LAB Ch 4a Week 2

Question 1

What does a cell membrane do?

Answer 1

Helps maintain homeostasis with his pores allowing things in and out.

Question 2

What are three ways particles move through the Cell membrane?

Answer 2

Filtration diffusion and osmosis

Question 3

What is the filtration?

Answer 3

The removal of particles in suspension by passing the mixture through a membrane of specific poor size.

Question 4

What is the Diffusion?

Answer 4

Is the net movement of particles from an area of high concentration to an area of lower concentration movement along the concentration gradient.

Question 5

What is filtrate?

Answer 5

The resulting fluid that passed through a membrane the pores

Question 6

What is equilibrium?

Answer 6

When the concentration of particles on either side of the membrane are equal.

Question 7

Is a common example of diffusion?

Answer 7

The movement of oxygen and carbon dioxide into an out of the cell

Question 8

What is osmosis?

Answer 8

The diffusion of water across a semi permeable membrane or a selectively permeable membrane. This is concerned primarily with water.

Question 9

What are three types of solutions?

Answer 9

Hypertonic hypotonic isotonic

Question 10

What is a hypertonic solution?

Answer 10

A solution with more solute particles outside of the cell than inside the cell.

Question 11

What is a hypotonic solution

Answer 11

A solution with less solute outside of the cell than inside the cell

Question 12

What is an isotonic solution

Answer 12

Solution with equal amounts of solute inside and outside of the cell.

Question 13

What is Crenate?

Answer 13

On the cell shrinks and wrinkles as a result of water moving out of the cell while in a hypertonic solution.

Question 14

What is hymolysis?

Answer 14

The swelling of a cell and it bursts as a result of water moving into the cell while in a hypotonic solution.

Question 15

What is the indicator for the presence of starch? What color change is seen.?

Answer 15

Iodine tests for the presence of starch. It changes from an amber yellow with no starch to a blue black when starch is present.

Question 16

Explain the dialysis experiment and the results.

Answer 16

2 permeable balloons filled with a starch and salt solution were immersed in 2 bowls containing a solution of distilled water. Bowl a head I don’t applied to it to test for the presence of starch. Bowl b had silver nitrate added to it to test for the presence of salt. In Bowl a the starch particles were too big to go through the Membrane. In Bowl b salt was small enough to go through the membrane.

Question 17

What is the indicator for the presence of salt and what color change is seen?

Answer 17

Silver nitrate tests for the presence of salt. It changes from clear no salt to a milky white indicating salt present.