BIO 251 Lab quiz 1

the random motion of molecules moving is diffusion, define

(a)  

define equilibrium

(a)  

when concentrations are not the same there is a concentration gradient, define the gradient

(a)  

when a difference in concentration exists, ____ will always occur, unless some barrier, like an _______ is placed in the way

(a)  

this molecular movement is ____ and ____. No work need be done to cause diffusion to occur.

(a)  

rate of diffusion is affected by molecular weight, concentration gradient, and temperature as follows:

1. Compounds with high molecular weights diffuse ______ (faster/slower) than with low weights

2. the greater the concentration gradient, the _____ (faster/slower) the diffusion

3. the higher the temperature of the system, the ____ the diffusion

(a)  

define osmosis

(a)  

define a semipermeable membrane

(a)  

define osmotic pressure

(a)  

since water can move freely through membranes, water will move to the compartment having (a)   (greater/lower) concentration, to decrease the difference in concentrations