Biology Test 2 - [Movement of substances]

Practice for Test

what does a cell need to carry many chemical reactions?

must enter and leave a cell by diffusion, osmosis and/or active site

what is diffusion?

movement from high concentration points to low concentration points

definition of osmosis?

movement of water across membrane from high to low potential

definition of active site?

energy required process to move substances against concentration gradient

higher temperature particles?

move faster and more kinetic energy to move around and more diffusion

concentration gradient?

when there’s a big difference between the numbers of particles in a place and diffusion speed will spread them out if increased

surface area to volume ratio?

the surface area of the second cell is much bigger than the first its a folded membrane

volume of cells?

second cell has a much larger surface area to VR [volume ratio] which increases rate of diffusion

Distance?

rate of diffusion is the distances particles travel shorter and faster which makes cells squish to make distance shorter

section of alveoli

air sac in lungs

living system? [diffusion]

diffuses in and out of the leaf depending on the conditions

non-living- dyes spread?

from a high concentration to low until distributed

living system [osmosis]

potato gains water in distilled water or losses water in salt solution

non-living-water?

moves from in the tube by osmosis to swell

cells need?

energy to carry out functions such as ATP

where is ATP produced?

ATP is produced in cells in the process of cellular respiration

Does ATP happen in every cell?

not in RBC’s