Impulses: Activity 9: The Action Potential: Putting It All Together Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Sensory neurons respond to an appropriate sensory stimulus with a change in membrane potential that is You correctly answered: b. graded with the stimulus intensity. 2. If the depolarization that reaches the axon is large and suprathreshold‚ the result in the axon is You correctly answered: c. action potentials at higher frequency
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Test 3 Chapter 51: 1‚ 2‚ 5‚ 7 1. Most of the metabolic energy needed by a bird for a long-distance migratory flight is stored as a. glycogen. b. fat. c. protein. d. carbohydrates. e. ATP. 2. Which statement about essential amino acids is true? a. They are not found in vegetarian diets. b. They are stored by the body until they are needed. c. Without them‚ one is undernourished. d. All animals require the same ones. e. Humans can acquire all of theirs by eating milk‚ eggs‚ and meat
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and list the components of a reflex arc. Receptor‚ Sensory neuron‚ Integration‚ Motor neuron‚ and Effector. Somatic reflexes activate skeletal muscle and autonomic reflexes activate smooth or cardiac muscle 2. Describe the events of an action potential. During the action potential part of the neural membrane opens to let + charged ions in the cell and let – charged ions out. This causes a rapid increase in positive nerve fiber. 3. What is presbyopia? An age related disease that makes
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node (atrioventricular node) _E__ gap junctions _G__ action potential generated by ventricular myocytes _H__ functions as the pacemaker of the whole heart _D__ calcium _C__ Bachmann’s bundle _A__ Bundle of His _B__ action potential generated by pacemakers Prof. Beyenbach VRT 8014 A. ventricular conduction system that distributes the action potential arriving at the AV node B. slow response action potential C. mediates the atrial action potential from right to left atrium. D. primary mediator of
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Nerve & Muscle Important Solved SEQs By Medical Study Center Ref: Guyton Q.1. a). What is saltatory conduction? Enlist its advantages? 1+1 marks b). briefly mention the three determinants of resting membrane potential. 3 marks Ans: Q.1.a. SATTATORY CONDUCTION: 1 mark Propagation of action potential along a myelinated nerve fiber from one node of Ranvier to other in jumping manner is called as saltatory conduction. r Node to node conduction. Also called saltatory / jumping conduction. All ion channels
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agents produce‚ called fasciculation‚ are forceful enough to be seen. During the second phase‚ muscles stop responding to acetylcholine‚ proving that neuromuscular blockade is in effect. When depolarizing agents are used‚ they still prompt the action potential to occur; this means that the neurons will still send information. (Source) However‚ even though the neurons are still working‚ the depolarizing agent causes the effector site to become desensitized‚ allowing the block to be successful. In comparison
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PSYCH STUDY GUIDE Neonatal Reflexes: Babinsk: big toe lifts‚ other toes fan out Moro Reflex: arms fling out and grab something when child feels like he’s falling Palmer Grasp: touch a baby’s palms and his hand closes Planter Grasp Sucking- doesn’t need to learn how to breast feed Rooting Withdrawal – reaction to pain Vigotsky’s Theory Focuses more on cultural impact on human development Believed children actively seek to discover new principles (like Piaget) Zone of proximal
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singal integration‚ it consists of the axon hillock. The signals transmitted from the first zone is integrated in this region. If the signal is strong enough‚ an action potential would be initiated. Third zone is specialized for signal conduction‚ it consists of the axon. The axon carries the information‚ usually from action potentials‚ from the cell body to the axon terminal. The fourth zone of a neuron is for signal transmission to target cells‚ it consists of the axon terminals. These axon terminals
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stimulation on a frog’s sciatic nerve by looking at its compound action potential‚ the conduction velocity‚ and by quantifying the total and absolute refractory period between the nerve at room and cold temperature. An oscilloscope‚ preamplifier‚ and stimulator were used to stimulate the frog’s nerve located in the nerve chamber. Threshold voltage was determined by stimulating the nerve at increasing voltages until a compound action potential resulted. Absolute threshold was determined similarly by increasing
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Impulse 1. Why don’t the terms depolarization and action potential mean the same thing? They require different things. Action potential requires depolarization and repolarization. Depolarization doesn’t require anything. 2. What was the threshold voltage in Activity 1? 3.0V 3. What was the effect of increasing the voltage? How does this change correlate to changes in the nerve? The action potential increases. 4. How did the action potential generated with the unheated rod compare to the
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