Diffusion and Active Transport AP Biology

Diffusion is described as the movement of molecules through a semi-permeable membrane from an area of higher concentration to an area of lower concentration

• True

• False

Tags

NGSS.MS-LS2-3

Which of the following was not a valid conclusion in the osmosis/diffusion lab?

• Water moved from a hypertonic solution to a hypotonic solution

• iodine moved from an area of high concentration to an area of lower concentration

• there was a net movement of glucose from the bag to the beaker

• the bag was impermeable to the starch

• the bag gained mass due to the passive movement of water into the bag

Which of the following is not a type of passive transport?

• osmosis

• diffusion

• exocytosis

• facilitated diffusion

• dialysis

When the concentration of solutes differs on the two sides of a membrane permeable only to water

• water will move across the membrane by osmosis

• water will move across the membrane by active transport

• water will move across the membrane by plasmolysis

• water will move across the membrane by facilitated diffusion

• solutes will move across the membrane from the region of higher concentration to the region of lower concentration

A saturated suspension of starch is enclosed in a bag formed from dialysis tubing, a material through which water can pass, but starch cannot. The bag with the starch is placed into a beaker of distilled water. All of the following are expected to occur EXCEPT

• There will be a net movement of water from a hypotonic region to a hypertonic region

• There will be a net movement of solute from a hypertonic region to a hypotonic region

• There will be a net movement of water from a region of higher concentration of water to a region of lower concentration of water

• The dialysis bag with its contents will gain weight

• No starch will be detected outside the bag

Tags

NGSS.MS-LS2-3

Which of the following statements is not true?

• The water in the experiment moved from the beaker into the bag through the process of osmosis

• The iodine moved from the beaker into the bag through dialysis

• The starch moved out of the bag through dialysis

• The glucose moved out of the bag through dialysis

• All other answers are true

Which of the following process requires energy?

• passive transport

• osmosis

• dialysis

• diffusion

• active transport

When placed in distilled water, a red blood cell will

• shrink

• expand and burst

• remain the same

Tags

NGSS.HS-LS1-3

The environment that your blood cells flow in via the circulatory system is considered

• isotonic

• hypotonic

• hypertonic

Tags

NGSS.HS-LS1-3

Which of the following conclusions was valid in the osmosis/diffusion lab?

• It was determined that water moved out of the beaker into the bag because the bag increased in mass

• It was determined that glucose moved out of the bag into the beaker due to a positive glucose testtab result

• It was determined that iodine moved into the bag because it reacted with the starch and caused a color change

• It was determined that the starch did not move out of the bag because there was no color change in the beaker

• All of the other answers were valid conclusions