Master A And P Chapter 16

24 July 2022
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The ________ division of the autonomic nervous system is said to function during "rest and digest."
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Parasympathetic
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The sympathetic division of the ANS is also known as
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thoracolumbar division
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Preganglionic neurons of the autonomic nervous system are located in
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Both the brain and the lateral gray horns of the spinal cord
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Ganglionic neurons innervate all of the following except smooth muscle. glands. cardiac muscle. adipose tissue. skeletal muscle.
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skeletal muscle.
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The parasympathetic nervous system is especially active during which physiological state?
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Digestion
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The parasympathetic division is also called the ________ division.
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craniosacral division
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Which anatomical description is TRUE of the sympathetic division of the autonomic nervous system?
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Its innervation originates mainly in the thoracic segment of the spinal cord.
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Which of the following statements accurately reflects a difference between ganglia in the sympathetic and parasympathetic divisions?
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Ganglia of the sympathetic division are located near the spinal cord, but ganglia of the parasympathetic division are located in or near the target organ.
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Which anatomical description is true of the parasympathetic division of the autonomic nervous system?
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The preganglionic fibers and postganglionic fibers synapse in the ganglia, which are located in the tissues of the target organs.
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Which of the following enzymes are important in the deactivation of cAMP and termination of signaling?
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phosphodiesterase
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A pedestrian narrowly avoids being hit by an oncoming car. He notices that it takes a little while for his heart rate and respiratory rate to return to normal. This is likely because
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sympathetic activation of the adrenal medulla has released epinephrine and norepinephrine into the bloodstream.
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Preganglionic neurons of the sympathetic nervous system are located in the
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Lateral gray horns of segments T1-L2 of the spinal cord
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Injury to the neurons of a collateral ganglion would affect the function of the
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digestive tract
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The adrenal medullae secrete
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both epinephrine and norepinephrine
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Autonomic disorders would not cause
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problems related to skeletal muscle function
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As the result of an accident, the white rami communicantes of spinal nerves T1 and T2 on the left side of Brad's body are severed. What organ(s) would you expect to be affected by this injury?
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left pupil and heart
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In what part of the given pathway is norepinephrine secreted?
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From the varicosities of the postganglionic fiber
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Drugs known as beta-blockers may be useful for treating
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excessive heart rate
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Drugs that have effects similar to those of sympathetic activation are called sympathomimetic drugs. Which of the following would you not expect to observe in a person who has taken a sympathomimetic drug?
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decreased blood pressure
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Stimulation of the beta receptors on heart muscle cells results in
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Increased heart rate and force of contraction
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An inhaler used to treat airway constriction in asthma or allergy might contain a drug that
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activates Ξ²2 adrenergic receptors
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Most sympathetic effector junctions release norepinephrine but a significant number release acetylcholine instead. Which of these is an example of an organ of the cholinergic type?
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a sweat gland
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If the receptor on the postsynaptic membrane binds to norepinephrine, the synapse is called
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adrenergic.
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Which of these substances is NOT a neurotransmitter at a sympathetic effector synapse?
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gamma amino butyric acid (GABA)
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During an asthma attack, inhalers are used to dilate respiratory passages, making breathing easier. What type of adrenergic membrane receptor is targeted to cause this reaction?
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beta-2 receptor
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Where are the parasympathetic ganglionic synapses for the heart located?
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within the heart itself
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Disorders involving the vagus nerve might cause
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food to remain in your stomach longer.
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Preganglionic fibers of parasympathetic neurons are present in all of the following cranial nerves except
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XII.
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Almost 75 percent of all parasympathetic outflow travels along the ________ nerve(s).
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vagus nerves.
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Parasympathetic functions include all of the following, except constriction of the pupils. dilation of the airways. stimulation of urination. decrease in the rate of cardiac contraction. stimulation of defecation.
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dilation of the airways.
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Parasympathetic stimulation
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increases gastric motility.
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The statement "Its postganglionic axons always use acetylcholine as the neurotransmitter" is
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true only for the parasympathetic nervous system.
