Chapter 5: The Working Cell part 2
The process of a white blood cell engulfing a bacteria, is
Phagocytosis.
The molecules responsible for membrane transport are
Proteins.
Cells acquire LDLs by
Receptor-mediated endocytosis.
Which of the following statements regarding active transport is false?
Active transport is given by the concentration gradient.
Which of the following processes can move a solute against its concentration gradient?
Active transport.
Which of the following processes could result in the net movement of a substance into a cell, of the substance is more concentrated in the cell than in the surroundings?
Active transport.
Which of the following statements regarding thermodynamics is false?
An automobile engine is an example of a closed system.
Glucose molecules provide energy to power the swimming motion of sperm. In this example, the sperm are changing
Chemical energy into kinetic energy.
Living systems
Decrease their entropy while increasing the entropy of the universe.
Phagocytosis is to eating as pinocytosis is to
Drinking.
Certain cells that line the stomach synthesize a digestive enzyme and secrete it into the stomach. This enzyme is a protein. Which of the following processes could be responsible for its secretion?
Exocytosis.
Which of the following energy transfers is impossible in living systems?
Heat to light energy.
In the lab, you use a special balloon that is permeable to water but not sucrose to make an "artificial cell." The balloon is filled with a solution of 20% sucrose and 80% water and is immersed in a beaker containing a solution of 40% sucrose and 60% water. The solution in the balloon is ___ relative to the solution in the beaker.
Hypotonic.
A plant cell in a hypotonic solution
Is turgid.
Kinetic energy differs from chemical energy in the
Kinetic energy is the energy of a moving object, whereas chemical energy is the potential energy of molecules.
White blood cells (WBCs) are more resistant to lysis than red blood cells (RBCs). When looking at a sample of blood for WBCs, would could you do to reduce interference from RBCs?
Mix the blood in a hypotonic solution, which will cause the RBCs to lyse.
Which of the following statements is true among all types of passive diffusion?
The concentration gradient is the driving force.
According to ___, energy cannot be created or destroyed.
The first law of thermodynamics.
in the creation A -> B + C + heat
The potential energy of the products is less than that of the reactant.
If placed in tap water, an animal cell will undergo lysis, whereas a plant cell will not. What accounts for this difference?
The relative inelasticity and strength of the plant cell wall.
A steer must eat at least 100 pounds of grain to gain less than 10 pounds of muscle tissue. This illustrated
The second law of thermodynamics.
Which of the following is a typical feature of an ATP-driven active transport mechanism?
The solute moves against the concentration gradient.
Which of the following processes is endergonic?
The synthesis of glucose from carbon dioxide and water.
Facilitated diffusion across a biological membrane requires __ and moves a substance __ its concentration gradient.
Transport proteins... down.
You are adrift in the Atlantic Ocean, and being thirsty, drink the surrounding seawater. As a result,
You dehydrate yourself.
