Flashcards in Chapter 17 - The Nervous System Deck (82)
Central nervous system
Brain and spinal cord
Peripheral nervous system
All nerves outside of the brain and spinal cord
Conducting tissue of the nervous system
Cells that support and protect the nervous system
Carries impulses toward the cell body
Carries impulses away from the cell body
Whitish, fatty material that insulates and protects the axon and speeds electrical conduction.
Sensory or afferent neuron
Transmits impulses toward the CNS
Motor or efferent neuron
Transmits impulses away from the CNS
Connecting cells of the CNS
Point of contact between two neurons. Energy is passed from one cell to another.
Collection of cell bodies along the pathway of a nerve
4 parts of the brain
Cerebrum, diencephalon, brain stem, and cerebellum.
Largest part of the brain. Largely composed of white matter. Thin outer layer of grey matter called the cerebral cortex
Outer layer of the cerebrum. Higher functions of memory, reason, and abstract thought occur here.
Grooves of the grey matter
Raised areas of the grey matter
Contains the thalamus, hypothalamus, and pituitary gland.
Parts of the brainstem
Midbrain, pons, medulla oblongota
Reflex centers for improved vision and hearing
Bulge on the anterior surface of the brainstem. Fibers that connect the brains different regions.
Connects the brain to the spinal cord. Vital center that controls heart rate, respiration, and blood pressure.
Divided into two hemispheres. Controls voluntary muscle movement and maintains posture, balance, and coordination.
4 of them that produce cerebral spinal fluid that acts a protective cushion.
3 protective layers that protect the brain and spinal cord
Hard outermost layer of the meninge
Thin web like middle layer of the meninge