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The Cell in Action
Chapter 4 study guide St. Mark
25
Science
7th Grade
11/06/2014

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Term
The Cell Membrane
Definition
What Part of the cell do materials pass through to get into and out of the cell?
Term
Osmosis
Definition
The diffustion of water across the cell membrane
Term
It shrivles up
Definition
What happens to a red blood cell in very salty water?
Term
It expands
Definition
Whthappens to a red blood cell in pure water?
Term
They merge together
Definition
Membranes can be compared a little bit ot soap bubbles. What happens when bubbles collide? What happens when a bubble is cut in two?
Term
They are too big to get in
Definition
Why can water and oxygen travel freely through the cell membrane and sugar and amino acids can't?
Term
What is Passive transport
Definition
diffusion of particle through the protiens
Term
what is Active Transport?
Definition
The movement of particles through protiens agains the normal direction of diffusion
Term
ATP
Definition
What molecule gives the cell energy for active transport?
Term
What is fermentation? How is it similar to cellular respiration? How is it different?
Definition

Both Fermentaion and Cellular respiration break down food molecules in order to release the stored energy.

CR =uses oxygen

Fermentation= does not use oxygen

Term
Gradient concentration
Definition
a gradual change in the concentration of materials between two regions resulting in movement along the gradient.
Term
Equilibrium
Definition
The condition in which all acting influences are balanced restulting in a stable system
Term
Passive Transprot
Definition
diffusion of particles through the protiens from area of high concentration to a lower concentration
Term
Diffusion
Definition
the movement of particles from an area of high concentration to a lower concentration
Term
Osmosis
Definition
diffusion of water through a cell membrane
Term
Selectively permeable membrane
Definition
A cell membrane that allows certain molecules to pass through it by active or passive transprot
Term
active transport
Definition
the movement of particles through protiens against the normal direction of diffasion: from low to high concentration
Term
Endocytosis
Definition
cell membrane surrounds and encloses a particle into a vesicle
Term
Exocytosis
Definition
when a large particle is removed from the cell
Term
photosynthesis
Definition
a process where plants capture sunlight and change it into food
Term
cellular respiration
Definition
breaking down food molecules using oxygen to release stored energy
Term
Fermentation
Definition
breaking down food molecules not using O2 to release stored energy
Term
Balanced equation for what occurs in photo synthesis
Definition
6CO2+6H20+light--6cH12O6+6O2
Term
What is the balanced equation for cellular respiration?
Definition
C6H12O6+6O2----6CO2+6H2O+ATP
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