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An investigator places an isolated neuro...

An investigator places an isolated neuron in a calcium-free medium, gives the neuron a suprathreshold stimulus and then performs an assay to test whether neurotransmitter is released into the medium.Which of the following outcomes would you predict ?

A

No neurotransmitter is detected since influx of calcium into the synaptic knob is required for neurotransmitter release

B

No neurotransmitter is detected since influx of calcium is required in order for the neuron to conduct an action potential

C

Neurotransmitter is detected since calcium is not required for action potential conduction and the initial stimulus was suprathreshold

D

We cannot predict the outcome without knowing whether the neuron was myelinated

Text Solution

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The correct Answer is:
A
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MODERN PUBLICATION-NEURAL CONTROL AND COORDINATION-COMPETITION FILE (OBJECTIVE TYPE QUESTIONS)(A. MULTIPLE CHOICE QUESTIONS)
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  2. Nerve gas affects neuromuscular activity by

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  3. An investigator places an isolated neuron in a calcium-free medium, gi...

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  4. Dark adaptation in human eye includes :

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  7. Parts A,B,C and D of the human eys are shown in the diagram. Select t...

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  8. A diagram showing axon terminal and synpase is given. Identify correct...

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  9. One of the following ions are required for nerve impulse transmission ...

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  10. The Organ of Corti is situated on the :

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  11. The following respond to pressure :

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  12. Which one of the following statements is not correct ?

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  14. How do parasympathertic neural signals affect the working the heart

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  15. Which of the following regions of the brain is incorrectly paired with...

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  16. A gymnast is able to balance his body upside down even in the total da...

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  17. Destruction of the anterior horn cell of the spinal cord would result ...

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  19. The correct path followed by sound waves from external ear to inner ea...

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