Human Anatomy & Physiology + Modified MasteringA&P with Pearson EText + Get Ready for A&P + Brief Atlas of the Human Body: Anatomy and Physiology 1 Chapter 13 Flashcards


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1
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What reaction would occur if the muscle labeled E were suddenly pulled longer?

  • the relaxation of muscle E
  • the relaxation of the both muscles E and G
  • the contraction of muscle E
  • the contraction of the both muscles E and G
  • the contraction of muscle E
  • A sudden stretch in a muscle leads to the contraction of the stretched muscle (E) and the relaxation of the antagonistic muscle (G).
2

Which cranial nerve transmits information about audition?

  • optic
  • abducens
  • vestibulocochlear
  • vagus
  • vestibulocochlear
  • The vestibular branch of the vestibulocochlear nerve transmits afferent impulses for the sense of equilibrium. The cochlear branch transmits afferent impulses for the sense of hearing.
3

Which cranial nerve innervates most of the visceral organs?

  • accessory
  • hypoglossal
  • vagus
  • abducens
  • vagus
  • The vagus nerve has many targets in the thoracic and abdominal cavities and innervates many of the visceral organs.
4

Which of the following carries no sensory information?

  • trigeminal nerve
  • vestibulocochlear nerve
  • hypoglossal nerve
  • optic nerve
  • hypoglossal nerve
  • The hypoglossal nerve carries motor commands to the tongue.
5
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6

The knee-jerk reflex is an example of a __________.

  • tendon reflex
  • flexor reflex
  • stretch reflex
  • superficial reflex
  • stretch reflex
  • The most familiar clinical example of a stretch reflex is the knee-jerk reflex. The overall goal of a stretch reflex is to maintain a muscle's length and in turn maintain body position. For example, the knee-jerk reflex, during which the knee extensors contract in response to being stretched, helps keep your knees from buckling when you are standing upright.
7

Which pair below is incorrect?

  • cranial nerve VI: eye movement
  • cranial nerve III: oculomotor nerve
  • cranial nerve III: pupillary constriction
  • optic nerve: sensory
  • cranial Nerve IV: sensory
  • cranial Nerve IV: sensory
  • The trochlear nerve is a motor nerve that innervates the superior oblique of the eye.
8

Which reflex has a contralateral component?

  • stretch
  • crossed-extensor
  • tendon
  • flexor
  • crossed-extensor
  • The crossed-extensor reflex activates opposing actions in the opposite limb.
9

The phrenic nerve is a branch from the __________.

  • brachial plexus
  • thoracic spinal cord
  • vagus nerve
  • cervical plexus
  • cervical plexus
  • The phrenic nerve, which arises from the cervical plexus, supplies both motor and sensory fibers to the diaphragm, the main breathing muscle.
10
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What is the type of reflex represented by the pathway that includes A, D, and C?

  • reciprocal inhibition
  • stretch reflex
  • cross-extension reflex
  • flexor reflex
  • reciprocal inhibition
  • When a muscle is contracted, its antagonist (“reciprocal”) is reflexively relaxed.
11

The sensory division of the PNS is also known as the efferent division.

  • True
  • False
  • False
  • All of the sensory information is considered afferent, or flowing toward the CNS. Efferent means "from the CNS."
12

__________ are receptors that can respond to painful stimuli.

  • Photoreceptors
  • Nociceptors
  • Mechanoreceptors
  • Chemoreceptors
  • Nociceptors
  • Nociceptors respond to potentially damaging stimuli that result in pain.
13
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14
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15
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What is the specific function of the structure labeled F?

  • increasing tension of the surrounding muscle
  • increasing tension of the antagonistic muscle
  • determination of muscle tension
  • determination of muscle length
  • increasing tension of the antagonistic muscle
16

In carpal tunnel syndrome, the __________ is compressed.

  • axillary nerve
  • median nerve
  • musculocutaneous nerve
  • radial nerve
  • median nerve
  • The median nerve descends through the arm and forearm before passing through the wrist. Compression of this nerve in the anterior wrist causes carpal tunnel syndrome.
17
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The synapse between which of the following two neurons is a part of a monosynaptic reflex arc?

  • A and D
  • A and B
  • B and C
  • A and C
  • A and B
  • A monosynaptic reflex arc includes a synapse between sensory and motor neurons without the involvement of an interneuron.
18
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Which of the receptor types pictured functions exclusively as a proprioceptor?

  • B
  • C
  • D
  • All of the listed responses are correct.
  • B
  • Proprioceptors are sensitive to stimuli associated with body movements. The muscle spindle shown in B is responsive to muscle stretch.
19

Which of the following is NOT correct concerning nerves?

  • Nerves do not contain cell bodies.
  • Nerves are analogous to tracts in the CNS.
  • Nerves are covered by an outer sheath called the epineurium.
  • Nerves are collection of axons of either sensory or motor neurons but not both.
  • Nerves are collection of axons of either sensory or motor neurons but not both.
  • Nerves can be mixed collections of both sensory and motor axons.
20

Which of the following cranial nerves carries only motor information?

  • optic
  • trigeminal
  • olfactory
  • abducens
  • abducens
  • The abducens carries efferent (motor) signals to the extrinsic eye muscle that abducts the eye (turns it laterally).