Biology (Raven), 9th Edition

Chapter 45: Sensory Systems

Pre-Test

1
Which of the following is a true statement regarding baroreceptors?
A)When blood pressure decreases, the frequency of impulses produced by baroreceptors increases.
B)A rise in blood pressure reduces sympathetic activity.
C)Baroreceptors monitor blood pressure in the pulmonary artery and left ventricle.
D)As blood pressure increases, the CNS stimulates an increase in vasoconstriction.
E)Baroreceptors are motor neurons that cause the heart to contract.
2
The simplest sensory receptors in a nervous system are
A)found only in invertebrates.
B)auditory receptors.
C)mechanical receptors that employ a lever device.
D)free nerve endings that depolarize in response to direct physical stimulation.
E)responsible for both monitoring and interpreting internal body conditions.
3
Which of the following is NOT a mechanical stimulus?
A)gravity
B)sound
C)humidity
D)touch
E)vibration
4
The greater the intensity of a sensory stimulus,
A)the stronger the resulting action potentials sent to the brain.
B)the greater the frequency of action potentials sent to the brain.
C)The higher the frequency of action potentials sent to the brain.
D)The weaker the resulting action potentials sent to the brain.
E)None of these are correct.
5
Which of the following is not one of the four basic taste categories that human taste buds respond to?
A)bitter
B)salty
C)sweet
D)sour
E)spicy
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