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Keystone Biology
Homeostasis and Transport Pre Quiz
1. Materials essential to life processes move across a cell membrane through a variety of
methods. What cell membrane structure allows water-soluble materials to be passively
transported to the cytoplasm?
A. endocytosis vesicles
B. Golgi complex vesicles
C. carrier proteins
D. hydrophilic phospholipid tails
2. All cells have a protective barrier that is formed of proteins and a lipid bilayer. What is
the name of this barrier?
A. phospholipid barrier
B. cytoplasm
C. cell membrane
D. cell wall
3. Drowning is the second leading cause of accidental death for school-age children and
the number one cause of death for children under the age of 5. However, there have been
cases when children have been revived after being submerged in icy cold water for
prolonged periods of time. This occurs due to a reflex known as the mammalian diving
reflex.
When submerged in very cold water, receptors in the nasal cavity and other areas of the
face relay a message to the brain that causes it to only circulate blood between the heart
and the brain. This allows oxygen to be conserved and enhances the chance of survival.
The mammalian diving reflex is an example of the body's attempt to maintain
A. genetic viability.
B. homeostasis.
C. respiration.
D. autoimmune responses.
4. Osmosis is the diffusion of water across a selectively permeable membrane in which
water moves from a solution containing a low concentration of solute to what kind of
solution?
A.
B.
C.
D.
a solution containing only the solute
a solution containing a high concentration of water
a solution containing a high concentration of solute
a solution containing the same amount of solute
5. Materials are able to move across a cell membrane through one of two methods: active
transport or passive transport. What is the difference between active transport and passive
transport?
A.
Active transport is the only form of transport that requires the use of protein
carriers.
B.
Active transport requires the cell to expend energy, while passive transport does
not.
C.
Passive transport is the only form of transport that requires the use of protein
carriers.
D.
Active transport requires the cell to form vesicles, while passive transport requires
the use of membrane pumps.
6. During heatstroke, the body can't dispose of excess heat. As a result, the homeostatic
balance is disturbed, and internal body temperatures can reach as much as 110°.
Heatstroke is dangerous to people primarily because
A.
B.
it causes pneumonia.
blood vessels may rupture.
C.
D.
cells can't function properly at high temperatures.
blood pressure becomes too low.
7. There are two main ways in which molecules are transported into and out of cells active transport and passive transport. Which of the following statements is true of
passive transport?
A. Energy, in the form of ATP, is essential for passive transport.
B. Molecules move up a concentration gradient during passive transport.
C. Endocytosis and exocytosis are two forms of passive transport.
D. Carrier proteins are sometimes used during passive transport.
8. How is homeostasis important to the survival of organisms?
A. Homeostasis helps organisms locate food.
B. Homeostasis allows organisms to regulate their temperature.
C. Homeostasis makes organisms grow bigger and taller.
D. Homeostasis makes all organisms hibernate.
9. If the water concentration inside a cell is higher than the water concentration outside
the cell, water flows out of the cell. This method of molecular transport is called
A. endocytosis.
B. a sodium pump.
C. osmosis.
D. exocytosis.
10. The Golgi apparatus helps to maintain cellular homeostasis by
A. modifying, sorting, and packaging proteins prior to transport.
B. synthesizing ATP molecules from glucose during glycolysis.
C. transforming absorbed light energy to manufacture carbohydrates.
D. controlling which proteins are synthesized during the cell cycle.