Transport across cell membrane

Question 1

regulating control by which a constant internal environment is maintained despite external changes

Answer 1

Homeostasis

Question 2

protein with carbohydrate attached

Answer 2

Glycoprotein

Question 3

lipid with carbohydrate attached

Answer 3

Glycolipid

Question 4

describes the structure of the plasma membrane as a mosaic of components

Answer 4

Fluid Mosaic Model

Question 5

______ molecules have unequal sharing of electrons among atoms

Answer 5

Polar

Question 6

______molecules have equal sharing of electrons among atoms

Answer 6

Non Polar

Question 7

are found on the exterior and interior surfaces of membranes

Answer 7

Peripheral Proteins

Question 8

are always found on the exterior surface of cells and are bound either to proteins

Answer 8

Carbohydrates

Question 9

Exist in the membrane as separate but loosely attached molecules

Answer 9

Integral proteins and lipids

Question 10

unsaturated hydrocarbon tails with kinks

Answer 10

Fluid

Question 11

Saturated hydrocarbon tails

Answer 11

Viscous

Question 12

2 major ways molecules move across a membrane

Answer 12

passive transport
active transport

Question 13

molecules move from high to low concentration

Answer 13

Passive Transport

Question 14

Molecules move from low to high concentration

Answer 14

Active Transport

Question 15

naturally occurring phenomenon and does not require the cell to exert and of its energy

Answer 15

Passive Transport

Question 16

a physical space in which there is a range of concentrations of a single substance

Answer 16

Concentration Gradient

Question 17

Passive Transport (3)

Answer 17

simple diffusion
facilitated diffusion
osmosis

Question 18

movement if a substance from a place of higher concentration to a place of lower concentration

Answer 18

Simple Diffusion

Question 19

all molecules that are ions and polar need a help of transport proteins

Answer 19

facilitated diffusion

Question 20

Factors that affect diffusion

Answer 20

• Steepness
• Mass of the molecules diffusing
• Temperature
• Solvent Density
• Solubility
• Surface area and thickness of plasma membrane
• distance Travelled

Question 21

water travels in a fast rate across the membrane, it padded through protein channel known as _______

Answer 21

Osmosis
Aquaporins

Question 22

water moves from the inside of the cell

Answer 22

Hypertonic

Question 23

solution reach equilibrium

Answer 23

Isotonic

Question 24

concentration of solutes is higher inside the cell

Answer 24

Hypotonic

Question 25

_______mechanisms require the use of cells energy usually in the form of atp

Answer 25

Active Transport

Question 26

involves the movement of large and polar molecules

Answer 26

Bulk Transport

Question 27

a type of active transport that moves particles such as large molecules, parts of cells and even whole cells into a cell

Answer 27

Endocytosis

Question 28

engulf and then it pulls into a vacuole

Answer 28

Phagocytosis

Question 29

allow cells to take in fluid

Answer 29

Pinocytosis

Question 30

Incoming substances need to bind receptors to get into the cell

Answer 30

receptor mediated endocytosis

Question 31

reverse reaction of endocytosis

Answer 31

Exocytosis