Chapter 14 (Lecture) Flashcards by Ashley M

The autonomic nervous system innervates

(a) skeletal muscle
(b) cardiac & smooth muscle
(c) skeletal muscle & glands
(d) skeletal & cardiac muscle

(b) cardiac & smooth muscle

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ANS effectors include all except

(a) glands
(b) smooth muscle
(c) cardiac muscle
(d) skeletal muscle

(d) skeletal muscle

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Somatic motor pathways use

(a) one neuron
(b) two neurons
(c) three neurons
(d) four neurons

(a) one neuron

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ANS preganglionic neurons release

(a) NE
(b) ACh
(c) dopamine
(d) serotonin

(b) ACh

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The ANS can produce inhibitory or excitatory effects depending on

(a) effector cell type
(b) receptor subtype
(c) neurotransmitter amount
(d) spinal level

(b) receptor subtype

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Visceral reflex arcs differ from somatic reflex arcs by

(a) no sensory neurons
(b) no motor neurons
(c) two motor neurons
(d) no integration center

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Dual innervation means

(a) somatic & autonomic nerves supply same organ
(b) sympathetic & parasympathetic supply same organ
(c) two spinal nerves supply one organ
(d) none of the above

(b) sympathetic & parasympathetic supply same organ

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The type of fiber that conducts fastest is

(a) thin unmyelinated ANS fibers
(b) preganglionic ANS fibers
(c) somatic motor fibers
(d) visceral sensory fibers

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Increased heart rate is caused by

(a) sympathetic division
(b) parasympathetic division
(c) somatic division
(d) enteric division

(a) sympathetic division

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Sympathetic fibers arise from

(a) craniosacral
(b) thoracolumbar
(c) cervicosacral
(d) lumbosacral

(b) thoracolumbar

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Sympathetic ganglia are located

(a) in effector organ walls
(b) near CNS
(c) only in head
(d) only in abdomen

(b) near CNS

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Sympathetic preganglionic fibers are

(a) long
(b) short
(c) absent
(d) sometimes sensory

(b) short

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The sympathetic trunks are also called

(a) chain ganglia
(b) terminal ganglia
(c) ciliary ganglia
(d) splanchnic ganglia

(b) terminal ganglia

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The “fight-or-flight” response includes all except

(a) pupil dilation
(b) increased HR
(c) increased digestion
(d) increased blood glucose

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White rami communicantes contain

(a) myelinated preganglionic fibers
(b) unmyelinated postganglionic fibers
(c) sensory fibers
(d) somatic motor fibers

(a) myelinated preganglionic fibers

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Gray rami communicantes contain

(a) preganglionic fibers
(b) postganglionic fibers
(c) sensory fibers only
(d) cholinergic fibers only

(b) postganglionic fibers

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Sympathetic responses generally

(a) decrease BP
(b) increase BP
(c) decrease HR
(d) increase digestion

(b) increase BP

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Splanchnic nerves carry sympathetic fibers that

(a) always synapse in trunk ganglia
(b) synapse in collateral ganglia
(c) go only to adrenal cortex
(d) innervate skeletal muscles

(b) synapse in collateral ganglia

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The adrenal medulla secretes

(a) ACh
(b) NE & EPI
(c) dopamine only
(d) serotonin

(b) NE & EPI

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The celiac ganglion is a

(a) terminal ganglion
(b) collateral ganglion
(c) chain ganglion
(d) somatic ganglion

(b) collateral ganglion

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Sympathetic activation of cutaneous blood vessels

(a) dilates them
(b) constricts them
(c) has no effect
(d) depends on parasympathetic input

(b) constricts them

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Sweat glands are innervated by

(a) parasympathetic system only
(b) sympathetic cholinergic fibers
(c) sympathetic adrenergic fibers only
(d) somatic motor fibers

(b) sympathetic cholinergic fibers

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Bronchodilation is caused by

(a) sympathetic fibers
(b) parasympathetic fibers
(c) somatic motor fibers
(d) enteric fibers

(a) sympathetic fibers

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Parasympathetic fibers arise from

(a) craniosacral regions
(b) thoracolumbar regions
(c) cervicothoracic regions
(d) sacrococcygeal regions

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(a) craniosacral regions

Parasympathetic preganglionic fibers are (a) short (b) long (c) absent (d) variable length

(b) long

Terminal ganglia are found (a) near effectors (b) near spinal cord (c) in sympathetic trunks (d) in dorsal root ganglia

(a) near effectors

Parasympathetic stimulation of the heart (a) increases HR (b) decreases HR (c) prevents contraction (d) increases contraction force

