Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
What does the nervous system do?
|
It regulates body activities by responding rapidly through impulses
|
|
|
What is the nervous system responsible for?
|
All your perceptions, behaviors, memories, and movements
|
|
|
Name the 3 groups of basic functions:
|
Afferent (sensory), Integrative (interneurons), Efferent (motor)
|
|
|
What happens during sensory function?
|
Sensory receptors detect internal stimuli, such as an increase in blood acidity, or external stimuli, such as a raindrop lanind on your arm. This sensory info is caried into the brain and spinal cord thru cranial and spinal nerves
|
|
|
What happens during integrative function?
|
The nervous system processes sensory info by analyzing and storing some of it, and by making decisions for appropriate responses-an activity known as INTEGRATION.
|
|
|
What consists of the CNS (Central Nervous System)?
|
The brain and spinal cord
|
|
|
What consists of the PNS (Peripheral Nervous System)?
|
Everything else! All nervous tissue outside the CNS, nerves, ganglia, enteric plexuses, and sensory receptors.
|
|
|
What happens during depolarizing phase?
|
The negative membrane potential becomes less negative, reaches zero, and then becomes positive.
|
|
|
What happens during repolarizing?
|
The membrane potential is restored to the resting state of -70 mV
|
|
|
What is a normal threshold?
|
-55 mV in most neurons
|
|
|
What is a subthreshold stimulus?
|
Weak stimulus, will not cause depolarization (not enough flick so that the dominoes will go)
|
|
|
What is a threshold stimulus?
|
Just strong enough for depolarization (strong enough flick so that dominoes will start falling)
|
|
|
What is a suprathreshold stimulus?
|
More than enough strength. (dominoes will definitely fall)
|
|
|
Graded potentials produce...
|
short distance communication
|
|
|
Action potentials produce...
|
Long distance communication
|
