Osmosis And Others

Question 1

Diffusion equals

Answer 1

High concentration to low concentration

Question 2

Osmosis equals

Answer 2

Pure water to solution

Question 3

Osmosis definition

Answer 3

The diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane.

Question 4

What is surface area to volume ratio

Answer 4

Surface area to volume ratio calculates the cube of the volume surface area and ratio.

Question 5

What is a turgid?

Answer 5

Plant cells become “turgid” when they are put in dilute solutions.

Question 6

What is the difference between osmosis diffusion and active transport

Answer 6

Diffusion is the movement of particles from a high to lower concentration. Osmosis is the diffusion of water across a membrane. Active transport moves particles from low to higher concentration.

Question 7

how are substances transported into and out of cells by diffusion

Answer 7

molecules moving from an area of high concentration to an area of low concentration.

Question 8

how are substances transported into and out of cells by osmosis

Answer 8

water molecules move across a concentration gradient

Question 9

how are substances transported into and out of cells by active transport

Answer 9

combines with a membrane-bound carrier, which then releases the chemically unchanged substance inside the cell.

Question 10

The effective ness of an exchange surface is increased by

Answer 10

Having a large surface area
A membrane that is thin, to provide a short diffusion path
(In animals) having a efficient blood supply

Question 11

What are some of the substances transported in and out of cells?

Answer 11

Some of the substances transported in and out of cells by diffusion are oxygen and
carbon dioxide in gas exchange, and of the waste product urea from cells into the
blood plasma for excretion in the kidney.

Question 12

factors that affect the rate of diffusion are:

Answer 12

•the difference in concentrations (concentration gradient) •the temperature
•the surface area of the membrane

Question 13

How does the small intestine and lungs in mammals, gills in fish, and the roots and leaves in plants, are adapted for exchanging materials.

Answer 13

is increased by: Having a large surface area. A membrane that is thin, to provide a short diffusion path. (in animals) Having an efficient blood supply.

Question 14

How do you calculate rate of water uptake?

Answer 14

Water uptake (grams/hour) = Mass Change (grams) x60 divided by time measured (minutes)

Question 15

What is the function of mitchondria

Answer 15

The mitochondria is the powerhouse of the cell

Question 16

Function for chloroplast

Answer 16

produce energy through photosynthesis and oxygen