Bio Chapters 7-8 HW

White blood cells engulf bacteria through what process? 1. Phagocytosis 2.receptor-mediated exocytosis 3. osmosis 4. pinocytosis 5. exocytosis

1. Phagocytosis

The mechanism by which oxygen (O2) crosses a plasma membrane is 1. Phagocytosis 2. diffusion 3. osmosis 4. active transport 5. pinocytosis

2. Diffusion

In a hypotonic solutoin, an animal cell will__ 1. neither gain nor lose water 2. lose water 3. shrivel 4. Lyse

4. Lyse

Which of the following types of molecules are the major structural components of the cell membrane? 1. Nucleic acids and proteins 2. glycoproteins and cholesterol 3. proteins and cellulose 4. phospholipids and proteins 5. phospholipids and cellulose

4. phospholipids and protiens

Water quickly passes across the cell membranes because 1. it is a small, polar,charged molecule. 2. the phospholipid bi-layer is hydrophilic. 3. it moves through hydrophobic channels. 4. water movement is tied to ATP hydrolysis 5. it moves through aquapornis in the membrane.

5. it moves through aquapornis in the membrane.

Which of the following molecules would NOT be able to enter the cell via passive transport? Water a large, hydrophilic protein a small, hydrophobic lipid Oxygen (O2)

A large, hydrophilic

A chemical reaction that stores energy and is endergonic would be described as______. Catabolic Anabolic Metabolic

Anabolic

A hypertonic solution has a water concentration greater than that is found inside the cell. True False

False

Endergonic reactions release energy True False

False

Exocytosis is defined as a ell taking in a molecule True False

False

If you place a red blood cell in a solution of 0.009% NaCl the cell will shrink. True False

False

Phagocytosis is NOT a type of active transport True False

False

Receptors are required during the process of diffusion. True False

False

Both phagocytosis and pinocytosis are forms of endocytosis True False

Treu

ATP is derived from the nucleotide, adenine, and three phosphates. True False

True

Sodium-potassium pumps use active transport to maintain a lower concentration of sodium inside the cell than outside the cell. True False

True

The higher the temperature, the faster the rate of diffusion. True False

True

Water is transported across the plasma membrane with the help of specialized water channels called aquaporins. True False

True

Which of these processes can move a solute against its concentration gradient? Osmosis Facilitated diffusion diffusion passive transport active transport

active transport

The sum of all chemical reactions in an organism is called catabolism anabolism metabolism

metabolism