Nervous System Part 2

Afferent Neuron

Neuron that conducts impulses toward the CNS from the body periphery.

Association Neuron

neuron, serving as part of the conduction pathway between sensory and motor neurons

Efferent Neuron

Neuron that conducts impulses away from the CNS to muscles and glands.

Cutaneous sense organs

sensory receptors found in the skin, which are specialized to detect temperature, pressure changes, and pain

Ganglion

collection of nerve cell bodies in the peripheral nervous system

Neuroglia

cells that support and protect neurons

Neurotransmitters

chemicals released by nuerons that stimulate other neurons

Nerve

A bundle of nerve fibers

Nodes of Ranvier

gaps in the myelin sheath

Nuclei

clusters of cell bodies in the CNS

Proprioceptors

monitor the position and movement of skeletal muscles and joints

Schwann cells

Supporting cells of the peripheral nervous system that produce myelin.

Synapse

A junction where information is transmitted from one neuron to the next.

Stimuli

Changes, occurring within or outside the body, that affect nervous system functioning.

Tract

Bundle of nerve processes inside the CNS

Menigies

dura mater, arachnoid membrane, pia mater

Dura Mater

outermost covering of the brain, composed of tough connective tissue

Arachnoid Mater

Middle Meningeal layer of protection like a cobweb

Pia Mater

innermost covering of the brain delicate and vascular

3 Glands in the Brain

pituitary, pineal, hypothalamus

Pituitary gland

master gland

Pineal gland

reticular system wake/sleep cycle

4 different Lobes

frontal, parietal, occipital, temporal