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BIOS 1300 SI
SI Leader: Merrin Jeffries (email: [email protected])
Week 15 – Session 3
4 December 2014
Multiple Choice:
Chapter 15
1. The area of sensory cortex devoted to a body region is relative to the:
a. size of the body area
b. distance of the body area from the brain
c. number of motor units in the area of the body
d. number of sensory receptors in the area of the body
e. size of the nerves that serve the area of the body
2. The autonomic division of the nervous system directs
a. voluntary motor activity
b. conscious control of skeletal muscles
c. unconscious control of skeletal muscles
d. processes that maintain homeostasis
e. sensory input from the skin
3. The division of the ANS that prepares the body for activity and stress is the __________
division.
a. sympathetic
b. parasympathetic
c. craniosacral
d. intramural
e. somatomotor
4. Effects produced by the parasympathetic branch of the ANS include
a. dilation of the pupils
b. increased secretion by digestive glands
c. dilation of respiratory passages
d. increased heart rate
e. increased breakdown of glycogen by the liver
5. A progressive disorder characterized by the loss of higher order cerebral function is
a. Parkinson disease
b. parasomnia
c. Huntington disease
d. Alzheimer disease
6. All preganglionic autonomic fibers release __________at their synaptic terminals, and the
effects are always ___________.
a. norepinephrine; inhibitory
b. norepinephrine; excitatory
c. acetylcholine; excitatory
d. acetylcholine; inhibitory
7. The neurotransmitter at all synapses and neuromuscular or neuroglandular junctions in the
parasympathetic division of the ANS is
a. epinephrine
b. norepinephrine
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c. cyclic –AMP
d. acetylcholine
8. Dual innervation refers to situations in which
a. vital organs receive instructions from both sympathetic and parasympathetic fibers
b. the atria and ventricles of the heart receive autonomic stimulation from the same
nerves
c. sympathetic and parasympathetic fibers have similar effects
d. a, b, and c are correct
9. Damage to the hippocampus, a component of the limbic system, leads to
a. a loss of emotion due to forgetfulness
b. a loss of consciousness
c. a loss of long term memory
d. an immediate loss of short term memory
10. Under which of the following circumstances would the diameter of peripheral blood vessels
be the greatest?
a. increased sympathetic stimulation
b. decreased sympathetic stimulation
c. increased parasympathetic stimulation
d. decreased parasympathetic stimulation
e. both increased sympathetic and parasympathetic stimulation
11. A possible side effect of a drug used to open the airways of someone suffering from an
asthma attack is:
