1.0 0.8 0.6 8 à 0.4 0.2 Relative amount of transmitter release Write a statement
ID: 261424 • Letter: 1
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1.0 0.8 0.6 8 à 0.4 0.2 Relative amount of transmitter release Write a statement describes the depicted phenomenon most accurately? 6. How would an increase in external Ca concentration affect synaptic depression? a. It would increase the rate of depression. b. It would reduce the rate of depression. c. It would decrease the rate of neurotransmitter release and induce depression. d. It would increase the rate of neurotransmitter release and delay depression. e. It would have no effect on depression. 2+ 7. Which symptom would you expect a person with damage to the fovea to experience? a. Total blindness b. Poor peripheral vision c. Difficulty seeing large objects d. Trouble reading e. Increased sensitivity to light 8. Which property best differentiates the types of cones? a. Their location in the retina b. The number of synapses on bipolar cells c. The photopigments they contain d. Their overall ratio to other types of conesExplanation / Answer
The rate of synaptic fatigue or depression is directly proportional to the rate of transmitter release.
6.)The correct answer is (a) Increase in external calcium ion concentration would increase the rate of depression.
7.)Fovea centralis is responsible for sharp central vision necessary for the human activities needing visual detail.Thus, damage to the fovea would cause difficulty in activities such as reading and driving. Thus, the correct answer is (d) Trouble reading.
8.) Cones are of three types based on the pigment they contain, namely: S-cones, M-cones, and L-cones. Each cone is sensitive to visible wavelengths of light that correspond to short-wavelength, medium-wavelength, and long-wavelength light. Thus, the property which best differentiates different types of cones would be- (c) The photosystem they contain.
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