Chapter 7

41 terms by smashley2232 

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anatomy

axon terminal

conducts electrical currents toward the cell body

axon

releases neurotransmitters

myelin sheaths

location of the nucleus

cell body

generally conducts impulses away from the cell body

myelin

increases the speed of impulse transmission

cerebrum

the largest part of the brain

ventricles

cavities found in the brain

cerebrospinal fluid

ventricles contain _______ ________

somatic reflex

patellar reflex

autonomic reflex

pupillary light reflex

somatic reflex

effectors are skeletal muscles

autonomic reflex

effectors are smooth muscle and glands

somatic reflex

flexor reflex

autonomic reflex

regulation of blood pressure

autonomic reflex

salivary reflex

concussion

slight and transient brain injury

contusion

traumatic injury that destroys brain tissue

coma

total nonresponsivness to stimulation

intracranial hemorrhage

may cause medulla oblogata to be wedge into foramen magnum by pressure of blood

cerebral edema

after head injury, retention of water by brain

cerebrovascular accident

results when a brain region is deprived of blood or exposed to prolonged ischemia

alzheimers disease

progressive degeneration of the brain with abnormal protein deposits

multiple sclerosis

autoimmune disorder with extensive demyelination

transient ischemic attack

a mini-stroke, fleeting symptoms of a CVA

cutaneous sense organs

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

schwann cells

specialized cells that myelinate the fibers of neurons found in the PNS

synapse

junction or point of close contact between neurons

tract

bundle of nerve processes inside the cns

association neuron

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

nodes of ranvier

gaps in a myelin sheath

ganglion

collection of nerve cell bodies found outside the cns

efferent neuron

neuron that conducts impulses away from the cns to muscles and glands

proprioceptors

sensory receptors found in muscle and tendons that detect their degree of stretch

stimuli

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

afferent neuron

neuron that conducts impulses toward the CNS from the body periphery

neurotransmitters

chemicals released by neurons that stimulate other neurons, muscles, or glands

neuroglia

support, insulate, and protect cells

demonstrate irritability and conductivity

neurons

neuron

release neurotransmitters

neurons

are amitotic

neuroglia

able to divide; therefore are responsible for most brain neoplasms

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