a. decreased activity of the digestive system
b. diarrhea
c. profuse urination
d. increased blood pressure
e. decreased heart rate
Chapter 16
1. A blind spot occurs in the retina where
a. the fovea is located
b. ganglion cells synapse with bipolar cells
c. the optic nerve attaches to the retina
d. rod cells are clustered to form the macula
e. amacrine cells are located
2. The retina is
a. the vascular tunic
b. the fibrous tunic
c. the neural tunic
d. all of these
e. none of these
3. At sunset, your visual system adapts to
a. fovea vision
b. rod-based vision
c. macular vision
d. cone-based vision
4. When viewing an object close to you, your lens should be more ____________.
a. rounded
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b. flattened
c. concave
d. lateral
e. medial
5. Sound waves are converted into mechanical movements by the
a. auditory ossicles
b. cochlea
c. oval window
d. round window
e. tympanic membrane
6. The basic receptors in the inner ear are the
a. utricles
b. saccules
c. hair cells
d. supporting cells
e.ampullae
7. The malleus, incus, and stapes are the tiny bones located in the
a. outer ear
b. middle ear
c. inner ear
d. membranous labyrinth
8. Receptors in the saccule and utricle provide sensations of
a. angular acceleration
b. hearing
c. vibration
d. gravity and linear acceleration
9. The organ of Corti is located in the ________of the inner ear.
a. utricle
b. bony labyrinth
c. vestibule
d.cochlea
10. Auditory information about the frequency and intensity of stimulation is relayed to the CNS
over the cochlear branch of cranial nerve
a. IV
b. VI
c. VIII
d. X
11. Displacement of sterocilia toward the kinocilium of a hair cell
a. produces a depolarization of the membrane
b. produces a hyperpolarization of the membrane
c. decrease the membrane permeability to sodium ions
d. increases the membrane permeability to potassium ions
e. does not affect the transmembrane potential of the cell
12. Damage to the cupula of the lateral semicircular duct would interfere with the perception of
a. the direction of gravitational pull
b. linear acceleration
c. horizontal rotation of the head
d. vertical rotation of the head
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e. angular rotation of the head
13. The senses of equilibrium and hearing are provided by receptors in the:
a. external ear
b. middle ear
c. inner ear
d. a, b, c, are correct
14. The dividing line between the external ear and the middle ear is the:
a. pharyngotympanic tube
b. tympanic membrane
c. sacculus
d. utriculus
15. One of the few examples of neuronal replacement occurs in the:
a. gustatory receptor population
b. olfactory receptor population
c. optic receptor population
d. vestibuloreceptor population
16. During the olfaction process the first synapse occurs at the:
a. olfactory bulbs of the cerebrum
b. olfactory tracts of the cerebrum
c. olfactory cortex of the cerebrum
d. olfactory epithelium
17. The intensity (volume) of a perceived sound is determined by:
a. which part of the cochlear duct is stimulated
b. how many of the hair cells in the cochlear duct are stimulated
c. pressure fluctuations in the endolymph of the vestibular complex
d. tectorial membrane vibrations
18. The receptors in the inner ear that provide sensations of gravity and linear acceleration are
located in the:
a. ampulla and capula
b. otoliths
c. semicircular and cochlear ducts
d. saccule and utricle
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Short Answer:
Chapter 15
1. Nicotine stimulates cholinergic receptors of the autonomic nervous system. Based on this
information, how would cigarette smoking affect the cardiovascular system?
2. Kelly is having difficulty controlling her eye movements and has lost some control of her
facial muscles. After an examination and testing, Kelly's physician tells her that her cranial
nerves are perfectly normal but that a small tumor is putting pressure on certain fiber tracts
in her brain. This pressure is the cause of Kelly's symptoms. Where is the tumor most likely
located?
3. Clarence, a construction worker, suffers a fractured skull when a beam falls on his head.
Diagnostic tests indicate severe damage to the motor cortex. His wife is anxious to know if
he will ever be able to move or walk again. What would you tell her?
4. Phil is stung on his cheek by a wasp. Because Phil is allergic to wasp venom, his throat begins
to swell and his respiratory passages constrict. Would acetylcholine or epinephrine be more
helpful in relieving his condition? Why?
5. While studying the activity of smooth muscle in blood vessels, Shelly discovers that when
applied to a muscle plasma membrane, a molecule chemically similar to a neurotransmitter
triggers an increase in intracellular calcium ions. Which neurotransmitter is the molecule
mimicking and to which receptors is it binding?
Chapter 16
1. If the round window were not able to bulge out with increased pressure in the perilymph,
how would the perception of sound be affected?
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2. How would the loss of stereocilia from hair cells of the spiral organ affect hearing?
3. Why would blockage of the auditory tube produce an earache?
4. What are the three auditory ossicles in the middle ear, and what are their functions?
1.
2.
3.
5. Juan has a disorder involving the saccule and utricle. He is asked to stand with his feet
together and arms extended forward. As long as he keeps his eye open, he exhibits very little
movement. But when he closes his eyes, his body begins to sway a great deal and his arms tend
to drift in the directions of the impaired vestibular receptors. Why does this Occur?
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Label: Spinal Organ or Organ of Corti:
Label: Gross Anatomy of the Cochlea: