quiz 2 corrections

Question 1

When a cell is placed in a(n) ____ solution, the concentration of the solute outside of the cell is higher than it is inside.

Answer 1

hypertonic

Question 2

If a cell is in a solution that has a lower concentration of solute, the cell is said to be in a _____ solution.

Answer 2

hypotonic

Question 3

Which type of transport across the plasma membrane involves the use of carrier proteins?

Answer 3

pumps

Question 4

The a(n) side of the U-shaped tube shown in the illustration had a lower concentration of sugar than the a(n) side before osmosis occurred.

Answer 4

1. left

2. right

Question 5

Select the statements about the sodium-potassium ATPase pump that are true.

Answer 5

The pump uses the energy to transport three sodium ions out of the cell while moving two potassium ions into the cell.
he pump maintains the level of sodium ions (Na+) and potassium ions (K+) inside and outside the cell.

Question 6

When water moves into and out of a cell at the same rate, and a cell retains is normal shape, the cell is most likely in a(n) ____ solution.

Answer 6

isotonic

Question 7

n which type of solution is a cell when concentration of the solute outside of the cell is higher than it is inside?

Answer 7

hypertonic

Question 8

Pumps, endocytosis, and exocytosis are all forms of ____ transport, meaning that they require an input of energy.

Answer 8

active

Question 9

Select statements about exocytosis that are true.

Answer 9

Cells use exocytosis to expel wastes and to secrete substances, such as hormones, produced by the cell.

Question 10

Together, the different types of transport allow a cell to interact with its environment while maintaining

Answer 10

homeostasis

Question 11

The ___ ___ ___ is the model used to describe a plasma membrane in which molecules can float.

Answer 11

fluid mosaic mode

Question 12

The plasma membrane is composed of a ____ ____, in which two layers of phospholipids are arranged tail-to-tail.

Answer 12

phospholipid bilayer