Internal And External Environments Of Cells

Question 0

Lipophilic

Answer 0

Fat loving therefore is hydrophobic (water hating)

Question 1

Plasma Membrane

Answer 1

Semi permeable - allow the passage of some substance but not others. Movement of substance through cell membrane occur in three ways: pores (tiny spaces in bilayer, through which water and other ions may pass through), lipids (substances such as alcohol that are lipid soluble (lipophilic) which dissolve through membrane) and channels (two types: one penetrates through membrane which allow passage of larger molecules or those studded in membrane a facilitate movement of substances that are lipophobic)

Question 2

Lipophobic

Answer 2

Fat hating therefore is hydrophilic (water loving)

Question 3

Facilitated Diffusion

Answer 3

Movement of molecules from areas of high concentration to low concentration through protein channels and carrier molecules and does not require energy.

Question 4

Active Transport

Answer 4

Movement of molecules from areas of low concentration to areas of higher concentration. Require energy and is done through carrier proteins.

Question 5

Bulk Transport

Answer 5

The movement of large amounts of fluids (pinocytosis) or solids (phagocytosis) into and out of a cell. Endocytosis (into cell) and exocytosis (out of cell).

Question 6

Passive Transport

Answer 6

Requires no energy. Includes diffusion (high to low), osmosis (water moving) and facilitated diffusion (high to low).

Question 7

Surface area to volume ratio

Answer 7

Larger area means less surface area: takes longer for materials/substances to be transferred in and out of cell. Smaller objects are more efficient. Volume (LWH), SA (sides times length times width)