Chapter 3 Test Review

Where are stellate cells found in the body?

• nervous system
• muscle cells
• circulatory system
• urinary system

What molecule makes up the cell membrane?

• steroids
• phosphates
• phospholipids
• none of the above

What is another name for the cell membrane?

• steroid bilayer membrane
• phospholipid single layer membrane
• steroid single layer membrane
• phospholipid bilayer membrane

What is the role of cholesterol in the membrane?

• it keeps the membrane solid
• it helps keep the membrane fluid
• it allows the membrane to be semipermeable
• it allows for cellular processes in the membrane to happen at a faster rate

What is a leak channel?

• requires a chemical messenger to open the channel
• freely lets ions go into or out of the cell through the channel
• requires an electrical stimulation to open the channel
• none of the above

What is a ligand gated channel?

• requires a chemical messenger to open the channel
• freely lets ions go into or out of the cell through the channel
• requires an electrical stimulation to open the channel
• none of the above

What is a voltage gated channel?

• requires a chemical messenger to open the channel
• freely lets ions go into or out of the cell through the channel
• requires an electrical stimulation to open the channel
• none of the above

What molecules flow into/out of the sodium potassium pump and how many?

• 2 Na out; 3 K in
• 2 Cl out; 3 Na in
• 3 Na out; 2 K in
• 3 Cl out; 2 Na in

What is the role of the sodium potassium pump?

• keeps the inside of the cell more negative and the outside of the cell more positive
• keeps the inside of the cell more positive and the outside of the cell more negative
• keeps both the inside and outside of the cell more negative
• keeps both the inside and outside of the cell more positive

What does the G protein in the second messenger system do?

• it activates the enzyme needed to carry out metabolic processes
• it deactivates the enzyme needed to carry out metabolic process
• it will convert ATP to cAMP
• A&B