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Which of the following best describes the arachnoid mater?

Blood-brain barrier

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Schwann cells and oligodendrocytes

generate and conduct action potentials.

are sensory neurons.

synthesize all neurotransmitters in the CNS.

synthesize myelin sheath of neurons in the brain, spinal cord, and peripheral nerves.

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The temporal lobe

is a cerebellar structure.

is a large mass of white matter that joins the right and left cerebral hemispheres.

contains the primary auditory cortex.

is a brain stem structure.

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The inside of the unstimulated neuron is negative; this electrical charge is caused by the outward leak of potassium and is called

depolarization.

the resting membrane potential.

the action potential.

the refractory period.

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Clinically, an elevated blood level of creatine phosphate is indicative of

calcium deficiency.

flaccid paralysis.

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Which of the following forms cross-bridges with actin?

Sarcoplasmic reticulum

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The biceps femoris, semitendinosus, and semimembranosus

are located on the anterior thigh.

are the hamstrings.

attach to the patella.

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Which of the following does not refer to the thin filament?

Myosin binding site

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Acetylcholine is released from the neuron's membrane in response to the

release of calcium from the sarcoplasmic reticulum.

inactivation of acetylcholinesterase.

binding of the myosin heads to actin.

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The orbicularis oculi

is the kissing muscle.

encircles the eye.

lifts the eyelid.

purses the lips.

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