Shared Flashcard Set

Details

Elizabeth Koch
Medical Nervous System
10
Medical
Not Applicable
07/28/2016

Additional Medical Flashcards

 


 

Cards

Term
  • afferent(sensory)
Definition

carry or move inward toward a central structure

afferent "impulses" travel toward the central nervous system

Term
efferent(motor)
Definition

carry or move away from a central structure

In the nervous system "impulses" move away from the central nervous system

Term
neurons
Definition

"transmit" impulses 

3 major structures

  1. cell body
  2. axon
  3. dendrite

 

Term
meninges
Definition
membranes covering the brain and spinal cord
Term
PNS Peripheral Nervous System
Definition
Term
blood brain barrier
Definition
Protective mechanism that blocks specific substances found in the bloodstream from entering delicate brain tissue
Term

PNS

Peripheral Nervous System

Definition
The peripheral nervous system (PNS) is composed of all nervous tissue located outside the spinal column and skull. It consists of sensory neurons, which carry impulses from the body to the CNS (afferent), and motor neurons, which carry impulses from the brain and spinal cord to muscles and glands (efferent). It is further divided into the somatic nervous system and the autonomic nervous system, which is subdivided into the sympathetic and parasympathetic divisions.
Term
Thalamus
Definition
The (9) thalamus receives all sensory stimuli except olfactory and processes and transmits them to the appropriate centers in the cerebral cortex. In addition, the thalamus receives impulses from the cerebrum and relays them to efferent nerves.
Term
somatic nervous system
Definition
Motor impulses transmitted to muscles under conscious control (walking and talking) belong to the somatic nervous system.
Term
autonomic nervous system
Definition

 Motor impulses transmitted to glands and muscles not under conscious control (heart rate, respiration, digestion, pupil diameter, and so forth) belong to the autonomic nervous system.

 

  • sympathetic
  • parasympathetic
 
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