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Nicotinic receptors
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open chemically-gated sodium ion channels
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Muscarinic receptors
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are normally activated by acetylcholine
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The statement "Preganglionic axon terminals release acetylcholine" is
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true for both the parasympathetic and sympathetic nervous systems
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Nicotine poisoning differs from muscarine poisoning in that
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it causes skeletal muscle convulsions
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Parasympathetic blocking agents can be useful in treating
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urinary incontinence.
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A doctor places drops in the eyes to dilate the pupils for an examination. The type of drug that is used is a(n) ________ drug. 1. sympathomimetic 2. parasympathomimetic 3. adrenergic activating 4. cholinergic activating
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sympathomimetic and adrenergic activating
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Mary accidentally ate poisonous mushrooms that contain muscarine. You would expect to observe all of the following symptoms except sweating. diarrhea. very fast heart rate. salivation. low blood pressure.
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very fast heart rate.
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Which of these organs does NOT receive parasympathetic input?
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skin
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The parasympathetic nervous system releases __________ at ganglionic synapses and __________ at its neuroeffector junctions.
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Acetylcholine; acetylcholine
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Control of the diameter of the respiratory passages depends upon
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both parasympathetic and sympathetic levels of stimulation.
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Autonomic tone is an important aspect of ANS function because it
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allows ANS neurons to increase or decrease their activity, providing a range of control options.
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A decrease in the autonomic tone of the smooth muscle in a blood vessel would result in
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an increase in blood flow through the vessel
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Which of the following would be an example of higher-level control of autonomic function?
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increased heart rate when you see a person you fear
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Insomnia is considered a sleep disorder. Sleep technicians use a variety of techniques to determine the underlying cause(s) of this condition in an insomniac. Which of the following is NOT one of the causes of insomnia?
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amnesia
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One possible way to categorize nervous system disorders is to check levels of neurotransmitters. What degenerative disorder is partly identified by the progressive loss of dopamine?
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Parkinson's Disease
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Increased vagal tone slows down the heart rate and subsequent reduction of blood flow to the brain. Which neurotransmitter is responsible for lowering the heart rate?
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ACh
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What is the medical term for fainting?
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syncope
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Which of the following is essential for memory consolidation?
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hippocampus
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Mechanisms involved in memory formation and storage involve all of the following except the formation of memory engrams. facilitation at synapses. increased release of neurotransmitters. anterograde amnesia. the formation of additional synaptic connections.
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anterograde amnesia
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Long-term memories that are with you for a lifetime are called ________ memories.
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Tertiary
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Most long-term memories are stored in the
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cerebral cortex
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For minor surgical procedures, Valium is typically given to patients to cause anterograde amnesia. This means the patient will temporarily
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forget memories from during and immediately after surgery.
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Which of the following is an inherited disease characterized by destruction of ACh-secreting and GABA-secreting neurons in the basal nuclei causing difficulty controlling movements?
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Huntington's disease
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Conversion of a short-term memory to a long-term memory is called
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memory consolidation.
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The conscious state is maintained by the
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reticular activating system
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A state of unconsciousness in which an individual cannot be aroused even by strong stimuli is
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coma
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The brain waves produced by normal adults while resting with their eyes closed are ________ waves.
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alpha
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The regulation of awake-asleep cycles appears to involve an interplay between brain stem nuclei that use different neurotransmitters. The one that favors alertness is ________ and the other promoting deep sleep is ________.
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norepinephrine; serotonin
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During ________ sleep, dreaming occurs.
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REM
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Hallucinogenic drugs, such as LSD, function by
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stimulating serotonin receptors
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The inherited brain disorder Huntington's disease is caused by the destruction of basal nuclei that use different neurotransmitters. One neurotransmitter is ________ and the other is ________.
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acetylcholine; GABA
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What mental illness is often improved by drugs that block serotonin re-uptake?
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depression
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Terry has recently been diagnosed with an inherited form of depression. Which of the following is the most likely cause for the depression?
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Terry has a mutation in the enzyme involved in NE synthesis.
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Brain dopamine levels are important in all of these EXCEPT __________.
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Huntington disease