Student Exchange Programs

41.) In multicellular organisms, cells must be able to communicate with each other. Structures that enable most cells to communicate with each other are known as

1. pathogenic agents
2. chloroplasts
3. antibiotics
4. receptor molecules

6.) To communicate between cells, many multicellular animals use

1. nerve signals and respiratory gases
2. respiratory gases and hormones
3. bones and muscles
4. nerve signals and hormones

7.) After a hormone enters the bloodstream, it is transported throughout the body, but the hormone affects only certain cells. The reason only certain cells are affected is that the membranes of these cells have specific

1. receptors
2. tissues
3. antibodies
4. carbohydrates

9.) Which term includes all the activities required to keep an organism alive?

1. growth
2. excretion
3. metabolism
4. nutrition

16.) What occurs during the digestion of protein?

1. Specific enzymes break down proteins into amino acids.
2. Specific hormones break down proteins into simple sugars.
3. Specific hormones break down proteins into complex starches.
4. Specific enzymes break down proteins into simple sugars.

19.) The life function of transport in an organism directly involves those activities used to

1. absorb and distribute materials
2. obtain and hydrolyze materials
3. release energy from food
4. produce cellular waste products

26.) The end products of digestion enter the cells of a vertebrate by the process of

1. absorption
2. osmosis
3. emulsification
4. egestion

29.) Stained yeast were added to a paramecium culture, and some of the yeast were ingested by the paramecia. This activity is most closely associated with which life function?

1. synthesis
2. regulation
3. nutrition
4. growth

31.) Which statement best describes the human respiratory system?

1. It is composed of a network of moist passageways that permit air to flow from the external
environment to the lungs.
2. Each cell of the human body is in direct contact with the external environment, and gas
exchange occurs by diffusion
3. The external body surface is kept moist to allow for gas exchange.
4. Gases diffuse across membranes on both the external and internal surfaces of the body.

36.) Which process requires cellular energy?

1. diffusion
2. passive transport
3. active transport
4. osmosis

37.) Small molecules are combined to form large molecules by the life function of

1. regulation
2. excretion
3. transport
4. synthesis

38.) A student squeezes a clothespin as rapidly as possible for one minute. Without stopping to rest, the student continues to squeeze the clothespin for a second minute. At the end of the second minute, the student’s fingers and hand feel very cramped and tired. The physical tiredness and cramping in the muscles in the student’s hand were most likely due to the increased production of

1. ATP
2. waste products
3. oxygen
4. glucose

39.) Which statement best describes the plasma membrane of a living plant cell?

1. It selectively regulates the passage of substances into and out of the cell.
2. It is composed of proteins and carbohydrates only.
3. It has the same permeability to all substances found inside or outside the cell.
4. It is a double protein layer with floating lipid molecules.