Nervous System Flashcards Preview

Honors Anatomy & Physiology > Nervous System > Flashcards

Flashcards in Nervous System Deck (14):
1

What is the nervous system known for ? (2)

Master controlling & communication system
4.5 lbs or 3% of body mass

2

Sensory function involves?

Detect internal/external stimuli
Sensory info sent to brain & spinal cord

3

What is the integrative function?

Processes sense info
Analyze, stores, & response decisions

4

What does the motor function include?

After integration
Make appropriate response
Activates effectors (muscles & glands)

5

Organization of the nervous system has 2 categories . What are they?

Central & peripheral nervous system

6

Central nervous system (CNS) consists of?

Brain -100 billion neurons
Spinal cord - 100 million neurons

7

Central nervous system (CNS) function?

Function: processes sensory info
Source of thoughts, emotions, memories
Signals muscles to contract & glands to secrete

8

Peripheral nervous system (PNS) consists of?

Consists of (outside of CNS): cranial & spinal nerves
Ganglia
Sense receptors
Enteric plexuses

9

Peripheral nervous system (PNS) function?

Links nerve impulses of body to CNS

10

Divisions of peripheral NS?

Somatic NS
Autonomic NS
Enteric NS

11

Somatic NS
Actions?
Functions?

Sensory neurons convey info to CNS
-from head, body wall, & limbs
-from special senses (vision, hearing, etc)
Conduct impulses from CNS to skeletal muscles only!
Actions: Voluntary control

12

Autonomic NS
Actions?
Functions?

Sensory neurons convey to CNS
-from sense receptors in visceral organs
Motor neurons conduct impulses from CNS to
- smooth & cardiac muscle
- glands
Actions: involuntary

13

Enteric NS
Composed of?
Functions/causes what?
Actions?

100 million neurons cover length of gastrointestinal tract
Monitors chemical changes in GI tract
Causes contraction of smooth muscle in GI tract (smooth muscle, glands, and endocrine cells of GI tract)
Enables secretions of GI fluids & hormones
Actions: involuntary control

14

3 functions of nervous system

Sensory
Integrative
Motor