Name: ______Date: ______Per. ______

Unit 4- Cell Boundary & Transport Warm-ups

Day 1

(Review past material)

  1. Glycogen is best described as a
  2. complex carbohydrate that is often stored inred blood cells
  3. complete protein necessary for the synthesis of cell membranes
  4. polysaccharide that is synthesized and stored within the human liver
  5. by-product of sucrose digestion within the pancreas
  1. An iodine solution is placed on the cut side of a potato. Within seconds, a blue-black color appears. What is most likely occurring?

  1. A positive test for proteins
  2. A positive test for carbohydrates
  3. A positive test for lipids
  4. A positive test for nucleic acids

  1. What is the function of the cell membrane? ______
  2. What is the cell membrane made up of? ______

Day 2

  1. The plasma membrane of a cell consists of
  2. protein molecules arranged in two layers with polar areas forming the outside of the membrane.
  3. two layers of lipids organized with the nonpolar tails forming the interior of the membrane.
  4. lipid molecules positioned between two carbohydrate layers.
  5. protein molecules with polar and nonpolar tails.
  1. The diagram shows a section of a cell membrane that includes a channel protein. The function of this protein is to —
  1. strengthen the outer boundary of the cell
  2. connect reproductive cells during fertilization
  3. allow certain substances to enter or leave the cell
  4. exchange organelles or chromosomes between specialized cells
  1. The cell membrane of the red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Because other substances are blocked from entering, this membrane is called
  2. perforatedb. semi-permeablec. non-conductived. permeable

Day 3

  1. Which of these processes is demonstrated by the experiment shown in the diagram?
  2. cellular respirationc. active transport

b. endocytosisd. diffusion

  1. What is the primary difference between diffusion and osmosis?
  2. Diffusion requires energy input but osmosis does not.
  3. Diffusion does not require energy input but osmosis does.
  4. Diffusion is the movement of water from high to low concentration, while osmosis is the movement of any substance from high to low concentration.
  5. Diffusion is the movement of any substance from high to low concentration, while osmosis is the movement of water from high to low concentration.
  1. Based on the distribution of these molecules, what would most likely not happen after a period of time?
  2. The concentration of O2will increase inside the cell.
  3. The concentration of CO2 will decrease inside the cell.
  4. The concentration of O2will remain the same outside the cell.
  5. The concentration of CO2 will increase outside the cell.

Day 4

  1. In most simple multicellular plants and in hydra, transport throughout the organism is a result of diffusion through
  2. tracheal tubesb. vascular tissuec. gastrovascular cavitiesd. cell membranes
  1. A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which has occurred?
  2. The swollen gums have absorbed the saltwater solution
  3. The saltwater solution lowers the temperature of the water in the gums
  4. The salt in the solution has moved against the concentration gradient
  5. The water in the gums has moved from a high to a low concentration of water

The diagram below represents movement of a large molecule across a membrane

  1. Which process is best represented in this diagram?
  2. active transport
  3. diffusion
  4. passive transport
  5. osmosis

Amoebas eat algae, bacteria, plant cells, and microscopic protozoa and metazoa - some amoebas are parasites. They eat by surrounding tiny particles of food with pseudopods, forming a bubble-like food vacuole. The food vacuole digests the food. Wastes and excess water are transported outside the cell by contractile vacuoles.

  1. The picture above represents which of the following processes:
  2. Osmosisb. Diffusionc. Endocytosisd. Exocytosis

The U-tube in the figure below is divided in the middle by a membrane that is impermeable to starch but permeable to water. A 10% starch solution is put into the right-hand half of the tube and an equal amount of 6% starch solution is put into the left-hand half of the tube.

  1. In this situation pictured to the right,:
  1. water will move from the right to the left
  2. water will move from the left to the right
  3. water will move in both directions, but more from right to left than left to right
  4. water will move in both directions, but more from left to right than right to left
  1. Placing wilt lettuce in cold water will make it crisp again. Which statement best describes what happens to restore the lettuce to its original condition?
  2. Water left the lettuce cells by diffusion.
  3. Water entered the cells of the lettuce by osmosis.
  4. Osmosis caused salts to enter the lettuce cells.
  5. Salts in the leaf caused water to leave the cells.