What did Galvani's first round of frog experiments demonstrate? A. Nervous tissue is reactive in the presence of no metal B. Natural electrical properties existed within the nerve that allow for muscle contraction C. Muscle contraction is dependent on the distance between the nerve and 2 metals D. Only man-made elecricity could activate a nerve

What did Galvani's first round of frog experiments demonstrate? A. Nervous tissue is reactive in the presence of no metal B. Natural electrical properties existed within the nerve that allow for muscle contraction C. Muscle contraction is dependent on the distance between the nerve and 2 metals D. Only man-made elecricity could activate a nerve

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter7: The Peripheral Nervous System: Efferent Division

Section: Chapter Questions

Problem 4RE

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Using microelectrodes, a researcher recorded nerve signals in four neurons in the brain . The neurons are called A, B, C, and D in the table below. A, B, and C all can transmit signals to D. In three experiments, the animal was stimulated in different ways. The number of nerve signals transmitted per second by each of the cells is recorded in the table. Write a short paragraph explaining the different results of the three experiment. 09
Multiple Choice Question In an insect sensillum: a. the Semper cell forms the socket. b. the trichogen cell is a unipolar motor neuron that responds to movement of the collar. c. the retinular cell forms the hair-like outgrowth of the cuticle. d. the biological transducers are always bipolar sensory neurons. e. a and b f. c and d
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Many neurotoxins have been used extensively in physiological studies of neurons. When comparing tetrodotoxin found in puffer fish and batrachotoxins from poison dart-frogs, the former had no effect on a neurons resting potential but completely stopped its action potential, whereas the later toxin immediately initiates depolarization of a neuron but prevents repolarization. Can your group hypothesize how these toxins affect the nerve transmission differently?
The following were extracellular recordings obtained from the giant nerve fibers of an earthworm after delivery of a depolarizing stimulus at the time indicated. Which of the following letters corresponds with the fiber that had the fastest action potential conduction velocity? I OA 0.05 0 -0.05 -0.1. + Action Potential 0.024 B W 0.002 0.004 stimulus delivered A OB OC None of the above are correct; all had the same conduction velocity 0.006 C 0.008 0.01
Post-synaptic receptors located on the membrane of skeletal muscle cells allow the muscle cells/fibers to respond to the neural-stimulus. What is the name of the receptors located on the post-synaptic membrane of the muscle cells (you can't find the answer in the textbook; you have to do some research)? 22. 26. A. beta receptors muscle contr alon is actually called The B. alpha receptors C. muscarinic receptorsry D. nicotinic receptors
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The action potential generated in the squid giant axon requires voltage-gated potassium channels. Describe the shape of the action potential if these channels are blocked using TEA (Tetraethylammonium).
Which best describes the process by which rod cells are activated? light strikes a rod cell at resting membrane potential K* channels open → hyperpolarization of rod stops release of an inhibitory neurotransmitter В. A. light strikes a rod cell at resting membrane potential Na channels open → depolarization of rod leads to an action potential С. light strikes a depolarized rod cell Nat channels open hyperpolarization of rod stops release of an inhibitory neurotransmitter light strikes a depolarized rod cell K* channels open hyperpolarization of rod stops release of an inhibitory neurotransmitter light strikes a depolarized rod cellNat channels close stops release of an inhibitory neurotransmitter D. Е. hyperpolarization of rod >
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