Summer Physiology- 6 hw

Moves 3 Na out and 2 k in

Na/K pump

Endocrine signaling is ____

slow and long-distance

osmosis is the movement of______

water

Potassium is the most permeable ion at rest.

true

the equilibrium potential represents: ______

voltage when one ion is at balance

facilitated diffusion:_______

uses carrier proteins

lipid-soluble molecules:_____

cross membrane and bind intracellular receptors

Osmosis pressure is:____

force that stops osmosis

diffusion is best described as:_____

random notion with net movement from high to low concentration

G-proteins:____

activate intracellular pathways

G-proteins have 3 subunits.

true

active transport moves substances against their gradient.

true

secondary active transport depends on:____

ion gradients

the Na/K pump moves: ____

3 Na out, 2 K in

osmosis depends on solute concentration.

true

secondary messenger amplifies signaling.

true

binds signaling molecule

receptor

has three subunits and activates pathways

G-protein

amplifies signal inside the cell

second messenger

voltage when cell is not activity signaling

resting membrane potential

voltage when one ion is balanced

equilibrium potential

the Na'/K pump is electrogenic.

true

paracrine signaling effects:____

nearby cells

What can diffuse directly through the cell membrane?

small nonpolar molecules and uncharged polar molecules

resting membrane potential is positive inside the cell.

false

cell shrinks

hypertonic

cell swells

hypotonic

no net water movement

isotonic

All solutions are osmotically active.

false

active transport requires:___

ATP and carrier proteins

Ex: hormones traveling through bloodstream

endocrine

local signaling to nearby cells

paracrine

uses neurotransmitters at synapses

synaptic

diffusion requires energy.

false

a hypotonic solution will cause a cell to: ____

swell

second messengers:___

amplify signaling

hypertonic solutions cause cell to:____

shrink

synaptic signaling involves

neurotrasmitters

movement from high to low concentration

diffusion

passive movement using carrier proteins

facilitated diffusion

movement of water across a membrane

osmosis

movement requiring ATP against gradient

active transport

the resting membrane potential is most influenced by:___

potassium

endocrine signaling acts locally.

false

carrier mediated transport includes:_____

competition, specificity, and saturation

endocytosis is:____

movement into the cell via vesicles