Which cells form myclin in the CNs (spinal cond and brain)? A) satellite cells B
ID: 181544 • Letter: W
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Which cells form myclin in the CNs (spinal cond and brain)? A) satellite cells B) Microglia C) Astrocytes D) Schwann cells E) Oligendendrocytes Which of the following is not a function of parathyroid hormone (PTH)? A) Lower blood calcium B) Inhibit osteobtast activity C) Stimulate osteoclast activity D) Promote calcitriol synthesiis E) Promote calcium reabsorption by the kidneys When the voltage of a plasma membrane shifts from + 35 mV towards 0 mV, the cell is A) reaching the threshold B) repolarizing C) hyperpolarizing D) depolarizing E) exiting the threshold Exhausted from studying all night, you briefly close your eyes and your mind starts to wander. Which brain waves would be most predominant in an EEG? A) Beta B) Alpha C) Delta D) theta Destruction of the limbic system would mostly affect which of the following? A) Recognition and identification of objects B) Judgement C) Awareness of objects D) Emotions E) Intectual ability Which of the following is correct regarding the occipital lobe? A) It is the principal visual center of the brain. B) It is concerned with voluntary motor functions. C) It is chiefly concerned with mood, memory, and emotions. D) It is likely to play a role in understanding spoken language. E) It is the primary site for receiving and interpreting signals from the general senses.Explanation / Answer
26 . D they are released into bloodstream.
Neurotransmitters arr compounds released from a nerve terminal. When an electrical impulse travels to the end of nerve cell it stimulates the terminal to secrete neurotransmitter at synapse.
27. Eoligodendrocytes
In CNS, oligodendrocytes create myelin sheath. In the nerves outside brain and spinal cord, schwann cells produce myelin.
28. A lowersblood calcium
PTH is a hormone produces by parathyroid gland when the calcium levels in the blood goes less, so that it causes the body to put more calcium into blood.
29. B repolarising
Resting membrane potential is -70 mv when 10 or 15 mv is given it attains -55mv that is threshold of excitation.
It depolarises to attain +30 or +35mv den repolarises to vome back at 0 mv
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