QUESTION 14 Assume that for a certain biploar cell in the retina, glutamate opens potassium ion channels. In the dark, this bipolar cell will: O depolarize O hyperpolarize QUESTION 15 Using the root "sarco", type in the specialized term for the muscle cell plasma membrane.

QUESTION 10 Which of the following statements is false concerning the motor protein families of kinesins and dyneins? Kinesins and dyneins A OG OD. have tails that bind to the actin filaments move along microtubules, actin filaments, and intermediate filaments derive their energy strictly from GTP hydrolysis All of the above

QUESTION 39 Cell bodies of are found in the Alpha motor neurons; ventral horn of the spinal cord Unipolar sensory neurons; dorsal root ganglia Third order dorsal column pathway neurons; thalamus All of the above

 QUESTION 10 When an action potential depolarizes the axon terminal, opening of causes O Ligand-gated Ca++ channels; the action potential to "jump" to the post-synaptic membrane Voltage-gated Na+ channels; release of transmitter into the synaptic cleft. Voltage-gated Ca++ channels; a graded depolarization in the post-synaptic membrane O Voltage-gated Ca++ channels; vesicular exocytosis to release transmitter

Question 16

QUESTION 11 Green Rf = 0.89 Red Rf 0.81 Blue Rf = 0.72 Yellow Rf = 0.77 Which colored pigment has the greatest affinity for the stationary phase? O yellow Ⓒred O green O blue

QUESTION 19 Which of the following is when muscle contraction occurs with a single electrical shock? O A. Fused tetanus O B. Twitch O C. Summation O D. Complete tetanus

QUESTION 6 In a voltage clamp: O A. A constant current across the membrane is maintained in order to counter balance changes in membrane potential. O B. A variable voltage is applied across the membrane in order to maintain a constant membrane potential O C.Avariable current is applied across the cell membrane in response to changes in the ion concentration outside the cell. O D.Changes in current applied to a membrane in order to maintain a constant voltage represent the flow of ions through channels in the membrane O E. both A. and C. O F. Both B. and D.

QUESTION 1 Maximal tension in a skeletal muscle contraction is generated.. OA When the sarcomeres are at about 100 to 120 percent of their natural length. OB. When the muscle fiber is stretched before the contraction. OC. When the muscle fiber is shortened before the contraction, and there is a maximal zone of overlap. D. When the sarcoplasmic reticulum releases fewer calcium ions. W

QUESTION 30 Which of the following is characteristic of the events at the inhibitory synapse? O Synaptic vesicles bind to the postsynaptic membrane influx of sodium into the postsynaptic neuron Efflux of potassium into the postsynaptic neuron There is an efflux of calcium from the presynaptic terminal