HUMAN ANATOMY
6th Edition
ISBN: 9781260210262
Author: SALADIN
Publisher: RENT MCG
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Textbook Question
Chapter 13, Problem 2TYC
How would nervous system function be affected if both the presynaptic and postsynaptic neurons at every had both synaptic vesicles and neurotransmitter receptors?
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Watch this video (http://openstaxcollege.org/l/summation) to learn about summation. The process of converting electrical signals to chemical signals and back requires subtle changes that can result in transient increases or decreases in membrane voltage. To cause a lasting change in the target cell, multiple signals are usually added together, or summated. Does spatial summation have to happen all at once, or can the separate signals arrive on the postsynaptic neuron at slightly different times? Explain your answer.
What adaptive advantage do synapses provide in nervoussystems (i.e., why isn’t the nervous system just a mesh of cellscytoplasmically connected through gap junctions)?
In the central nervous system there may be many synaptic inputs on a postsynaptic neurons. How does the postsynaptic neuron respond to the many presynaptic inputs?
Chapter 13 Solutions
HUMAN ANATOMY
Ch. 13.1 - Define receptor and effector. Give two examples of...Ch. 13.1 - Prob. 2BYGOCh. 13.1 - Prob. 3BYGOCh. 13.2 - What basic physiological properties do a nerve...Ch. 13.2 - Prob. 2AWYKCh. 13.2 - Prob. 4BYGOCh. 13.2 - Prob. 5BYGOCh. 13.2 - Prob. 6BYGOCh. 13.2 - Prob. 7BYGOCh. 13.3 - From memory, make your own table of the six kinds...
Ch. 13.3 - Prob. 9BYGOCh. 13.3 - Compare the signal conduction speed in myelinated...Ch. 13.3 - Prob. 11BYGOCh. 13.4 - Of all the methods of membrane transport described...Ch. 13.4 - Prob. 12BYGOCh. 13.4 - Prob. 13BYGOCh. 13.4 - Prob. 14BYGOCh. 13.4 - Prob. 15BYGOCh. 13.4 - Prob. 16BYGOCh. 13.4 - Prob. 17BYGOCh. 13.5 - Prob. 18BYGOCh. 13.5 - Prob. 19BYGOCh. 13.5 - What single adult structure arises from all five...Ch. 13.5 - Prob. 21BYGOCh. 13 - The body’s two principal mechanisms of internal...Ch. 13 - Prob. 13.1.2AYLOCh. 13 - The two divisions of the PNS and the two...Ch. 13 - Prob. 13.1.4AYLOCh. 13 - Prob. 13.2.1AYLOCh. 13 - Prob. 13.2.2AYLOCh. 13 - Prob. 13.2.3AYLOCh. 13 - Prob. 13.2.4AYLOCh. 13 - Prob. 13.3.1AYLOCh. 13 - Prob. 13.3.2AYLOCh. 13 - Prob. 13.3.3AYLOCh. 13 - The structure, composition, and function of the...Ch. 13 - The relationship of Schwann cells to the myelin,...Ch. 13 - Prob. 13.3.6AYLOCh. 13 - Prob. 13.3.7AYLOCh. 13 - How the velocity of a nerve singnal varies with a...Ch. 13 - Prob. 13.3.9AYLOCh. 13 - Prob. 13.4.1AYLOCh. 13 - Prob. 13.4.2AYLOCh. 13 - Three types of synapses defined by where the...Ch. 13 - Prob. 13.4.4AYLOCh. 13 - Prob. 13.4.5AYLOCh. 13 - Prob. 13.4.6AYLOCh. 13 - Prob. 13.4.7AYLOCh. 13 - Prob. 13.4.8AYLOCh. 13 - Prob. 13.4.9AYLOCh. 13 - Prob. 13.4.10AYLOCh. 13 - The four principal types of neural circuits...Ch. 13 - Prob. 13.5.1AYLOCh. 13 - Prob. 13.5.2AYLOCh. 13 - Prob. 13.5.3AYLOCh. 13 - Prob. 13.5.4AYLOCh. 13 - Prob. 13.5.5AYLOCh. 13 - Prob. 13.5.6AYLOCh. 13 - The integrative functions of the nervous system...Ch. 13 - Prob. 2TYRCh. 13 - Prob. 3TYRCh. 13 - Prob. 4TYRCh. 13 - Prob. 5TYRCh. 13 - Prob. 6TYRCh. 13 - Another name for the axon of a neuron is nerve...Ch. 13 - Prob. 8TYRCh. 13 - Prob. 9TYRCh. 13 - Which of the following appears earlier than all...Ch. 13 - Prob. 11TYRCh. 13 - Prob. 12TYRCh. 13 - Prob. 13TYRCh. 13 - Neurons receive incoming signals by way of...Ch. 13 - Prob. 15TYRCh. 13 - Prob. 16TYRCh. 13 - Prob. 17TYRCh. 13 - Prob. 18TYRCh. 13 - Prob. 19TYRCh. 13 - Prob. 20TYRCh. 13 - Prob. 1BYMVCh. 13 - Prob. 2BYMVCh. 13 - State a meaning of each word element and give a...Ch. 13 - Prob. 4BYMVCh. 13 - Prob. 5BYMVCh. 13 - Prob. 6BYMVCh. 13 - Prob. 7BYMVCh. 13 - Prob. 8BYMVCh. 13 - Prob. 9BYMVCh. 13 - Prob. 10BYMVCh. 13 - Briefly explain why each of the following...Ch. 13 - Prob. 2WWWTSCh. 13 - Prob. 3WWWTSCh. 13 - Briefly explain why each of the following...Ch. 13 - Briefly explain why each of the following...Ch. 13 - Briefly explain why each of the following...Ch. 13 - Prob. 7WWWTSCh. 13 - Briefly explain why each of the following...Ch. 13 - Prob. 9WWWTSCh. 13 - Briefly explain why each of the following...Ch. 13 - Suppose some hypothetical disease prevented the...Ch. 13 - How would nervous system function be affected if...Ch. 13 - What unusual characteristic of neurons can be...Ch. 13 - Prob. 4TYCCh. 13 - Prob. 5TYC
