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CBNS 120 EXAM REVIEW QUESTIONS AND ANSWERS, GRADED A+/ VERIFIED. A complete cycle of the Na/K ATPase requires: - -all of the above (Na binding, K binding, Phosphorylation, Dephosphorlation) ATPases (pumps) like the Na/K Pump transfer ions across the membrane at rates of - - 10^0-10^3 Blocking the Na/K pump could: - -All of the Above Decreasing [Na]o would affect the Na/Ca (NCX) exchanger as follows: - -Decrease transporter activity During a cycle of the Na/Ca (NCX) exchanger: - -A & C...

CBNS 120 EXAM REVIEW QUESTIONS AND ANSWERS, GRADED A+/ VERIFIED. __________ synapses occur when current flows through _______ ___________. - -Electrical Gap junctions _____________ transmission occurs when a transmitter binds to a receptor and the protein undergoes a ____________ change. - -Chemical Conformational At the neuromuscular junction there is _____ quanta - -200 At automatic synapses there is ___ quanta - -20 The surface area of the cell _________ due to vesicle fusion - -Inc...

CBNS 120 EXAM REVIEW QUESTIONS AND ANSWERS, GRADED A+/ VERIFIED. "Gating Current": Movement of S4 Helix "Voltage Sensor" - -movement of the S4 voltage sensors, leading to Na channel activation, results in gating current movement of gating charge as a swiveling cylinder ex. internal crevice (gate closed) --> external crevice (gate open) movement of gating charge as a "paddle" - movement of charge within the membrane creates a "gating current" Action Potential - -increasing the...

CBNS 120 FULL PROBLEM SET QUESTIONS AND ANSWERS, GRADED A+/ VERIFIED. The slow AHP (after-hyperpolarization lasting for tens of milleseconds to seconds) results from: - -Calcium Activated gK In the Hodgkin-Huxley squid axon experiments, the late outward current could be isolated by: - -B & C Only (treating the axon with TTX (tetrodotoxin) & Stepping the membrane potential to the Na equilibrium potential) At threshold for the action potential: - -The outward leak K current equals the i...

CBNS 120 LECTURES 12-13 NOTES/ QUESTIONS AND ANSWERS. Acetylcholine action on endothelial cells activates the - -mnogr Activation of Gs leads to elevated levels of - - Cardioacceleration by norepinephrine involves synthesis of - -(order given) G protein inhibition of N-type Ca channels in sympathetic neurons involves direct binding of ______ to the channel: - -c GPCR activation leads to a multi-step signaling cascade. Whic

CBNS 120 LECTURES 14 AND 15, REVIEW QUESTIONS AND ANSWERS, GRADED A+/ VERIFIED. ______ is a smaller ________ in postsynaptic calcium concentration, accompanied by a ____________ in the number and sensitivity of post synaptic ____________ - -LTD Increase Reduction Receptors ______ is mediated by an ___________ in calcium concentration in the _______ _____________ cell - -LTP Increase Post synaptic _________ collaterals project into CA3, this is the circuit for _____________ - -Sch...

CBNS 120 MIDTERM 1 EXAM REVIEW QUESTIONS AND ANSWERS, GRADED A+/ Cajal used the [_________] stain to prove the [___________] Doctrine. - -golgi; neuron Conductance is the reciprocal of: - -resistance Hyperpolarization occurs when the membrane potential becomes more [_____________], while depolarization causes the membrane potential to become more [_______________]. - -negative; positive Permeability indicates the presence of ______, while conductance requires _______ and ______. - -op...

CBNS 120 MIDTERM 1 EXAM REVIEW. GRADED A+/ VERIFIED. conductance is inversely proportional to resistance hyperpolarization occurs when membrane potential becomes more negative depolarization occurs when the membrane potential becomes less negative what does permeability indicate? presence of open channels what does conductance require ions and charge carriers the membrane potential at which the diffusional force created by an ion gradient is equal and opposite to the electrical for...

CBNS 120 MIDTERM 2 EXAM REVIEW QUESTIONS AND ANSWERS, GRADED A+/ VERIFIED. equation relating voltage, current and rin. - -Rin = V/I define the membrane time constant (τ). - -τ is the time required for a first order exponential process to decay to 1/e of its original value, or to increase to 1-1/e of its maximum value. How is membrane time constant (τ) related to membrane resistance and capacitance? - - τ = RC equation describing an exponential time course of decreasing membrane vo...

CBNS 120 MIDTERM 2 REVIEW QUESTIONS AND ANSWERS, GRADED A+/ VERIFIED. "M" potassium channels (check all that apply): - have a relatively high open probability at Em - are inhibited by PIP2 - mediate the late slow IPSP - mediate the late slow EPSP - cause an excitatory response through decreased resting conductance have a relatively high open probability at Em, mediate the late slow EPSP, cause an excitatory response throughterm-48 decreased resting conductance. The following cells ...