Exam 3 Study Guide (Mastering A&P)

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lonelygirl
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215476
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Exam 3 Study Guide (Mastering A&P)
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2013-05-18 00:47:44
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Biology Anatomy Physiology
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Biology 103A
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  1. What part of the nervous system performs information processing and integration?

    A. central nervous system
    B. parasympathetic nervous system
    C. sympathetic nervous system
    D. somatic nervous system
    A. central nervous system
    (this multiple choice question has been scrambled)
  2. Which of the following is NOT a difference between graded potentials and action potentials?

    A. Spatial summation is used to increase the amplitude of a graded potential; temporal summation is used to increase the amplitude of an action potential.
    B. Graded potentials can result from the opening of chemically gated channels; action potentials require the opening of voltage-gated channels.
    C. Greater stimulus intensity results in larger graded potentials, but not larger action potentials.
    D. Graded potentials occur along dendrites, whereas action potentials occur along axons.
    A. Spatial summation is used to increase the amplitude of a graded potential; temporal summation is used to increase the amplitude of an action potential.
    (this multiple choice question has been scrambled)
  3. Which of the following is a factor that determines the rate of impulse propagation, or conduction velocity, along an axon?

    A. whether the axon is located in the central nervous system or in the peripheral nervous system
    B. the number of axon collaterals extending from a truncated axon
    C. degree of myelination of the axon
    D. length of the axon
    C. degree of myelination of the axon
    (this multiple choice question has been scrambled)
  4. At which point of the illustrated action potential are the most gated Na+ channels open?



    A
    B
    C
    D
    E
    B
  5. What type of stimulus is required for an action potential to be generated?

    A. hyperpolarization
    B. a threshold level depolarization
    C. a suprathreshold stimulus
    D. multiple stimuli
    B. a threshold level depolarization
    (this multiple choice question has been scrambled)
  6. How is an action potential propagated along an axon?

    A. Stimuli from the graded (local) potentials from the soma and dendrites depolarize the entire axon.
    B. An influx of sodium ions from the current action potential depolarizes the adjacent area.
    C. An efflux of potassium from the current action potential depolarizes the adjacent area.
    B. An influx of sodium ions from the current action potential depolarizes the adjacent area.
    (this multiple choice question has been scrambled)
  7. Why does the action potential only move away from the cell body?

    A. The areas that have had the action potential are refractory to a new action potential.
    B. The flow of the sodium ions only goes in one direction—away from the cell body
    A. The areas that have had the action potential are refractory to a new action potential
  8. The velocity of the action potential is fastest in which of the following axons?

    A. a small unmyelinated axon
    B. a small myelinated axon
    C. a large unmyelinated axon
    B. a small myelinated axon
    (this multiple choice question has been scrambled)
  9. Which of the following statements most accurately describes the effects caused by binding of the ligand shown to the structure labeled C?



    A. The ligand is transported into the presynaptic neuron.
    B. The membrane potential of the presynaptic membrane changes.
    C. The membrane potential of the postsynaptic membrane changes.
    D. The ligand is transported into the postsynaptic neuron.
    C. The membrane potential of the postsynaptic membrane changes.
    (this multiple choice question has been scrambled)
  10. Opening K+ or Cl- channels in a postsynaptic membrane would produce an inhibitory postsynaptic potential (IPSP). True or False
    True
  11. Which pattern of neural processing works in a predictable, all-or-nothing manner, where reflexes are rapid and automatic responses
    to stimuli in which a particular stimulus always causes the same response?

    A. parallel processing
    B. reflexive processing
    C. serial processing
    D. oscillative processing
    C. serial processing
    (this multiple choice question has been scrambled)
  12. Which of the following areas of the brain is responsible for spatial discrimination?

    A. gustatory cortex
    B. vestibular cortex
    C. primary somatosensory cortex
    D. Broca's area
    C. primary somatosensory cortex
    (this multiple choice question has been scrambled)
  13. Which of the following areas of the brain controls voluntary movement of the eyes?

    A. frontal eye field
    B. gustatory cortex
    C. visual association area
    D. primary visual cortex
    A. frontal eye field
    (this multiple choice question has been scrambled)
  14. Which of the following is NOT a function of the hypothalamus?

    A. emotional responses
    B. secretion of the hormone melatonin
    C. regulation of body temperature
    D. regulation of food intake
    B. secretion of the hormone melatonin
    (this multiple choice question has been scrambled)
  15. In general, information flows from sensory receptors to the appropriate primary sensory cortex. True or False
    True
  16. Which parts of the brain constitute the "emotional brain" known as the limbic system?

    A. cerebral and brain stem structures
    B. diencephalic and brain stem structures
    C. diencephalic and mesencephalic structures
    D. cerebral and diencephalic structures
    D. cerebral and diencephalic structures
    (this multiple choice question has been scrambled)
  17. Which part of the brain is considered the "gateway" to the cerebral cortex?

    A. mesencephalon
    B. thalamus
    C. pons
    D. hypothalamus
    B. thalamus
    (this multiple choice question has been scrambled)
  18. Prevents muscle overstretching and maintains muscle tone.

    A. Stretch
    B. Crossed-extensor
    C. Plantar
    D. Tendon
    E. Flexor
    A. Stretch
    (this multiple choice question has been scrambled)
  19. Tests both upper and lower motor pathways. The sole of the foot is stimulated with a dull instrument.

    A. Tendon
    B. Plantar
    C. Crossed-extensor
    D. Stretch
    E. Flexor
    B. Plantar
    (this multiple choice question has been scrambled)
  20. roduces a rapid withdrawal of the body part from a painful stimulus; ipsilateral.

