Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 15, Problem 15RQ
What gland produces a secretion that causes fight-or flight responses in effectors?
- adrenal medulla
- salivatory gland
- reproductive gland
- thymus
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For each FALSE statement, explain why it is incorrect.
Which of the following is comparable to a negative feedback cycle?
opening of voltage-gated Na" channels in response to a depolarizing graded potential
movement of K* through leak channels
opening of voltage-gated K* channels in response to a depolarizing graded potential
operation of the Na -K ATPase at rest
opening of voltage-gated Ca- channels in response to an action potential arriving at the axon terminal
Which of the following describes the axon hillock?
Part of neuron that passes nerve impulses to another cell
Part of neuron that connects the axon to the neuron cell body
Part of neuron that stores neurotransmitters
Endoplasmic reticulum of the neuron
Part of neuron that gives rise to axon collaterals
Chapter 15 Solutions
Anatomy & Physiology
Ch. 15 - Watch this video...Ch. 15 - Watch this video...Ch. 15 - Read this article...Ch. 15 - Watch this video...Ch. 15 - Watch this video...Ch. 15 - Watch this video...Ch. 15 - Which of these physiological changes would not be...Ch. 15 - Which type of fiber could be considered the...Ch. 15 - Which signaling molecule is most likely...Ch. 15 - Which of these cranial nerves contains...
Ch. 15 - Which of the following is not a target of a...Ch. 15 - Which of the following represents a sensory input...Ch. 15 - What is the term for a reflex that does not...Ch. 15 - What neurotransmitter will result in constriction...Ch. 15 - What gland produces a secretion that causes...Ch. 15 - Which of the following is an incorrect pairing?...Ch. 15 - Which of these locations in the forebrain is the...Ch. 15 - Which nerve projects to the hypothalamus to...Ch. 15 - What region of the limbic lobe is responsible for...Ch. 15 - What is another name for the preganglionic...Ch. 15 - What central fiber tract connects forebrain and...Ch. 15 - A drag that affects both divisions of the...Ch. 15 - A drug is called an agonist if it ________. blocks...Ch. 15 - Which type of drug would be an antidote to...Ch. 15 - Which kind of ding would have anti-anxiety...Ch. 15 - Which type of drug could be used to treat asthma...Ch. 15 - In the context of a lioness hunting on the...Ch. 15 - A target effector, such as the heart, receives...Ch. 15 - Damage to internal organs will present as pain...Ch. 15 - Medical practice is paying more attention to the...Ch. 15 - Horners syndrome is a condition that presents with...Ch. 15 - The cardiovascular center is responsible for...Ch. 15 - Why does smoking increase the risk of heart...Ch. 15 - Why might topical, cosmetic application of...
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- What 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_forwardIf a graded receptor potential made the resting membrane potential of the axon more negative, you would expect: Subsequent action potentials to be reduced in their amplitude It to be easier for this axon to reach threshold voltage It to be more difficult for this axon to reach the threshold voltage Subsequent action potentials to be shorter in duration No change in the ability of this axon to reach threshold voltagearrow_forwardParkinson's Disease Parkinson's disease is neurodegenerative disorder that affects movement. Most people affected with Parkinson's disease demonstrate rigidity, slow movement, and shaking. The symptoms of Parkinson's disease occur when the cells that produce dopamine neurotransmitters die in the brain. Explain how the signal transmission at a synapse in an individual with Parkinson's disease is different than an unaffected individual. Describe the normal process of signal transmission at a synapse. Start with the arrival of an action potential at the axon terminal and include the name of the neurotransmitter that is affected by Parkinson's disease. Explain how the process is different in individuals affected with Parkinson's disease.arrow_forward
- How does lidocaine cause numbness when injected? destroys pain receptors repolarizes sensory axons blocks effectors from reaching threshold prevents voltage gated channels from openingarrow_forwardExplain the difference between slow and fast chemical transmission. Fig. 8.23arrow_forwardWhat is responsible for action potentials propagating in one direction? The inactivation of voltage gated sodium channels The sodium potassium pump and the potassium leak channels The inactivation of voltage gated potassium channels The inactivation of ligand gated sodium channels The inactivation of ligand gated potassium channelsarrow_forward
- Dopamine is a major neurotransmitter in the mammalian brain that regulates mood, cognition and locomotion. Which of the following are true about dopamine signaling in the synapse? Select all that apply. Presynaptic nerve cell Dendrites Axon Nerve impulse Myelin sheath Nerve impulse Neuro- transmitter Synapse Postsynaptic nerve cell Postsynaptic receptors Dopamine receptors are localized in the presynaptic membrane Action potential in presynaptic axon terminal results in the opening of chloride channels Dopamine receptors are localized in the postsynaptic membrane Action potential in presynaptic axon terminal results in the opening of calcium channelsarrow_forwardOrder the following in the correct sequence that results in generation of action potential local potential is generated at axon hillock action potential may or may not result in subsequent post synaptic neuron depending on type of neurotransmitter and receptors etc. stimulus is picked up by dendrites If the potential reaches a threshold, action potential spreads throughout the axon signal then reaches synaptic knob, which releases neurotrasmitters A Moving to another question will save this response. « < Question 51 17 étv 80 DII DD F2 F3 F4 F5 F9 F10 23 24 2 3 4 5 6 7 8. 10 R T Y S. D J K C V * COarrow_forwardHow do ACh neurotransmitters cause the “second action potential” as shown in this diagram?arrow_forward
- Which of the following combinations of spatial summation of postsynaptic potentials (PSP) would result in an action potential in a typical neuron? The voltage given for each PSP is measured as it reaches the axon hillock. Axon A EPSP 25 mV & axon B IPSP 10 mV Axon A IPSP 25 mV & axon B EPSP 10 mV Axon A IPSP 5 mV & axon B IPSP 5 mV Axon A EPSP 5 mV & axon B EPSP 5 mVarrow_forwardcan you help me with these questions please, im studying for an exam.arrow_forwardWhich is not true about axons? They arise from the cell body they send information to other cells they contain dendritic spines they recive information from other cellsarrow_forward
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