Question 13 (1 point) Which of the following statements is NOT true regarding th

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Question 13 (1 point) Which of the following statements is NOT true regarding the structure and function of neurons? General sensory neurons have one long axon and one long dendrite. Multi-polar neurons are usually either inter-neurons or motor neurons. Some special sensory neurons are bipolar neurons. Uni-polar neurons are typically general sensory neurons Save Question 14 (1 point) Action potentials are generated from a depolarizing graded potential that occurred along dendrites or cell bodies. Which then is the type of gated ion channels required for action potential propagation? Na+ leakage channels. Mechanically gated ion channels Chemically gated ion channels Voltage gated ion channels

Explanation / Answer

13) General sensory neurons are bipolar neurons. They have one long axon and one dendrite. These are found in retina, cochlea and olfactory epithelium. Thus, option 4 is incorrect.
14) ?Suppose a stimulus is to be given to a certain receptor- assume touch receptor. Now, the mechanical touching of receptor will cause sodium stretch sensetive gates to open and the membrane potential will deviaye positively. Further, when membrane potential will reach threshold, voltage gated sodium channels open amd acrion potential is generated. Now, the sodium ions diffuse to nearby neuron and cause the potential of neuron to deviate close to threshold potential. At threshold VGC pf sodium open and acrion potential is further generated and propogated.
So, sodium voltage gated channels are required for generation and propogation of acrion potential. Option 4 is correct.

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