Nervous System 1Version en ligne Answer all that are correct par Nicole Acker 1 What are the elements of resting membrane potential? Choose one or more answers a Electrical equilibrium across the cell membrane b -70 mV c outside of the neuron is more negative d Leaky K channels move K to the outside of the cell membrane 2 How do leaky K channels effect resting membrane potential? Choose one or more answers a Leaky K causes the inside of the cell to lose a small amount of + charge b Leaky K channels cause the inside of the cell to be slightly positive c Leaky K channels causes the outside of the cell to be slightly positive d Leaky K channels cause K to move outside the cell 3 As negative charge builds in the cell, K is drawn back inside the cell. a True b False 4 What is true regarding equilibrium potential of potassium? Choose one or more answers a As negative charge increases, more and more K is drawn into the cell until one K leaves for every K entering. b K equilibrium potential is around -90mV c Na travels in the same direction as K d Na travels into the cell 5 Select all that are TRUE regarding leaky channels Choose one or more answers a Leaky K moves K inside the cell b Leaky K moves K outside the cell c Leaky Na moves Na inside the cell d Leaky Na moves Na outside the cell 6 In resting membrane potential, the cell is slightly more permeable to K a True b False 7 What is the function of K/Na ATPase? Choose one or more answers a The assist the leaky channels in building an electron gradient b To pump Na/K back to where they started c To initiate an action potential d Maintains resting membrane potential 8 Excitatory input causes... Choose one or more answers a hyper polarization b depolarization 9 inhibitory input causes... a hyper polarization b Depolarization 10 The additive effect of summation is... Choose one or more answers a when multiple post synaptic terminals merge together b when multiple presynaptic neurons effect a post synaptic neuron c when multiple nerves increase an action potential 11 Which Ions are responsible for repolarization? a Na b K 12 The type of glial cell that myelinated an axon in the CNS Choose one or more answers a Astrocyte b oligodendrocyte c schwann cell d choroid plexus 13 Which of the following statements about the insulin receptor is FALSE Choose one or more answers a Once activated, it undergoes autophosphorylation b It requires binding by two insulin molecules to be activated c It catalyzes the phosphorylation of the insulin response substrate d It is located entirely in the cytoplasm 14 The deficiency of which vitamin is associated with neural tube defects? Choose one or more answers a B6 b Calcium c Folic Acid d B12 15 Which of the following is NOT a class of molecules used as a neurotransmitter? a Peptides b Catecholamines c Amino Acids d Enzymes 16 The release of a neurotransmitter into the synaptic cleft results from the influx of Choose one or more answers a Na b K c Ca d Cl
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