-
A complete nerve, consists of numerous fascicles and their blood supply, is held together by a fiberous coat called the:
C. Epineurium
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Small, distinct regions of gray matter within the CNS are usually called:
B. Nuclei
-
Nerves that contain mostly efferent fibers are called:
B. Motor Nerves
-
Which of the following are classified as nerve fibers?
- C. Both A and B.
- ( axon and dendrites)
-
Which of the following conduct impulses towards the cell body?
B. Dendrites
-
A neuron with one axon and several dendrites is a:
A. Multipolar neuron
-
Gray matter in the CNS consists of:
D. Cell bodies
-
Most nerves in the human nervous system are:
C. Mixed nerves
-
Which type of neuron lies entirely within the CNS?
C. Interneuron
-
Which sequence best represents the course of impulse over a reflex arc?
D. Receptor, sensory neuron, interneuron, motor neuron, efferent.
-
Compared with the inside of the cell, the outside of most cell membranes is
A. Positive
-
The difference in electrical chrage across a plasma membrane is called:
B. Membrane potential
-
A neuron's resting membrane potential is
B. -70 mV
-
Which of the following statements is true concerning the sodium-potassium pump?
A. Three (3) sodium ions are pumped out of the neuron for every two (2) potassium ions.
-
During a relative refractory period:
B. An action potential is possible only in response to a very strong stimulus
-
Voltage-gated channels are:
B. Membrane channels that open in response to voltage fluctuations.
-
When the current leaps across an insulating myelin sheath from node of Ranvier to node Ranvier, the type of impulse conduction is:
C. Saltatory conduction
-
Which of the following structures is NOT a component of a chemical synapse?
C. Neurotransmitter
-
A synopatic knob is located on the:
B.Axon
-
Which of the following is true of spatial summation?
A. Neurotransmitters released simulaneously from several presynaptic knobs.
-
Neurotransmitters are released in a synapse and bind to:
C. Base of the axon
-
The main chemical classes of neurotransmitters include all of the following excpect:
C. Norepinephrine.
-
Which of the following is NOT an example of amine neurotransmitter?
C.Glycine
-
Severe depression can be caused by a deficit in ehich of the following neurotransmitters?
C. Amines
-
Which of the following is NOT a catecholamine?
D. Serotonin
-
From superficial to deep, which is the correct order of loaction of the meninges?
A. Dura mater, arachnoid membrane, pia mater.
-
The falx cerebri seperates the:
C. Two hemispheres of the cerebrum.
-
The cerebrospinal fluid resides in the:
B. Subarachnoid space.
-
Formation of the cerebrospinal fluid occures mainly in the:
C. Choroid pleuses
-
The lateral ventricles are located within the:
A. Cerebrum
-
CSF is absorbed into the venous blood via the:
D. Arachnoid villus
-
Cerebrospinal fluid is NOT found in the:
D. Subdural space
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