Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

68C Ch.9 Ph.1 T.4

Hole's Essentials of A&P Chapter 9: Nervous System

QuestionAnswer
axon cylindrical nerve fiber that carries impulses away from a neuron cell
dendrite BRANCHED nerve cell process that serves as main receptor surface of a neuron
ganglion mass of neuron cell bodies, part of the PNS
synapse junction between two neurons
Myelin sheath Lipoprotein layer covers axons that insulate and protect. Function to increase the speed of conduction through neuron
Node of Ranvier Narrow gaps in myelin sheath between Schwann cells
Nerve cordlike bundle of peripheral axon/nerve fibers within layers of connective tissue
Neuron conduction (2 methods) a.Saltatory conduction-nerve impulse jumps across gaps along length of axon b.Continuous conduction-travel entire length of axon
Synapse junction between two communicating neurons, NOT in direct contact with each other. CHEMICAL=most common
Two factors that influence the rate of conduction of an impulse 1.axon's diameter 2.presence/absence of myelin sheath
Reflex Arc automatic subconscious responses to changes in/out of the body, synapse in the spinal cord, simplest of nerve pathways
General function of neurons react to physical and chemical changes in surroundings
Common parts of the neuron (3) Dendrite, axon, cell body
Sensory neurons afferent neurons, transmit nerve impulses from peripheral body parts into the brain/spinal cord. Long dendrite, short axon
Interneurons lie entirely within brain/spinal cord, link other neurons
Motor neurons efferent neurons, multipolar, transmit impulses out of brain/spinal cord to effectors, long axon short dendrites
Schwann cells myelin-producing neuroglia of the PNS
Neurons can be grouped in two main ways.. Structural differences(bipolar,unipolar,multipolar) and functional differences(sensory,interneurons,motor neurons)
Cerebrum largest portion of the brain associated with higher mental functions, interpretation of sensory input, initiating voluntary muscular movements
Cerebellum coordinates muscular activity, integrates sensory information about position of body parts and coordinates skeletal muscle activity
3 meninges a.dura mater b.arachnoid c.pia mater
Choriod plexuses specialized capillaries from the pia mater, secrete cerebrospinal fluid
Cerebrospinal fluid cushions brain, decreases effective weight, clear/odorless, nutritive functions
Dura mater outermost layer, tough, white fibrous connective tissue, highly vascular "tough mother"
Arachnoid Thin web-like, avascular
Pia mater thin delicate innermost layer, nerves and blood vessels
Created by: ajwildasin30
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards