# 13/55 11/3/13 ch 12 ner vous system flashcar ds | Quizlet potassium ions across the m em brane to com pensate for their constant leakage. I n w hich direction is each ion pum ped? Both N a+ and K+ are pum ped out of the cell. Both N a+ and K+ are pum ped into the cell. K+ is pum ped out of the cell and N a+ is pum ped into the cell. N a+ is pum ped out of the cell and K+ is pum ped into the cell The na a nd c l concentrati ons of w hich tw o ions are highest outside the cell. N a+ and A(negativ ely charged proteins) K+ and Clq uizlet.com/7971136/ch- 12- ner vous- system- flash- car ds/# 14/55 11/3/13 ch 12 ner vous system flashcar ds | Quizlet K+ and A(negativ ely charged proteins) N a + a nd ClI on leak channels that are alw ay s open are called ________ channels. activ e leak local regulated gated Voltagegated channels are present along the perikary on of neurons. on the surface of dendrites. on the som a of neurons. at the m otor end plate. in the m em brane that cov ers axons in the m em brane that cov ers axons ________ m echanicall channels y gated open or close in response to phy sical q uizlet.com/7971136/ch- 12- ner vous- system- flash- car ds/# 15/55 11/3/13 ch 12 ner vous system flashcar ds | Quizlet distortion of the m em brane surface. Mechanicall y -gated Activ e Voltagegated Leak Chem ically gated ________ chem ically open or gated close in response to binding specific m olecules. Voltagegated and chem ically gated channels Activ ated channels Chem ically gated channels Voltagegated channels Leak channels I f the potassium perm eabilit y of a resting neuron increases abov e the resting perm eabilit y , w ha t the inside of the m em brane w ill becom e m ore negativ e q uizlet.com/7971136/ch- 12- ner vous- system- flash- car ds/# 16/55 11/3/13 ch 12 ner vous system flashcar ds | Quizlet effect w ill this hav e on the transm em b rane potential? There w ill be alm ost no effect on transm em b rane potenti...
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