    A. Stretch
    B. Plantar
    C. Tendon
    D. Flexor
    E. Crossed-extensor
    D. Flexor
    (this multiple choice question has been scrambled)
  21. Consists of an ipsilateral withdrawal reflex and a contralateral extensor reflex; important in maintaining balance.

    A. Flexor
    B. Crossed-extensor
    C. Stretch
    D. Tendon
    E. Plantar
    B. Crossed-extensor
    (this multiple choice question has been scrambled)
  22. Produces muscle relaxation and lengthening in response to tension; the contracting muscle
    relaxes as its antagonist is activated.


    A. Stretch
    B. Crossed-extensor
    C. Flexor
    D. Plantar
    E. Tendon
    E. Tendon
    (this multiple choice question has been scrambled)
  23. Dorsal and ventral rami are similar in that they both contain sensory and motor fibers. True or False
    True
  24. The secretions of the adrenal medulla act to supplement the effects of ________.

    A. neurosecretory substances
    B. parasympathetic innervation
    C. sympathetic stimulation
    D. vagus nerve activity
    C. sympathetic stimulation
    (this multiple choice question has been scrambled)
  25. The parasympathetic ganglion that serves the eye is the ________.

    A. otic ganglion
    B. submandibular ganglion
    C. pterygopalatine ganglion
    D. ciliary ganglion
    D. ciliary ganglion
    (this multiple choice question has been scrambled)
  26. Cardiovascular effects of the sympathetic division include all except ________.

    A. dilation of the vessels serving the skeletal muscles
    B. dilation of the blood vessels serving the skin and digestive viscera
    C. increase of heart rate and force
    D. constriction of most blood vessels
    B. dilation of the blood vessels serving the skin and digestive viscera
    (this multiple choice question has been scrambled)
  27. Sympathetic nerves may leave the spinal cord at which vertebra?

    A. third lumbar
    B. first thoracic
    C. first coccyx
    D. second cervical
    B. first thoracic
    (this multiple choice question has been scrambled)
  28. The parasympathetic fibers of the ________ nerves innervate smooth muscles of the eye that cause the lenses to bulge to accommodate close vision.

    A. trochlear
    B. oculomotor
    C. abducens
    D. optic
    B. oculomotor
    (this multiple choice question has been scrambled)
  29. Visceral reflex arcs differ from somatic in that ________.

    A. somatic arcs contain one additional component that visceral arcs do not possess
    B. visceral arcs do not use integration centers
    C. visceral arcs contain two sensory neurons
    D. visceral arcs involve two motor neurons
    D. visceral arcs involve two motor neurons
    (this multiple choice question has been scrambled)
  30. Once a sympathetic preganglionic axon reaches a trunk ganglion, it can do all but which one of the following?

    A. synapase with a ganglionic neuron in the same trunk ganglion
    B. synapse with a parasympathetic neuron in the same trunk ganglion
    C. ascend or descend the trunk to synapse in another trunk ganglion
    D. pass through the trunk ganglion without synapsing with another neuron
    A. synapse with a parasympathetic neuron in the same trunk ganglion
    (this multiple choice question has been scrambled)
  31. Sympathetic division stimulation causes ________.

    A. increased blood glucose, decreased GI peristalsis, and increased heart rate and blood pressure
    B. decreased blood glucose, increased GI peristalsis, and increased heart rate and blood pressure
    C. increased blood glucose, increased GI peristalsis, and decreased heart rate and blood pressure
    D. decreased blood glucose, increased GI peristalsis, and decreased heart rate and blood pressure
    A. increased blood glucose, decreased GI peristalsis, and increased heart rate and blood pressure
    (this multiple choice question has been scrambled)
  32. The route of major parasympathetic outflow from the head is via the ________.

    A. phrenic nerve
    B. sacral nerve
    C. vagus nerve
    D. sympathetic trunk
    C. vagus nerve
    (this multiple choice question has been scrambled)
  33. The rami communicantes are associated only with the sympathetic division of the ANS. True or False
    True
  34. The adrenal medulla is considered a "misplaced" sympathetic ganglion by some. True or False
    True
  35. Where would you NOT find a cholinergic nicotinic receptor?

    A. all postganglionic neurons
    B. skeletal muscle motor end plates
    C. all parasympathetic target organs
    D. adrenal medulla hormone producing cells
    C. all parasympathetic target organs
    (this multiple choice question has been scrambled)
  36. Control of temperature, endocrine activity, and thirst are functions associated with the ________.

    A. cerebellum
    B. thalamus
    C. hypothalamus
    D. medulla
    C. hypothalamus
    (this multiple choice question has been scrambled)
  37. The parasympathetic tone ________.

    A. accelerates activity of the digestive tract
    B. prevents unnecessary heart deceleration
    C. determines normal activity of the urinary tract
    D. causes blood pressure to rise
    C. determines normal activity of the urinary tract
    (this multiple choice question has been scrambled)
  38. Which of the following appears to exert the most direct influence over autonomic function?

    A. reticular formation
    B. midbrain
    C. hypothalamus
    D. medulla oblongata
    A. reticular formation
    (this multiple choice question has been scrambled)
  39. Which is a uniquely sympathetic function?

    A. regulation of pupil size
    B. regulation of cardiac rate
    C. regulation of body temperature
    D. regulation of respiratory rate
    C. regulation of body temperature
    (this multiple choice question has been scrambled)
  40. Which of the following adrenergic neurotransmitter receptors plays the major role in heart activity?

    A. alpha 1
    B. beta 2
    C. beta 3
    D. beta 1
    D. beta 1
    (this multiple choice question has been scrambled)
  41. Alpha-adrenergic effects dominate the direct control of blood pressure. True or False
    True
  42. Norepinephrine-releasing fibers are called cholinergic fibers. True or False
    False; adrenergic
  43. β-adrenergic receptors are the only receptors found on the heart. True or False
    False

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