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Physio 2 Exam

An educational illustration of the central nervous system highlighting neurons, synapses, and myelination, with a backdrop of brain anatomy.

Physio 2 Exam Quiz

Test your knowledge on the intricacies of the central nervous system with our comprehensive Physio 2 Exam Quiz. This quiz covers essential topics including neuronal functions, neurotransmitters, and the myelination process, making it ideal for students and professionals in the field of physiology.

Key features of the quiz:

23 challenging multiple-choice questions
In-depth coverage of neurological concepts
Immediate feedback on your answers

23 Questions6 MinutesCreated by LearningNeuron101

All of the following are functions of astrocytes except:

Produce myelin

Provide physical support to axons

through tight cell junctions with capillaries, control movement of components from the blood to CNS tissue

Uptake glucose from the capillary and chemically convert it into lactate for metabolic use by the CNS tissue

A sodium channel blocking medication would have the effect of:

Making depolarization of a nerve cell less likely to occur

Making the interior of a nerve cell more positive

Making depolarization of a nerve cell more likely to occur

Oligodendrocytes are responsible for myelin production in the peripheral nervous system.

True

False

Grey matter of the brain is largely composed of myelin-containing axons, and is located in the deeper aspects of the cerebrum.

True

False

Movement of potassium out of the cell, or movement of chloride into the cell would have the effect of hyperpolarizing the cell.

True

False

The vast majority of cells in the CNS are axons.

True

False

Aceytlcholine is the primary inhibitory neurotransmitter of skeletal muscle motor neurons.

True

False

Serotonin is a critical neurotransmitter in voluntary muscle control, and is severely depleted in the symptomatic patients with Parkinson’s disease.

True

False

Sensory (afferent) neurons:

Transmit impulses to the CNS

Transmit impulses from the CNS to muscles and glands

Can transmit impulses to and from the CNS

Are ventral nerves

An action potential:

All are correct

Travels from the dendrites to cell body to axon to end feet

Depolarizes on the all or none principle

Is a positive feedback loop

Mylenated nerve fibers can:

Conduct impulses faster than non-mylenated nerve fibers

Conduct only motor impulses

Conduct only sensory impulses

All are correct

The myelin sheaths of the peripheral nervous system neurons are produced by:

Oligodendrocytes.

ependymal cells.

leukocytes.

monocytes.

Schwann cells.

Sensory nerves regulate muscle contraction.

True

False

Sensory neurons

Are multipolar and carry impulses toward the CNS.

Are bipolar and carry impulses away from the CNS.

Are multipolar and carry impulses away from the CNS.

Which division of the nervous system innervates involuntary effectors?

Autonomic nervous system

Associative nervous system

somatic nervous system

The gap of exposed axon in the myelin sheath is the:

sheath of Schwann.

Neurilemma.

Node of Ranvier.

white matter.

The blood-brain barrier may prevent medications from reaching brain tissue.

True

False

During an action potential:

Na+ influx causes depolarization.

K+ influx causes after-hyperpolarization.

Na+ efflux causes depolarization.

K+ influx causes repolarization.

Chemicals that stimulate action potentials in postsynaptic cells are called :

neurotrophins.

Neurotransmitters.

enzymes.

hormones.

Postsynaptic inhibition is caused by neurotransmitters that produce hyperpolarization.

True

False

The brain and spinal cord comprise the:

Peripheral nervous system.

peripheral ganglia.

Central nervous system.

spinal nerves.

Somatic motor neurons innervate involuntary effectors.

True

False

Myelinated axons transmit action potentials more rapidly than unmyelinated axons. True

True

False

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