Exam 12: Nervous Tissue

Graded potentials

How does blocking retrograde axoplasmic transport in an axon affect the activity of a neuron?

Neurons that are rare, small, and lack features that distinguish dendrites from axons are called

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -Which type of membrane channels are found at label "3"?

The myelination of central and peripheral axons occurs rapidly through the first few years of life. How canthis developmental process explain the improved motor abilities of infants and toddlers?

Which of the following is not true regarding the establishment of a neuron's resting membrane potential?

The tiny gaps between adjacent Schwann cells are called

At the normal resting membrane potential of a typical neuron, its sodium-potassium exchange pump transports

The plasma membrane of an axon is called the

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

Voltage-gated sodium channels have both an activation gate and a(n) ________ gate.

The cytoplasm that surrounds the nucleus of a neuron is called the

The rabies virus travels to the CNS via

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

A deficiency in which neurotransmitter would cause Parkinson's-like symptoms?

If the sodium-potassium pumps in the plasma membrane fail to function, all of the following occur except

________ account for roughly half of the volume of the nervous system.

Neurons in which dendritic and axonal processes are continuous and the soma lies off to one side are called

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

Deteriorating changes in the distal segment of an axon as a result of a break between it and the soma iscalled ________ degeneration.