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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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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pathway involved in a reflex action including at its simplest a sensory nerve and a motor nerve with a synapse between. The components are receptor‚ sensory neurons‚ motor neurons‚ relay neurons‚ and effector. 2. Describe the events of an action potential. The events that take place are that the motor neuron will be stimulated. At the axon hillock‚ this will cause Na+ to rush into the axon‚ triggering an action potential. Once that happens then the action potential will propagate down the axon
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first saw an action potential? 3.0 V 3. How does this tracing compare to the one that was generated at the threshold voltage? The tracing travel in the same fashion but the tracing were different with an increase threshold voltage 4. What reason can you give for the change? Increase voltage 5. Record this maximal voltage here: 6.0 V Activity 2: Mechanical Stimulation 1. When the glass rod is touching the nerve‚ what do you see on the oscilloscope screen? The nerve’s action potential to stimuli
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consists of many areas that all work together in unison in order for the body to perform the tasks it is told to perform. The brain is responsible for controlling both voluntary and involuntary actions and coordinates and controls other organs in the body. The brain can do this by the use of postsynaptic potentials‚ synaptic transmission‚ and receptors that are responsible for producing and regulating specific behaviors. There are also six primary neurotransmitters that play a large role in how an individual
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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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voltage across membrane: the rmp - an AP abolishes the –ve rmp‚ making membrane potential transiently positive - we can record and measure ion currents using electrophysiology - hyperpolarization is usually the movement of +ve ions moving outward‚ but it can also be the movement of –ve ions moving inward; while depolarization is the opposite How do these membrane potentials arise? - electrical signals are generated through action of ion channels by opening and closing - the membrane bi-layer is impermeable
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1. A. Homeostasis is defined as a condition of equilibrium in the body internal environment. For example the internal organs‚ behaviors‚ body temperatures. In homeostasis it can be considered as dynamic as it is always changing. The liver‚ kidneys‚ autonomic nervous system and endocrine system‚ and hypothalamus help maintain homeostasis. For example‚ my brother has imbalance homeostasis due to having seizures. Because his brain is not functioning correctly‚ his homeostasis is not balance. B. Medial
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correctly answered: a. one contractile response to a single action potential. 010/17/12 page 1 Experiment Results Predict Question: Predict Question: Will changes to the stimulus voltage alter the duration of the latent period? Your answer : a. Yes‚ changing the stimulus voltage will change the latent period duration proportionately. Stop & Think Questions: What is the period of time that elapses between the generation of an action potential and the start of muscle tension development in a muscle
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Part 1 of 17 - 1.67/ 5.0010004 Points Question 1 of 60 0.0/ 1.667 Points All of the following belong to feedback systems which control homeostasis EXCEPT A. All of the above are basic components of the feedback system. B. control center. C. receiver. D. receptor. E. effector. Answer Key: C Feedback: Please review chapter 1. Question 2 of 60 0.0/ 1.667 Points Group of related organs that have a common function is called a(n) A. organ.
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