Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 13, Problem 5SQ
The accelerating flow of _______ ions through gated channels across the membrane triggers an action potential.
- a. potassium
- b. sodium
- c. hydrogen
- d. a and b
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Students have asked these similar questions
In the membrane of a neuron, what happens during an IPSP? A. All the ion gates in the membrane close. B. The sodium gates open. C. The potassium or chloride gates open. D. All the ion gates in the membrane open.
Which one of these is an example of an excitatory postynaptic potential in a typical neuron?
a) A voltage change from -70mV to -70.5mV
b) A voltage change from +35mV to 0MV
c) A voltage change from 0mV to +0.35mV
d) A voltage change from -69.5mV to -70mV
A neuron may receive signals from thousands of synaptic terminals. What determines whether the receiving neuron will respond by transmitting a signal?
a. the concentration of transmitter inside the receiving neuron
b. the summation of excitatory and inhibitory signals received
c. the number of glial cells contact the receiving neuron
Chapter 13 Solutions
Human Biology (MindTap Course List)
Ch. 13 - Explain the difference between a sensory neuron,...Ch. 13 - What are the functional zones of a motor neuron?Ch. 13 - Define an action potential.Ch. 13 - What is a synapse? Explain the difference between...Ch. 13 - Explain what happens during synaptic integration.Ch. 13 - Prob. 6RQCh. 13 - Prob. 7RQCh. 13 - The nervous system senses, interprets, and issues...Ch. 13 - A neuron responds to adequate stimulation with...Ch. 13 - When action potentials arrive at a synapse between...
Ch. 13 - In the simplest kind of reflex______, directly...Ch. 13 - The accelerating flow of _______ ions through...Ch. 13 - Prob. 6SQCh. 13 - Prob. 7SQCh. 13 - Cerebrospinal fluid _____. a. fills cavities and...Ch. 13 - Match each region of the central nervous system...Ch. 13 - Prob. 1CTCh. 13 - In newborns and premature babies, the bloodbrain...Ch. 13 - Prob. 3CT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c. dendrites d. Golgibodiesarrow_forward• Bundles of neurons that carry information to and from the central nervous system are called A. Nerves B. Interneurons C. Myelin sheath D. Glia • The attraction of the opposite charges across the plasma membrane is a potential energy, the charge difference, or the voltage is called _______________. A. Summation B. Membrane potential C. Resting potential D. Depolarizationarrow_forwardAt rest, a neuron has a lower concentration of sodium than the surrounding fluid. When a neuron sends a signal, it opens sodium channels. What happens to the sodium when the sodium channels open? A. The sodium diffuses out of the cell. B. The sodium is pumped into the cell. C. The sodium is pumped out of the cell. D. The sodium diffuses into the cell.arrow_forward
- A. the fact that one represents a depolarization and the other represents a hyperpolarization. B. the capacitive properties of the membrane. C. the difference in applied voltage.arrow_forwardNerve membrane hyperpolarization after an action potential a)Is the movement of membrane potential voltage below normal resting potential voltage. b) This Is mostly due to the slow-closing of K+ channels. c)Makes it more difficult to evoke another action potential. d) This Is mostly due to the slow-closing of Na+ channels.arrow_forwardWhere are neurotransmitter receptors located?(A) the nuclear membrane(B) the nodes of Ranvier(C) the postsynaptic membrane(D) synaptic vesicle membranesarrow_forward
- The presence of an electrical gradient is responsible for both the resting membrane potential and the action potential in the neuron.a. In this case who is responsible for maintaining the electric gradient to produce a potential for the resting membrane?b. Explain what is meant by an electrical gradient in the context of a cell (neuron)!arrow_forwardPost synaptic neurons membrane potentials are less negative than resting membrane potentials when this occur A. Creates a new set point for the resting membrane potential B. Has a lower propensity to produce an action potential C. Reacts by generating action potential D. Higher chance of reaching the potential thresholdarrow_forwardDuring the rising portion of the action potential, which ions are moving across the membrane and in which direction? A. Sodium ions move out. B. Sodium ions move in. C. Both sodium and potassium ions move in. D. Potassium ions move in.arrow_forward
- Assume a neuron's membrane potential is -60 mV, what's the net consequence on the membrane potential of a 5 picoamp (pA) sodium current that occurs simultaneously with a 5 pA chloride current? a. There's a 5 pA hyperpolarizing current b. There's a 10 pA depolarizing current c. There's a 10 pA hyperpolarizing current d. There's a 5 pA depolarizing current e. There's no change in the membrane potentialarrow_forwardA common feature of action potentials is that they(A) cause the membrane to hyperpolarize and then depolarize.(B) can undergo temporal and spatial summation.(C) are triggered by a depolarization that reaches threshold.(D) move at the same speed along all axons.arrow_forwardWhen summation of multiple graded synaptic potentials occurs which of the following would "neutralize/cancel out" an EPSP in dendrites? A. opening a voltage gated sodium channel B. opening a voltage gated calcium channel C. openning a ligand gated calcium channel D. closing a ligand gated potassium channel E. opening a ligand gated chloride channelarrow_forward
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