Lesson 1.7

Question 1

According to this model, membrane consist of lipid by layer and globular Proteins which are in bedded within the lipid bilayer

Answer 1

Fluid mosaic Model by S. Singer and G. nicolson

Question 2

Has a hydrophobic and hydrophilic regions

Answer 2

Lipid bilayer

Question 3

Proteins also known as

Answer 3

Glycoproteins

Question 4

Lipids also known as

Answer 4

Glycolipids

Question 5

The movement of substances through membranes without using energy

Answer 5

Passive transport

Question 6

Three kinds of passive transport

Answer 6

Simple diffusion
Osmosis
Facilitated Diffusion

Question 7

Is the movement of substances from a region of higher concentration to a region of lower concentration

Answer 7

Simple diffusion

Question 8

Is a difference in concentration of a certain substance in one hour and the concentration in another Adjacent area

Answer 8

Concentration gradient

Question 9

Factors that affect diffusion across the semi permeable membrane

Answer 9

Size

Charge of particles

Question 10

Small non-polar molecules That can go in and out freely

Answer 10

H2O, 02, CO2, fatty acid‘s

Question 11

Large molecules like, cannot go in and out freely

Answer 11

Proteins and carbohydrates

Question 12

Ios such as, cannot pass through readily because of the presence of hydrophobic region

Answer 12

OH, K+, Ca+++

Question 13

The diffusion of water across a selectively Premable membrane

Answer 13

Osmosis

Question 14

Moves down it’s concentration gradient

Answer 14

Water

Question 15

Three teams that are used to indicate the differences between two solutions

Answer 15

Isotonic, hypertonic and hypotonic

Question 16

Comes from the Latin root meaning Strength

Answer 16

Suffix tonic

Question 17

Refers to the concentration of solutes in the solutions

Answer 17

Tonicity and strength

Question 18

The concentration of solutes Surrounding this so equals the concentration of solute inside the cell

Answer 18

Isotonic solution

Question 19

The concentration of solute surrounding the cell is higher than that inside the cell

Answer 19

Hypertonic solution

Question 20

If the cells loses too much water, the cell will shrink

Answer 20

Plasmolysis (or crenation in the case of animal cell)

Question 21

The concentration of solutes surrounding this song is lower that that inside the cell

Answer 21

Hypotonic solution

Question 22

place in solution of different sugar concentration

Answer 22

Red blood cells or RBC

Question 23

• Rbc an external solution or the same concentration
• water entering the RBC = water leaving
• what happens? No changes in RBC sizes

Answer 23

Isotonic

Question 24

• rbc are place in a very concentrated sugar solution
• RBC are filute compred to external solution and lose water
• waht happens? RBC Shrink

Answer 24

HYPERTONIC

Question 25

* RBC are place in dilute sugar solution * RBC take up water * What happens? RBC swell and finally burst

Answer 25

Hypotonic

Question 26

It is a form of passive transport that requires transport proteins in the membrane

Answer 26

Facilitated diffusion

Question 27

Is an example of large polar molecule that is transported through the membrane by facilitated diffusion

Answer 27

Glucose

Question 28

Bind to specific salute to be transported and cause changes in the shape of protein

Answer 28

Carrier proteins

Question 29

Not bind the solute

Answer 29

Channel proteins

Question 30

Is the movement of substances from the region of lower concentration to a region of greater concentration in the choirs expenditure cellular energy

Answer 30

Active transport

Question 31

It is one of the well studied examples of active transport

Answer 31

Sodium potassium pump

Question 32

Two types of movement across cell membrane

Answer 32

Endocytosis | Exocytosis

Question 33

The cell engulfs particles into a pouch formed bu the in folding of the cell membrane

Answer 33

Endocytosis

Question 34

Three types of endocytosis

Answer 34

Phagocytosis | Pinocytosis

Question 35

Cell eating, the cell engulfs solid particles into much larger vesicles, sometimes called VACUOLES

Answer 35

Phagocytosis

Question 36

In human, two types of white blood cells specialized in phagocytosis

Answer 36

Neutrophils | Manocytes

Question 37

cell drinking, it is similar to phagocytosis except that the cell engulfs droplets of fluid instead of solid particles, also forming latge vacuoles within it.

Answer 37

Pinocytosis

Question 38

It is the reverse of endocytosis

Answer 38

Exocytosis