A+P Chapter 12

Which of the locations is where the greatest level of integration is taking place in the example of testing the temperature of the shower?

Cerebral Cortex

Which of the following cavities contains a component of the central nervous system?

Cranial

How long does all the signaling through the sensory pathway, within the central nervous system, and through the motor command pathway take?

Fraction of a second

What is the target of an upper motor neuron?

Lower motor neuron

What type of glial cell is resident macrophage behind the blood-brain barrier?

Microglia

Which structure predominates in the white matter of the brain?

Myelinated Axons

Which term describes a bundle of axons in the peripheral nervous system?

Nerve

What type of Glial cell provides myelin for the axons in a tract of the central nervous system?

Oligodendrocyte

The myelin sheath of axons in the peripheral nervous system is formed by

Schwann cells.

If a resting potential becomes more negative, the cell membrane

hyperpolarizes.

Small phagocytic cells that are especially obvious in damaged tissue in the CNS are the

microglia.

Most neurons in the brain are

multipolar.

The resting membrane of a nerve fiber refers to having the

sodium and potassium ions inside the cell.

The ________ of the neuron is the cell body.

soma

The minimum amount a stimulus must reach to generate an action potential is known as the ________.

threshold

What does a lignand-gated channel require in order to open?

Binding of a neurotransmitter

The glial cells responsible for maintaining the blood-brain barrier are the

astrocytes.

The star-shaped neuroglial cells in the central nervous system that form a supporting network and that help form the blood-brain barrier are:

astrocytes.

Neurons that have one axon and one dendrite with the soma between them are called

bipolar.

The brain and spinal cord comprise the

central nervous system.

Which type of synapse dominates the nervous system?

chemical

Opening of sodium channels in the membrane of a neuron results in

depolarization.

Saltatory conduction from node to node of an axon:

is faster than conduction on an unmyelinated axon.

The gaps between adjacent Schwann cells along the length of an axon are called ________.

nodes of Ranvier

The myelin sheaths that surround the axons of some of the neurons in the CNS are formed by

oligodendrocytes