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Exam 11: Neural Tissue

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Question 41

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Damage to ependymal cells would most likely affect the

A) formation of myelin sheaths.
B) formation of cerebrospinal fluid.
C) formation of ganglia.
D) repair of axons.
E) transport of neurotransmitters within axons.

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Question 42

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________ monitor the position of skeletal muscles and joints.

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Question 43

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The ________ nervous system is composed of the brain and spinal cord.

Regions of the CNS with an abundance of myelinated axons constitute the ________ matter.

The nervous tissue outside of the central nervous system composes the ________ nervous system.

Which of the following is the most important excitatory neurotransmitter in the brain?

After acetylcholinesterase acts, the synaptic knob

Integral membrane proteins that connect electrical synapses are called

Regions of the CNS where neuron cell bodies dominate constitute the ________ matter.

In the peripheral nervous system, Schwann cells participate in the repair of damaged nerves by

The following are the steps involved in transmission at a cholinergic synapse. 1) Chemically gated sodium channels on the postsynaptic membrane are activated. 2) Calcium ions enter the synaptic knob. 3) Acetylcholinesterase hydrolyzes acetylcholine. 4) An action potential depolarizes the synaptic knob at the presynaptic membrane. 5) The synaptic knob reabsorbs choline. 6) Acetylcholine is released from storage vesicles by exocytosis. 7) Acetylcholine binds to receptors on the postsynaptic membrane. 8) Calcium ions are removed from the cytoplasm of the synaptic knob. The correct sequence for these events is

The ________ nervous system provides involuntary regulation of smooth muscle, cardiac muscle, and glandular activity.

Glial cells that surround the neurons in ganglia are

The period during which an excitable membrane can respond again, but only if the stimulus is greater than the threshold stimulus, is the ________.

The myelin sheath that covers many CNS axons is formed by

Raising the potassium ion concentration in the extracellular fluid surrounding a nerve cell will have which effect?

________ neurons are short, with a cell body between dendrite and axon, and occur in special sense organs.

Figure 11-2 The Nerve Action Potential Use Figure 11-2 to answer the following questions: -Which area of the graph occurs when there is a sudden inrush of sodium ions?

After a stroke, what type of glial cell accumulates within the affected brain region?

If the axon terminal of a motor neuron suddenly became permeable to calcium ion,