Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
Normal Size Small Size show me how
Slides 31-60
| Term | Definition |
|---|---|
| What are some examples of channels? | Water, Ion, Open, and Gated |
| What does a uniport carrier do? | Transports one substrate across a membrane |
| What does a symport carrier do? | Transports two or more substrates in the same direction across a membrane |
| What does an antiport carrier do? | Transports substrates in opposite directions |
| How does the GLUT transporter move glucose from the ECF to ICF? | GLUT features a binding site for glucose that has a high affinity for it on the ECF side, opens to the ICF, and loses affinity for glucose allowing it to detach and move into the ICF |
| How does the liver store glucose? | GLUT transporters move glucose in and then glucose is converted into glucose 6-phosphate, keeping intracellular glucose concentration low so more can keep coming in. |
| What does NaK ATPase do? | Moves 3 sodium out of the cell and two potassium into the cell with the help of ATP |
| How does sodium-glucose co-transport work? | SGLT protein has a high affinity for sodium, which attaches and creates an affinity for glucose. Sodium moves down its gradient, taking glucose with it |
| What does the nervous system consist of? | The central and peripheral nervous system |
| What are the two divisions of the peripheral nervous system? | The afferent and the efferent divisions |
| What is the acronym to remember the divisions of the PNS and what they do? | SAME DAVE; sensory afferent motor efferent and dorsal afferent ventral efferent |
| What effects does the sympathetic nervous system have on the body? | Fight or flight response; examples such as increased heart rate, pupil dilation, digestion inhibition |
| What effects does the parasympathetic nervous system have on the body? | Relaxes body after stress/danger; examples such as decreasing heart rate, pupil constriction, increasing bile secretion |
| What are interneurons? | neurons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor outputs |
| What are some examples of glial cells? | Ependymal cells, Astrocytes, Microglia, Oligodendrocytes, Schwann cells, and Satellite cells |
| What glial cells are part of the central nervous system? | Ependymal cells, Astrocytes, Microglia, and Oligodendrocytes |
| What glial cells are part of the peripheral nervous system? | Schwann cells and Satellite cells |
| What glial cells form myelin sheaths? | Oligodendrocytes and Schwann cells |
| What serves as the trigger zone in a neuron? | Axon hillock |
| What are nodes of Ranvier? | Sections in between myelinated portions of the axon that are unmyelinated |
| What is a graded potential? | variable-strength signals that travel over short distances and lose strength as they travel through the cell |
| What is important to remember about graded potentials? | If the stimulus is strong enough to produce a graded potential that reaches the trigger zone, and action potential results |
| What causes graded potentials to lose strength? | Current leak and cytoplasmic resistance |
| What is an action potential? | very brief, large depolarizations that occur at the trigger zone and travel for long distances through the neuron without losing strength (all-or-none) |
| Conduction | high-speed movement of an action potential along an axon |
| Spatial summation | The sum of multiple subthreshold signals resulting in an action potential |
| Synaptic Inhibition | one inhibitory postsynaptic potential sums with two excitatory postsynaptic potentials to prevent an action potential in the postsynaptic cell; can occur at the cell body or at one presynaptic axon terminal |
| What describes a divergent pathway? | one presynaptic neuron branches to affect a larger number of postsynaptic neurons |
| What describes a convergent pathway? | many presynaptic neurons provide input to influence a smaller number of postsynaptic neurons |
| Where is sodium the most concentrated and where does it move? | Outside the cell, and moves into the cell |
Created by:
Snicolev
Popular Physiology sets