Physiology V01 - Introduction to Human Physiology » Fall 2021 » Lecture Quiz 5

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Question #1
What type of neuroglial cells provide a barrier between the blood and interstitial fluids?
A.   epndymal cells
B.   astrocytes
C.   oligodendrocytes
D.   microglia
E.   Schwann cells
Question #2
Graded potentials spread passively by electrotonic condition.
A.   FALSE
B.   TRUE
Question #3
Which of the following is not true of a generator potential
A.   repolarization is due to "leakage" of Na+ or K+ through the cell membrane via their respective leak channels and the degree of depolarization or hyperpolarization depends on how many Na+ or K+ gates open
B.   stimulus opens Na+ gates → Na+ diffuse out of the cell and the resting potential becomes more negative and if a stimulus causes K+ gates to open, K+ will diffuse in and the resting potential will become less negative
C.   the degree of depolarization or hyperpolarization depends on how many Na+ or K+ gates open and the number of gates that are opened depend upon the strength of the stimulus
Question #4
In a myelinated axon, only the nodes of Ranvier can depolarize to threshold.
A.   FALSE
B.   TRUE
Question #5
The resting potential is primarily due to which of the following?
A.   diffusion of K+ into the cell
B.   diffusion of Na+ into the cell
C.   diffusion of K+ out of the cell
D.   diffusion of Cl- out of the cell
E.   diffusion of Na+ out of the cell
Question #6
The cerebellum initiates and controls all voluntary skeletal muscle movements.
A.   FALSE
B.   TRUE
Question #7
Which of the following are functions of the medulla oblongata?
A.   controls the respiratory rate
B.   controls the size of blood vessels
C.   controls the reflexes for swallowing, sneezing, coughing, vomiting and blinking
D.   controls the heart rate
E.   controls the heart rate, controls the size of blood vessels, controls the size of blood vessels and controls the reflexes for swallowing, sneezing, coughing, vomiting and blinking
Question #8
The midbrain contains two centers that help to control respiration.
A.   TRUE
B.   FALSE
Question #9
What part of the cerebral cortex is involved with attentiveness, behavior and thought?
A.   primary motor cortex
B.   parietal and temporal areas
C.   prefrontal cortex
D.   gustatory and olfactory cortex
E.   primary somatic sensory cortex
Question #10
Spinal stretch reflexes are monosynaptic and contralateral.
A.   FALSE
B.   TRUE
Question #11
Which step is not true of an excitatory synapse?
A.   Ca2+ diffuses into the cell causing the release of neurotransmitters from the synaptic vesicles
B.   summation of EPSPs occur at the axon hillock, and if threshold is reached, an impulse is generated
C.   impulse at the axon terminal opens voltage-regulated Ca2+ gates
D.   neurotransmitters diffuse across the synaptic gap and attach to receptors on the postsynaptic membrane causing the K+ gates to open allowing to K+ diffuse out
E.   an excitatory postsynaptic potential (EPSP), is generated
Question #12
Synaptic integration refers to the interaction of multiple EPSPs and IPSPs at the axon hillock.
A.   FALSE
B.   TRUE

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