Question 1

Which of the following statements about the Na+/K+ pump is FALSE?

Accepted Answer

A)  It transports Na+ out of the cell and K+ into the cell. 
B)  It is present in neurons. 
C)  Its activity requires the expenditure of metabolic (cellular) energy. 
D)  It transports Na+ and K+ in a 1:1 ratio. 
A)  It transports Na+ out of the cell and K+ into the cell. 
B)  It is present in neurons. 
C)  Its activity requires the expenditure of metabolic (cellular) energy. 
D)  It transports Na+ and K+ in a 1:1 ratio.

Question 2

Match the membrane protein with its function.
-structural proteins

Accepted Answer

A) transfer signals from the extracellular environment to the cytoplasm of the cell 
B) form cell-to-cell connections 
C) bind to molecules to facilitate entry to or exit from the cell 
D) ligands bind to these proteins and are changed by the protein 
A) transfer signals from the extracellular environment to the cytoplasm of the cell 
B) form cell-to-cell connections 
C) bind to molecules to facilitate entry to or exit from the cell 
D) ligands bind to these proteins and are changed by the protein

Question 3

Match the transport process to its description.
-a form of mediated transport

Accepted Answer

A) simple diffusion 
B) facilitated diffusion 
C) both 
D) neither 
A) simple diffusion 
B) facilitated diffusion 
C) both 
D) neither

Question 4

Which of the following molecules can move across the phospholipid bilayer by simple diffusion?

Accepted Answer

A)  lipids 
B)  steroids 
C)  water 
D)  lipids and water 
E)  All of the answers are correct. 
A)  lipids 
B)  steroids 
C)  water 
D)  lipids and water 
E)  All of the answers are correct.

Question 5

Water can cross a cell membrane by a variety of means.List at least three.Do water molecules cross a membrane through the same molecules as other solutes? Explain.Are all cells equally permeable to water? Explain.

Accepted Answer

Water can cross through the phospholipid

Question 6

Define osmolarity and tonicity.How are they similar? How are they different?

Accepted Answer

Osmolarity refers to the concentration o

Question 7

A 70-year-old man weighs 145 pounds and has 48% of his body weight in the form of water.How many liters of water is that?

Accepted Answer

0.48 × @#IMG-DLM& ×

Question 8

Describe the distribution of water in the body's fluid compartments.

Accepted Answer

67% is intracellular.
33% is e

Question 9

Indicate the relative osmolarities of the following solutions.
Solution a: 2 osmolar NaCl
Solution b: 1 molar NaCl
Solution c: 900 milliosmolar glucose
A.a is ________ osmotic to b.D.a is ________ osmotic to c.
B.b is ________ osmotic to a.E.b is ________ osmotic to c.
C.c is ________ osmotic to a.F.c is ________ osmotic to b.

Accepted Answer

This is easier to answer if all three so

Question 10

Which body fluid compartment contains higher levels of Na+,Cl-,and HCO3-?

Accepted Answer

A)  plasma only 
B)  interstitial fluid only 
C)  intracellular fluid only 
D)  both plasma and intracellular fluid 
E)  both plasma and interstitial fluid 
A)  plasma only 
B)  interstitial fluid only 
C)  intracellular fluid only 
D)  both plasma and intracellular fluid 
E)  both plasma and interstitial fluid

Question 11

Nurse Cameron has been asked to mix an isotonic intravenous solution for an emergency room patient who has lost a lot of blood.The available solutes include glucose .How should she make up 10 L of IV solution with an osmolarity of 290 mOsm (isosmotic),making sure that it will also be isotonic?

Accepted Answer

Nurse Cameron should make her solution c

Question 12

Red blood cells with an internal osmolarity of 300 mOsM are placed in the following solutions.Designate each solution according to its osmolarity and tonicity,and explain what happens to the cells and why.
A.200 mOsM NaCl
B.400 mOsM urea
C.100 mOsM urea plus 200 mOsM NaCl
D.300 mOsM urea
E.300 mOsM NaCl
F.200 mOsM urea plus 300 mOsM NaCl
G.400 mOsM NaCl

Accepted Answer

A.Hyposmotic,hypotonic.The cell swells.B

Question 13

Compare and contrast facilitated diffusion and active transport.

Accepted Answer

Both involve binding of substrate to a c

Question 14

The ability of a carrier molecule to transport only one specific molecule or a group of closely related molecules is called ________.

Accepted Answer

The answer of The ability of a carrier molecule to...

