Exam 3 - Chapter 40 HW

Question 1

Which of the following descriptions characterizes the symport transporter?
Select one:
a. One molecule being moved in one direction.
b. Two molecules moved through in opposite directions.
c. Two molecules moved through in one direction.
d. None of these

Answer 1

c. Two molecules moved through in one direction.

Question 2

Which of the following cation is present in a higher concentration in an intracellular fluid?
Select one:
a. Calcium
b. Potassium

Answer 2

b. Potassium

Question 3

When a molecule requires a transporter to be transferred across the lipid bilayer, which of the following categories of transport does it fall under?
Select one:
a. Facilitated
b. Simple

Answer 3

a. Facilitated

Question 4

The sodium potassium ATPase pump does not do which of the following?
Select one:
a. Pump 3 moles of Na+ out and pump 2 moles of K+ in
b. Pump Na+ out and pump K+ ions in
c. Pump 3 moles of K+ ion in and pump 2 moles of Na+ in
d. Pump 2 moles of K+ in and pump out 3 moles of Na+

Answer 4

c. Pump 3 moles of K+ ion in and pump 2 moles of Na+ in

Question 5

Rapid uptake or release of glucose takes place in the liver. Which of the following glucose transporters facilitates the bidirectional transport of glucose?
Select one:
a. GLUT 1
b. GLUT 2 
c. GLUT 3
d. GLUT 4
e. GLUT 5

Answer 5

b. GLUT 2

Question 6

Which of the following has a higher permeability through a lipid bilayer?
Select one:
a. An electrolyte (or charged ion)
b. An uncharged molecule

Answer 6

b. An uncharged molecule

Question 7

Which of the following molecules are very easily transported through the plasma membrane?
Select one:
a. Lipid soluble
b. Water soluble

Answer 7

a. Lipid soluble

Question 8

Sodium is pumped out of the cell while Potassium is pumped into the cell. Which of the following ports would be able to undertake that operation?
Select one:
a. Uniport
b. Symport
c. Antiport

Answer 8

c. Antiport

Question 9

Which of the following statement is not true
Select one:
a. Phospholipids constitute one of the major components of a lipid membrane
b. Glycolipids constitute one of the major components of a lipid membrane
c. Cholesterol constitutes one of the major components of a lipid membrane
d. Triacylglycerols constitute one of the major components of a lipid membrane

Answer 9

d. Triacylglycerols constitute one of the major components of a lipid membrane

Question 10

Which of the following ions are present in a higher concentration in intracellular fluids?
Select one:
a. Phosphate
b. Chloride

Answer 10

a. Phosphate

Question 11

Which of the following membranes has a higher Lipid to protein ratio?
Select one:
a. Mitochondrial
b. Myelin 
c. Sarcoplasmic reticulum
d. Retinal rods
e. None of these

Answer 11

b. Myelin

Question 12

Which of the following hormones requires a cell surface receptor?
Select one:
a. Group I hormones
b. Group II hormones

Answer 12

b. Group II hormones

Question 13

In the transcellular movement of glucose in a intestinal cell, Glucose follows which of the following ions across the luminal epithelial membrane?
Select one:
a. Ca+2
b. K+
c. Na+ 
d. Cl-
e. PO4-3

Answer 13

c. Na+

Question 14

Lipophilic hormones molecules are classified as
Select one:
a. Group I hormones
b. Group II hormones

Answer 14

a. Group I hormones

Question 15

Active transport is down an electrochemical gradient or against an electrochemical gradient?
Select one:
a. Down an electrochemical gradient
b. Against an electrochemical gradient

Answer 15

b. Against an electrochemical gradient

Question 16

Which of the following requires energy for transport of molecules?
Select one:
a. Active transport
b. Passive transport

Answer 16

a. Active transport

Question 17

Which of the following hormones act via an intracellular receptor?
Select one:
a. Group I hormones
b. Group II hormones

Answer 17

a. Group I hormones

Question 18

Small molecules will transfer through the lipid bilayer by which of the following processes?
Select one:
a. Simple diffusion 
b. Facilitated diffusion
c. Active transport

Answer 18

a. Simple diffusion

Question 19

Which of the following is not classified as a co-transport mechanism of transport of molecules?
Select one:
a. Symport
b. Antiport
c. Uniport

Answer 19

c. Uniport

Question 20

Which of the following descriptions represents the stoichiometry of a Na+-K+ ATpase?
Select one:
a. 3 Na+ ions moving in and 1 K+ ions out.
b. 3 Na+ ions moving out and 1 K+ ions moving in.
c. 3Na+ ions moving out and 2K+ ions moving in.
d. 3Na+ ions moving out and 2K+ ions moving out.
e. 3Na+ ions moving in and 2K+ ions moving out.

Answer 20

c. 3Na+ ions moving out and 2K+ ions moving in.

Question 21

Hydrophilic hormone molecules are classified as
Select one:
a. Group I hormones
b. Group II hormones

Answer 21

b. Group II hormones

Question 22

Which of the following category of molecules would be transported using the facilitated method?
Select one:
a. Hydrophobic
b. Hydrophilic

Answer 22

b. Hydrophilic

Question 23

Which of the following molecules is transported very easily through the lipid bilayer?
Select one:
a. O2
b. Na+

Answer 23

a. O2

Question 24

Large molecules will transfer through the lipid bilayer by which of the following processes?
Select one:
a. Simple diffusion
b. Facilitated diffusion
c. Active transport

Answer 24

b. Facilitated diffusion

Question 25

Which of the following cation is present in a higher concentration in extracellular fluids?
Select one:
a. Sodium
b. Magnesium

Answer 25

a. Sodium

Question 26

Glucose and Na+ ions enter a cell via a port. Which of the following ports would you classify that port as?
Select one:
a. Uniport
b. Symport 
c. Antiport

Answer 26

b. Symport