Unit 3 - Cell Homeostasis/Transport Vocab

Question 1

Homeostasis

Answer 1

The ability to maintain internal stability in an organism in response to environmental changes

Question 2

Equilibrium

Answer 2

A state of balance

Question 3

Cell Membrane/Plasma Membrane

Answer 3

The thin outside layer that surrounds the cytoplasm of a cell and controls the movement of materials into and out of the cell

Question 4

Phospholipid Bilayer/Lipid Bilayer

Answer 4

Two layers of phospholipids that build the cell membrane

Question 5

Selectively Permeable

Answer 5

A substance that allows certain molecules to pass through it

Question 6

Pore

Answer 6

A small hole in a cell membrane that molecules pass through

Question 7

Protein Channel

Answer 7

A protein that is embedded in the cell membrane and allows larger molecules to pass through (like a tunnel)

Question 8

Embedded

(Cell Transport Definition)

Answer 8

An object that is built in or surrounded by the cell membrane

Question 9

Concentration Gradient

Answer 9

The difference in the amount (concentration) of particles is higher in one area than another, this causes molecules move to find balance

Question 10

Particle

Answer 10

A small piece of matter

Question 11

Molecule

Answer 11

A group of atoms bonded together, a small unit of chemistry

Question 12

Dynamic Equilibrium

Answer 12

When molecules are balanced and continue to move forward and backward across the membrane with chemical reactions happening simultaneously and constantly

Question 13

Cell Transport

Answer 13

The movement of substances across the cell membrane either into or out of the cell

Question 14

Passive Transport

Answer 14

Molecules and chemicals moving across membranes without using energy

Question 15

Solute

Answer 15

The substance that dissolves to form a solution

Question 16

Solvent

Answer 16

Usually a liquid substance in which other substances can be dissolved or dispersed

Question 17

Diffusion

Answer 17

A type of passive transport where molecules move from high concentration to low concentration without using energy

Question 18

Facilitated Diffusion

Answer 18

A type of passive transport and diffusion where molecules move from high concentration to low concentration without using energy but with using a protein channel

Question 19

Osmosis

Answer 19

A type of passive transport where water moves from high concentration to low concentration without using energy

Question 20

Isotonic

Answer 20

Same % water inside and outside the cell, water moves in and out to keep balance

Question 21

Hypertonic

Answer 21

More solute outside the cell than inside, water moves out to balance

Question 22

Hypotonic

Answer 22

More solute in the cells than outside, water moves in to balance

Question 23

Swell

(Osmosis)

Answer 23

The cell fills with water and gets larger

Question 24

Shrink

(Osmosis)

Answer 24

The cell loses water and gets smaller

Question 25

Active Transport

Answer 25

When molecules move across a cell membrane from a lower concentration to a higher concentration using energy and a protein pump

Question 26

ATP

(Cell Transport Definition)

Answer 26

Adenosine triphosphate is a nucleotide used in cells for energy, needed for active transport

Question 27

Protein Pump

Answer 27

Used in both active and passive transport to push molecules across the plasma membrane, embedded in the membrane