bio test 3 - lecture 3

Question 1

Definition of osmosis

Answer 1

movement of water to a high concentration of solutes

Question 2

Water flow is facilitated by _____ (special channels for water) in the plasma membrane of most cells

Answer 2

diffusion (special channels for water)

Question 3

hyperosmotic

Answer 3

high concentration of solutes

Question 4

hypoosmotic

Answer 4

low concentration of solutes

Question 5

isosmotic

Answer 5

equal concentration of solutes inside and oiut

Question 6

There are many different ways organisms can maintain their osmotic balance. Which statement accurately describes the methods we discussed in class?

Answer 6

Turgor pressure-pressure presses the plasma membrane firmly against the interior of the cell wall

Question 7

According to the video Osmosis, the movement of water molecules traveling across a cell membrane is ________ which means it does not require energy. Fill in the blanks

Answer 7

According to the video Osmosis, the movement of water molecules traveling across a cell membrane is passive transport, which means it does not require energy. Fill in the blanks.

Question 8

According to the video Osmosis, a low water concentration likely means there is a _______solute concentration. Water has the tendency to move to areas where there is a ____ solute concentration, which would mean less water concentration. Fill in the blanks.

Answer 8

According to the video Osmosis, a low water concentration likely means there is a greater solute concentration. Water has the tendency to move to areas where there is a higher solute concentration, which would mean less water concentration. Fill in the blanks.

Question 9

. According to the video Osmosis, if you want to easily figure out where the water will travel, what will you look for within the cell (or its environment)?

Answer 9

Look to the side where there is a greater solute concentration

Question 10

What is the definition of hydrostatic pressure regarding osmosis?

Answer 10

-the pressure of the cytoplasm pushing OUT against the cell —> (animal + plant)

Question 11

50. What is the definition of turgor pressure regarding osmosis?

Answer 11

-Pressure presses the plasma membrane firmly against the interior of the cell wall —> (plant)

Question 12

51. What is the definition of osmotic pressure regarding osmosis?

Answer 12

-pressure that must be applied to stop the osmotic movement —-> (water)