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- For the nervous system to convey information using electrical signals, the signals typically must be passed from one neuron to another. Oftentimes, this transfer of information across the synapse occurs via the release of neurotransmitters from the pre-synaptic terminal. When a large stimulus is detected in one neuron, it often conveys this information by releasing a larger amount of neurotransmitter into the synapse.arrow_forwardSchwann cells are a type of glial cell found in the nervous system. In addition to the conduction of nerve impulses, the outermost layer called neurilemma aids in nerve development and regeneration. Which of the following explains why the neurons in the brain cannot repair damage like the neurons in your hands or feet can?arrow_forwardWhy is that if A, B, and D neurons were all activated, an action potential in neuron C would not occur. But if A and D were activated, an action potential in C would occur?arrow_forward
- What is the function of neuroglial cells in the nervous system?arrow_forwardWhy does a given type of neurotransmitter affect onlycertain types of cells? How can a neurotransmitterstimulate one type of cell but inhibit another type?arrow_forwardWhich of the following statements about action potentials and information transmission in the synaptic cleft is FALSE? 1. Action potentials determine the amount of neurotransmitters that are released into the synaptic cleft 2.Action potentials ultimately result in more calcium leaving the target cell at the postsynaptic membrane 3. Action potentials determine the duration that neurotransmitters are released into the synaptic cleft 4. Action potentials ultimately result in more calcium entering the neuron at the axon terminalarrow_forward
- Explain what happens when an action potential reaches the axon terminus (terminal) by activating the receptors on the postsynaptic membrane. Explanation addressing the question above When an action potential, or nerve impulse, arrives at the axon terminal, it activates voltage-gated calcium channels in the cell membrane. Which is present at a much higher concentration outside the neuron than inside, rushes into the cell. The Ca2+ allows synaptic vesicles to fuse with the axon terminal membrane, releasing neurotransmitters into the synaptic cleft. The molecules of neurotransmitters diffuse across the synaptic cleft and bind to receptor proteins on the postsynaptic cell. Activation of postsynaptic receptors leads to the opening or closing of ion channels in the cell membrane. This may be depolarizing, making the inside of the cell more positive, or hyperpolarizing making the inside more negative depending on the ions involved. The excitatory and inhibitory postsynaptic potentials…arrow_forwardYou are investigating the effects of a newly discovered cell type. You have an intact synapse (including pre- and post-synaptic neurons) in a dish and observe what happens upon electrical stimulation. Following electrical stimulation of the pre-synaptic neuron, you record an action potential in the pre-synaptic neuron and an EPSP in the post-synaptic neuron. The synapse most likely utilizes which of the following neurotransmitters? Sodium (Na++) GABA Calcium (Ca++) Glutamatearrow_forwardWhat is the difference between a neuron and a glial cell in the nervous system?arrow_forward
- What are the main functions of the sensory-somatic nervous system?arrow_forwardWhy do neurotransmitters have to be removed from the synapse?arrow_forwardThe backflow of a nerve impulse is prevented by the fact that at a chemical synapse, the axon terminal does not have neurotransmitter receptors and dendrites cannot secrete neurotransmitter chemicals. What does this statement tell you about the direction of nerve impulses in neurons?arrow_forward
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