Chapter 1 , 4 , 9 Flashcards
The type of neuron that takes impulses to muscles
Motor efferent
THe part of a neuron that conducts impulses away from its cell body
Axon
A bundle of myelinated fibers outside of the CNS
Nerve
The insulating material of peripheral neuron fibers
Myelin
Cells of the nervous system with the ability to carry impulses
Neurons
Name the three main functions of the nervous system
Sensation, integration, and motor
Another name for a motor neuron
Efferent
Composed of neurons surrounded by vertebral column
Spinal cord
Extend from the brain contain pairs I-XII
Cranial nerves
Groups of cell bodies outside the CNS
Ganglia
Extend from the spinal cord contain pairs 1-31
Spinal nerves
Structures that detect changes in the enviornment
Sensory receptors
Bundles of many axons outside of the CNS
Nerves
Neurons enclosed by the skull
Brain
Network of nerves in the gastrointestinal tract
Enteric plexus
Masses of myelinated nerve fibers paper this color
White
Neuron that conveys information from a receptor to the CNS
Sensory afferent
Unmyelinated gap in the myelin sheath
Nodes of ranvier
Neuron that conveys information from the Zcna to an effector
Motor efferent
The portion of a neuron containing the nucleus
Cell body
A group of cell bodies in the PNS
Ganglion
Long cylindrical process that conducts impulses towards another neuron
Axon
Produces the myelin sheath in the PNS
Schwann cell
Bundle of many axons in the CNS
Tract
Rounded structure at the distal end of the axon terminal
End bulb
Substance that increases the speed of nerve impulse conduction
Myelin
Group of cell bodies in theCNS
Nucleus
Highly branched input part of a neuron
Dendrites
Bundle of many axons in the PNS
Nerves
The branch of the nervous system described as fight or flight
Sympathetic
The science of structure and the relationships among structures
Anatomy
The science of body functions of the body parts
Physiology
What cavity consists of the cranial cavity and the vertebral canal
Dorsal cavity
What cavity are the viscera including the heart lungs and intestines in
Ventral
Of the two major body cavities which appears to be better protected by the bone
Dorsal
Pleural mediastinal and pericardial are terms that refer to regions of what cavity
Thoracic
What cavity are the lungs located in
Pleural
The stomach pancreas small intestine and most of the large intestine are located in the
Dorsal cavity