WorksheetsMembrane Function and Tonicity
Total questions: 22
Worksheet time: 11mins
The plasma membrane:
a. provides a protective barrier around the cell
b. separates the inner contents of the cell from the outer environment
c. regulates the molecules that can pass in or out of the cell
d. all of the above
Cholesterol aids in the fluidity of the plasma membrane.
True
False
A phospholipid molecule consists of _____ phosphate “head,” which is _____and a _____ lipid “tail,” which is _____.
a. polar, hydrophilic;
non-polar, hydrophobic
b. non-polar, hydrophilic; polar, hydrophobic
Passive transport is the movement of substances across the membrane without the use of cellular energy, while active transport is the movement of substances across the membrane using energy from ATP.
True
False
What factor does NOT affect the rate of diffusion?
a. temperature
b. molecular weight
c. surface area
d. electrical charges
The image shows the process of:
a. simple diffusion
b. active transport
c. osmosis
d. filtration
The image shows the process of:
a. filtration
b. simple diffusion
c. facilitated diffusion
Which of the following is CORRECT about hypertonic solutions?
a. Hypertonic solutions cause cells to remain constant because it has an equal concentration of water.
b. Hypertonic solutions cause cells to shrink as water leaves the cell
c. Hypertonic solutions cause cells to swell and possibly burst as water enters the cell
Which of the following is INCORRECT?
a. Endocytosis is the process of a cell ingesting material by enveloping it in a portion of its cell membrane.
b. Exocytosis is the process of a cell exporting material using vesicular transport.
c. Phagocytosis is the ingestion of solid material and surrounding fluids.
What molecules can pass through the cell membrane by simple diffusion?
Small uncharged molecules such as O2, CO2, urea, H2O, etc.
Large uncharged molecules such as glucose and sucrose
Ions such as H+, Na+, K+, Cl-, etc.
The kidney removes waste from the blood through
Osmosis
Diffusion
Filtration
Water crosses the plasma membrane through water pores called
Aquaporins
nuclear pore
channel proteins
The secretion of insulin from the pancreas is an example of what type of bulk transport
Exocytosis
Phagocytosis
Pinocytosis
Endocytosis
The sodium-potassium ATPase pump is a/an:
Uniport
Symport
Antiport
The sodium-potassium ATPase pump transports ____ ions out of the cell and ____ ions into cell
3 Na+; 2 K+
2 Na+; 3 K+
2 K+; 3 Na+
3 K+; 2 Na+
What is the function of proteins in the cellular membrane?
a. Cellular respiration
b. Cell transport
c. Communication
Which of the following uses a vesicle to transport substances INTO the cell?
a. Simple diffusion
b. Endocytosis
Exocytosis
Osmosis
Facilitated diffusion move substances across the membrane with the aid of:
a. Membrane proteins
b. Cholesterol
c. Vesicle
Which of the following types of transport is involved in nerve signaling?
a. Osmosis
b. Diffusion
c. Endocytosis
d. Sodium-potassium pump
Which of these often serve as receptors or cell recognition molecules on cell surfaces?
a. transmembrane proteins
b. integral proteins
c. peripheral proteins
d. integrins
e. glycoproteins
Which of the following is true of integral membrane proteins?
a. They lack tertiary structure.
b. They are loosely bound to the surface of the bilayer
c. They are usually transmembrane proteins
d. They are not mobile within the bilayer.
e. They serve only a structural role in membranes.
In order for a protein to be an integral membrane protein it would have to be which of the following?
a. hydrophilic
b. hydrophobic
c. amphipathic
d. completely covered with phospholipids
