Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 33, Problem 2TY
Summary Introduction
Introduction:
A neuron or a nerve cell is the basic functional and structural unit of the nervous system. It is responsible for the transmission of stimulus between different body parts and the central nervous system. The stimulus is transmitted either through electrical signals or through chemical signals (via neurotransmitters) and is received via ion gated channels.
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Which part of the neuron provides insulation for the neurons, to prevent the loss of
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Which of the following neuron structure - function parings is incorrect?
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Chapter 33 Solutions
Principles of Biology
Ch. 33.1 - Which of the following is false? The CNS of...Ch. 33.1 - Prob. 2TYKCh. 33.1 - Prob. 1CCCh. 33.2 - Prob. 1CCCh. 33.2 - Prob. 1BCCh. 33.2 - Prob. 1TYKCh. 33.2 - The resting membrane potential occurs because the...Ch. 33.3 - Are ions the only substances that can move through...Ch. 33.3 - Prob. 1CCCh. 33.3 - Prob. 2CC
Ch. 33.3 - Which is false? Graded potentials may die out or...Ch. 33.3 - Action potentials require a threshold potential...Ch. 33.4 - Prob. 1CCCh. 33.4 - Prob. 1TYKCh. 33.4 - Prob. 2TYKCh. 33.5 - Prob. 1BCCh. 33.5 - Prob. 1TYKCh. 33.5 - Prob. 2TYKCh. 33.6 - Prob. 1CCCh. 33.6 - Prob. 2CCCh. 33.6 - Prob. 3CCCh. 33.6 - Prob. 1TYKCh. 33.6 - Prob. 2TYKCh. 33.7 - Prob. 1TYKCh. 33.7 - Therapeutic drugs that reduce symptoms of...Ch. 33 - Prob. 1TYCh. 33 - Prob. 2TYCh. 33 - Prob. 3TYCh. 33 - Neurons that function mainly in connecting other...Ch. 33 - Prob. 5TYCh. 33 - Prob. 6TYCh. 33 - Prob. 7TYCh. 33 - Prob. 8TYCh. 33 - Prob. 9TYCh. 33 - Prob. 10TYCh. 33 - Describe the differences between graded and action...Ch. 33 - Prob. 2CCQCh. 33 - Prob. 3CCQCh. 33 - Prob. 1CBQCh. 33 - Prob. 2CBQ
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- Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c. dendrites d. Golgibodiesarrow_forwardWhat causes Hyperpolarization following the spike of the action potential? Voltage-gated K+ channels close slowly allowing K+ ions to leave the cell The opening of leaky Na+ channels The Na+/K+ pump briefly reverses the direction of ion flow Both Na+ channels and K+ channels become inactivated Na+ and Cl- enter the cell until the Na+/Cl- pump closesarrow_forwardWhich cell type assists in the reuptake of a neurotransmitter, such GABA after released in the synapse? pyramidal cells ependymal cells glial cells oligodendrocytesarrow_forward
- What happens to sodium channels and potassium channels during repolarization of a neuron? both potassium channels and sodium channels remain closed the sodium channels close, followed by opening of the potassium channels both sodium channels and potassium channels remain closed the sodium channels open, but the potassium channels remain closed both potassium channels and sodium channels remain openarrow_forwardWhat membrane protein of the neuron is responsible for briefly increasing the Na+ permeability of the membrane during the rising phase of the nerve impulse? the sodium-potassium pump the voltage gated potassium channel the voltage gated sodium channel the stimulus gated sodium channel the ligand gated ion channelsarrow_forwardWhich statement(s) regarding ions is true when a neuron is at rest? Positively charged cations are attracted to the intracellular fluid Positively charged anions are attracted to the intracellular fluid Negatively charged anions are drawn to the intracellular fluid Negatively charged anions are balanced across the cell membranearrow_forward
- Which of the following are the likely explanations for the failure of a postsynaptic neuron to trigger an action potential? Select all that apply. The EPSPs are neutralized by the neurotransmitter The summation of IPSPs and EPSPs is insufficient to depolarize the cell to threshold The synapses generating the EPSPs are too close to the axon hillock The synapses generating the EPSPs are too far from the axon hillockarrow_forwardWhich of the following takes place during an action potential? Na+ ions exit the cell causing depolarization Repolarization occurs when K+ ions enter the cell The membrane becomes more negative during depolarization K+ ions start the action potentials Na+ enters the cell making the membrane potential positive.arrow_forwardWhich of the following statements is not true about neurons? When there is no active nerve impulse, the concentration of Na+ ions outside of the cell is greater than inside the cell After a nerve impulse passes a region of the axon, that region will not be able to carry another impulse again for a brief period of time When a nerve impulse occurs, sodium channels in the axon open first, followed by potassium channels The inside of an axon is typically negatively charged compared to the outside of an axon The cell uses energy to actively pump Na+ ions into the axon and K+ ions out of the axon.arrow_forward
- If the neuron is stimulated such that its membrane potential changes to 50 mV, what is the sign of the driving force for Cl- ions and in which direction will these ions move across the membrane? Positive driving force; Cl- moves into the cell Positive driving force; Cl- moves out of the cell Negative driving force; Cl- moves into the cell Negative driving force; Cl- moves out of the cellarrow_forwardYou can choose one or more than one option About neuronal excitability, what are the correct statements? Neurons communicate via action potential and synapses The action potential is characterized by the rapid inversion of the membrane potential from negative to positive values Synaptic vesicles contain neurotransmitters that are secreted in a calcium-dependent process Ligand-gated neurotransmitter receptors are membrane protein ion channels Voltage-gated potassium channels are responsible for the depolarization phase of the action potentialarrow_forwardWhich neuron will conduct impulses most rapidly? Neurons with large diameter unmyelinated axons O Neurons with small diameter unmyelinated axons Neurons with large diameter myelinated axons O Neurons with small diameter myelinated axonsarrow_forward
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