Self-Quiz

Life on Earth Chapter 26 The Nervous System and the Senses
Self-Quiz

___________ are integration centers in neurons.
1. dendrites
2. axons
3. cell bodies
4. ion channels
5. synapses
Disturbances in body temperature, hunger perception, menstrual cycles, water balance, and sexual arousal are symptoms of defects in the
1. cerebrum
2. thalamus
3. medulla
4. hypothalamus
5. cerebellum
Neurotransmitters can be eliminated from synapses by
1. diffusing away
2. enzymatic destruction
3. active transport into a neuron
4. all of the above
5. none of the above
What is the difference between the nervous system and the endocrine system?
1. The nervous system responds to danger, whereas the endocrine system responds to "normal" activities.
2. The speed of response is different.
3. The chemicals that transmit the signal are different.
4. The nervous system is involved with control, whereas the endocrine is involved with coordination.
5. The nervous system is entirely electrical in nature, whereas the endocrine system is entirely chemical in nature.
The functional unit of the nervous system is the
1. neuron
2. axon
3. cell Body
4. neurotransmitter
5. nerve
Which of the following represents the direction a nerve impulse travels within a single neuron?
1. synaptic terminal -> cell body -> axon -> dendrite
2. cell body -> dendrite -> axon -> synaptic terminal
3. synaptic terminal -> axon -> cell body -> dendrite
4. dendrite -> cell body -> axon -> synaptic terminal
5. synaptic terminal -> dendrite -> axon cell -> body
The cell bodies of motor neurons are located
1. in the gray matter of the spinal cord
2. in the brain
3. outside the spinal cord
4. in the muscles
5. next to the sensory terminals
Color vision is a function of ________ cells.
1. cochlear
2. cupular
3. corneal
4. choroid
5. cone
Basilar and tectorial refer to types of
1. membranes in the ear
2. eyes
3. dendrites
4. proprioceptors
5. canals
To go from the pharynx to the middle ear, a germ must travel through the
1. oval window
2. vestibular apparatus
3. eustachian tube
4. cochlea
5. auditory canal
The fovea is
1. the "blind spot"
2. a clear area in front of the pupil and iris
3. the area of the retina where an optic nerve exits the eye
4. a point of attachment between the retina and choroid coat
5. a central focal region of the vertebrate retina
Light entering the eye and striking the choroid would travel, in order, through the
1. lens, vitreous humor, cornea, aqueous humor, and retina
2. retina, aqueous humor, lens, vitreous humor, and cornea
3. cornea, aqueous humor, retina, vitreous humor, and lens
4. cornea, aqueous humor, lens, vitreous humor, and retina
5. lens, aqueous humor, cornea, vitreous humor, and retina
Pain perception is carried out by a special type of
1. mechanoreceptor
2. proprioceptor
3. chemoreceptor
4. magnetoreceptor
5. Thermoreceptor
Receptor potentials are ______________________ the strength of the stimulus.
1. unrelated to
2. the same regardless of
3. inversely proportional to
4. directly proportional to
5. much greater than
Which of the following is a mechanoreceptor?
1. olfactory receptor
2. heat receptor
3. hair cell
4. rods
5. taste bud
If the doctor says that you have a middle ear infection, which of the following would not be involved?
1. the eustachian tube
2. the hammer
3. the tympanic membrane
4. the anvil
5. the cochlea
In low light, everything appears black or white because:
1. No colored light is reflected to the eye.
2. Rods are more sensitive to light than are cones.
3. Few action potentials are stimulated at low light.
4. Only white light is available at night.
5. The diffuse light of night does not fall on the fovea.
In order for chemicals to be sensed in the nose, they must
1. first enter the mouth
2. bind to taste buds
3. cause bending of hair cells in the upper nasal cavity
4. stimulate the cones
5. diffuse into the mucus and bind to receptors

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