Question 15

Match the membrane protein with its function.
-receptors

Accepted Answer

A) transfer signals from the extracellular environment to the cytoplasm of the cell 
B) form cell-to-cell connections 
C) bind to molecules to facilitate entry to or exit from the cell 
D) ligands bind to these proteins and are changed by the protein 
A) transfer signals from the extracellular environment to the cytoplasm of the cell 
B) form cell-to-cell connections 
C) bind to molecules to facilitate entry to or exit from the cell 
D) ligands bind to these proteins and are changed by the protein

Question 16

Saturation occurs when

Accepted Answer

A)  molecules are moved by the use of vesicles. 
B)  the energy required to move molecules results from a high-energy bond. 
C)  a group of carrier proteins is operating at its maximum rate. 
D)  a preference of a carrier protein for a substance is demonstrated based on the differing affinities of the carrier for the substrates. 
E)  a carrier molecule has the ability to transport only one molecule or a group of closely related molecules. 
A)  molecules are moved by the use of vesicles. 
B)  the energy required to move molecules results from a high-energy bond. 
C)  a group of carrier proteins is operating at its maximum rate. 
D)  a preference of a carrier protein for a substance is demonstrated based on the differing affinities of the carrier for the substrates. 
E)  a carrier molecule has the ability to transport only one molecule or a group of closely related molecules.

Question 17

Match the transport process to its description.
-tends to create an equilibrium state

Accepted Answer

A) active transport 
B) passive transport 
A) active transport 
B) passive transport

Question 18

What are the two extracellular fluid compartments in the body?

Accepted Answer

A)  intracellular and plasma 
B)  plasma and interstitial 
C)  interstitial and intracellular 
D)  plasma and the fluid portion of the blood 
E)  None of the answers are correct. 
A)  intracellular and plasma 
B)  plasma and interstitial 
C)  interstitial and intracellular 
D)  plasma and the fluid portion of the blood 
E)  None of the answers are correct.

Question 19

Match the type of transport with its description.
-from an organ's lumen to the extracellular fluid

Accepted Answer

A) secretion 
B) paracellular transport 
C) transcellular transport 
D) absorption 
A) secretion 
B) paracellular transport 
C) transcellular transport 
D) absorption

Question 20

You are a server in a restaurant,always interested in going the extra mile for your customers.Patrick,a regular customer in your section,has ordered sweet iced tea and has an appointment in 10 minutes,so he must drink quickly then leave.The kitchen staff makes only unsweetened tea,but there are sugar packets on the tables.What should you do for Patrick to provide the best sweet tea,and what general principle of diffusion does this illustrate? (Hint: Will sugar dissolve quickly in an iced drink?)

Accepted Answer

Make sugar syrup for Patrick by heating

Exam 5: Membrane Dynamics

Which of the following statements about the Na+/K+ pump is FALSE?

Match the membrane protein with its function. -structural proteins

Match the transport process to its description. -a form of mediated transport

Which of the following molecules can move across the phospholipid bilayer by simple diffusion?

Water can cross a cell membrane by a variety of means.List at least three.Do water molecules cross a membrane through the same molecules as other solutes? Explain.Are all cells equally permeable to water? Explain.

Define osmolarity and tonicity.How are they similar? How are they different?

A 70-year-old man weighs 145 pounds and has 48% of his body weight in the form of water.How many liters of water is that?

Describe the distribution of water in the body's fluid compartments.

Which body fluid compartment contains higher levels of Na+,Cl-,and HCO3-?

Nurse Cameron has been asked to mix an isotonic intravenous solution for an emergency room patient who has lost a lot of blood.The available solutes include glucose .How should she make up 10 L of IV solution with an osmolarity of 290 mOsm (isosmotic),making sure that it will also be isotonic?

Compare and contrast facilitated diffusion and active transport.

The ability of a carrier molecule to transport only one specific molecule or a group of closely related molecules is called ________.

Match the membrane protein with its function. -receptors

Saturation occurs when

Match the transport process to its description. -tends to create an equilibrium state

What are the two extracellular fluid compartments in the body?

Match the type of transport with its description. -from an organ's lumen to the extracellular fluid

Introduction to Physiology

Molecular Interactions

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

Neurons: Cellular and Network Properties

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Cardiovascular Physiology

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

The Digestive System

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Integrative Physiology III: Exercise

Reproduction and Development

Filters

Which of the following statements about the Na⁺/K⁺ pump is FALSE?

Which body fluid compartment contains higher levels of Na⁺,Cl^-,and HCO₃^-?