Term
| Does every cell of the body have membrane potential? |
|
Definition
|
|
Term
| What makes the cell more negative inside? |
|
Definition
|
|
Term
|
Definition
| Uses ATP, moves potassium into the cell and sodium out of the cell |
|
|
Term
| What is the name for the pump? |
|
Definition
|
|
Term
| What is Sodium-potassium ATPase? |
|
Definition
Active transport (antiport)
Each pumping cycle pumps Na out and K in for 1 ATP
|
|
|
Term
How many Na come out, K in, and how many ATP are used in Sodium-potassium ATPase?
|
|
Definition
|
|
Term
| What is the stable membrane potential of most cells? |
|
Definition
|
|
Term
| What do excitable cells incude? |
|
Definition
| neurons and muscles cells |
|
|
Term
| What can generate changes in their membrane potentials? |
|
Definition
|
|
Term
| What are the functions of the Nervous systems? |
|
Definition
sensory input
integration
motor output |
|
|
Term
| Do the nervous systems functions overlap? |
|
Definition
|
|
Term
|
Definition
cell that is designed for comunication
longest cells in the body
lots of branches |
|
|
Term
| Where does the neuron communicate? |
|
Definition
|
|
Term
| What are neurons like for sensory, motor, and interner neurons? |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| How fast do neurons move? |
|
Definition
|
|
Term
| What is action potential? |
|
Definition
|
|
Term
| What is hyperpolarization? |
|
Definition
| making the cell more negative direction |
|
|
Term
| What is the treshold potential? |
|
Definition
|
|
Term
| what is resting potential? |
|
Definition
|
|
Term
|
Definition
|
|
Term
| What kind of volted gated channel are there?? |
|
Definition
|
|
Term
|
Definition
Produced by pufferfish
blocks Na channels |
|
|
Term
| What would be the effect of ingesting tetrodotoxin? |
|
Definition
| Mimics sodium, except not sodium. Blocks sodium channels. Stops breathing, goes into respiritory rest. |
|
|
Term
|
Definition
| What happens at the level of the ion channels |
|
|
Term
| What are High performance axons? |
|
Definition
| Faster signal conduction that allows more raphid coordination between sensory input and motor output |
|
|
Term
| What are 2 ways to increase action potential transmission speed? |
|
Definition
increase axon diameter
nodes of Ranvier |
|
|
Term
| What are nodes of Ranvier? |
|
Definition
Insulating layer on axon results from schwann cells
small gaps of exposed axon surface are present between Schawann cell |
|
|
Term
| What is the transmitting cell called? |
|
Definition
|
|
Term
| What are two types of synapse? |
|
Definition
|
|
Term
| What is the name for recieving synapse? |
|
Definition
|
|
Term
IClicker Question: Nerve gases like sarin and VX block the acetylcholinesterease that degrades ACh neurotransmitter.
If nerva gas results in a Na+ channel stuck open, the membrane potential would remain:
-70mV
50mV
0 |
|
Definition
|
|