(b) decreases HR

Parasympathetic stimulation of bronchioles (a) dilates (b) constricts (c) no effect (d) destroys smooth muscle

(b) constricts

Parasympathetic effects on digestive tract (a) inhibit motility (b) stimulate motility (c) block secretions (d) constrict vessels only

(b) stimulate motility

Parasympathetic fibers leave the sacral cord via (a) rami communicantes (b) pelvic splanchnic nerves (c) white rami (d) ventral horns

(b) pelvic splanchnic nerves

Parasympathetic fibers do NOT innervate (a) heart (b) lungs (c) sweat glands (d) stomach

Parasympathetic fibers in CN VII control (a) parotid gland (b) submandibular gland (c) sweat glands (d) adrenal medulla

(b) submandibular gland

Parasympathetic fibers in CN III control (a) salivation (b) lacrimation (c) pupil diameter (d) taste

Parasympathetic tone dominates the (a) heart (b) blood vessels (c) adrenal medulla (d) arrector pili

(a) heart

Parasympathetic control constricts the pupil via (a) dilator pupillae (b) sphincter pupillae (c) ciliary muscle (d) tarsal muscle

(b) sphincter pupillae

Adrenergic fibers release (a) ACh (b) NE (c) dopamine (d) serotonin

(b) NE

Postganglionic sympathetic fibers are usually (a) cholinergic (b) adrenergic (c) dopaminergic (d) serotonergic

(b) adrenergic

Cholinergic fibers release (a) NE (b) ACh (c) dopamine (d) histamine

(b) ACh

Postganglionic parasympathetic fibers are (a) cholinergic (b) adrenergic (c) serotonergic (d) glycinergic

(a) cholinergic

Muscarinic receptors are found on (a) parasympathetic targets (b) sympathetic sweat glands (c) skeletal muscles (d) both a & b

(d) both a & b

Beta-2 activation causes (a) bronchodilation (b) bronchoconstriction (c) decreased HR (d) gland secretion

(a) bronchodilation

Alpha-1 receptors cause (a) vasodilation (b) vasoconstriction (c) no vascular effect (d) skeletal muscle contraction

(b) vasoconstriction

Nicotinic receptors are found on (a) all ganglionic neurons (b) skeletal muscle (c) adrenal medulla (d) all of the above

(d) all of the above

Beta-1 receptors mainly affect (a) lungs (b) heart (c) adipose tissue (d) liver

(b) heart

NE binding to alpha-1 receptors in skin vessels (a) constricts them (b) dilates them (c) no change (d) blocks flow to brain

(a) constricts them

Parasympathetic postganglionic fibers release ACh that binds to (a) nicotinic receptors (b) muscarinic receptors (c) alpha receptors (d) beta receptors

(b) muscarinic receptors

Nicotinic receptor activation is always (a) inhibitory (b) excitatory (c) modulatory (d) silent

(b) excitatory

Sympathetic stimulation of heart uses (a) beta-1 receptors (b) beta-2 receptors (c) alpha-1 receptors (d) muscarinic receptors

(a) beta-1 receptors

Muscarinic receptor activation may be (a) inhibitory (b) excitatory (c) both (d) neither

Sweat glands use __ receptors (a) alpha (b) beta (c) muscarinic (d) nicotinic

Sympathetic vasomotor tone primarily uses (a) beta receptors (b) alpha receptors (c) muscarinic receptors (d) nicotinic receptors

(b) alpha receptors

Visceral sensory neuron cell bodies are found in (a) ventral horn (b) dorsal root ganglia (c) lateral horn (d) gray rami

(b) dorsal root ganglia

Parasympathetic effects are generally (a) widespread & long lasting (b) localized & short lived (c) reflexive only (d) nonexistent

(b) localized & short lived

The limbic system influences autonomic function via (a) hypothalamus (b) cortex (c) cerebellum (d) spinal cord

(a) hypothalamus

The main ANS integration center is the (a) medulla (b) hypothalamus (c) pons (d) cortex

(b) hypothalamus

The medulla regulates (a) HR & BP (b) body temperature (c) sexual responses (d) sweating

(a) HR & BP

Sympathetic effects are long lasting because (a) ACh persists (b) NE & EPI circulate in blood (c) somatic fibers reinforce them (d) reflex arcs pause

(b) NE & EPI circulate in blood

Sympathetic fibers to the adrenal medulla (a) inhibit secretion (b) cause hormone release (c) stimulate cortisol only (d) have no effect

(b) cause hormone release

Chapter 14 (Lecture) Flashcards

(58 cards)