Question 1

Which of the following is not a function of membrane proteins?

Accepted Answer

A) Transport of polar molecules 
B) Transport of H+ into the cell 
C) Binding sites for vesicles 
D) Cell recognition 
E) Passageway for water molecules 
A) Transport of polar molecules 
B) Transport of H+ into the cell 
C) Binding sites for vesicles 
D) Cell recognition 
E) Passageway for water molecules B

Question 2

Use the figure above to answer the corresponding questions.Assume the membrane is always permeable to water.
-In beaker 1, the solution on the right side of the membrane
a.could eventually have the same concentration of green solute particles as the solution on the left side of the membrane
b.could eventually have the same osmolarity as the solution on the left side of the membrane
c.currently has a lower osmotic pressure than the solution on the left side of the membrane
d.is currently losing water
e.all of these

Accepted Answer

e

Question 3

Which statement about the rate of diffusion through a lipid bilayer membrane is incorrect?

Accepted Answer

A) Smaller substances diffuse faster than larger substances. 
B) Lipid-soluble items diffuse faster than water-soluble items. 
C) Items diffuse through narrow membranes faster than through thick membranes. 
D) The presence of microvilli decreases the rate of diffusion. 
E) A greater concentration gradient causes faster diffusion. 
A) Smaller substances diffuse faster than larger substances. 
B) Lipid-soluble items diffuse faster than water-soluble items. 
C) Items diffuse through narrow membranes faster than through thick membranes. 
D) The presence of microvilli decreases the rate of diffusion. 
E) A greater concentration gradient causes faster diffusion. D

Question 4

The SGLT carrier moves ____________________ molecules uphill against a concentration gradient while moving ____________________ ions down a concentration gradient.

Accepted Answer

The answer of The SGLT carrier moves ____________________ molecules uphill...

Question 5

With secondary active transport, sodium ions move along a concentration gradient but against an electrical gradient.

Accepted Answer

A) True 
 B)False

Question 6

Because of the presence of tight junctions, passage of materials across an epithelial barrier must take place between the cells, not through them.

Accepted Answer

A) True 
 B)False

Question 7

Two ATP molecules could provide energy for a sodium-potassium pump to move ____ ions out of the cell for every ____ ions it moves into the cell.

Accepted Answer

A) 6 Na+; 3 K+ 
B) 2 Na+; 3 K+ 
C) 3 K+; 6 Na+ 
D) 3 K+; 2 Na+ 
E) 12 Na+; 6 K+ 
A) 6 Na+; 3 K+ 
B) 2 Na+; 3 K+ 
C) 3 K+; 6 Na+ 
D) 3 K+; 2 Na+ 
E) 12 Na+; 6 K+

Question 8

In the lipid bilayer of the plasma membrane, the hydrophobic tails of the phospholipids orient toward the center of the membrane, away from water.

Accepted Answer

A) True 
 B)False

Question 9

____________________ refers to the transfer of a phosphate group from ATP to a protein, thereby bringing about a change in the shape and function of the protein.

Accepted Answer

The answer of ____________________ refers to the transfer of a...

Question 10

Membrane carbohydrates in the plasma membrane combine with other molecules to form glycoproteins and ____________________.

Accepted Answer

The answer of Membrane carbohydrates in the plasma membrane combine...

Question 11

Which of the following is correct?

Accepted Answer

A) Exocytosis decreases the surface area of the plasma membrane. 
B) Endocytosis can help remove cytoplasmic debris from inside the cell. 
C) Exocytosis is triggered by the binding of a particle in the ECF to a receptor site on the plasma membrane. 
D) Exocytosis involves passive movement of material out of the cell. 
E) None of these. 
A) Exocytosis decreases the surface area of the plasma membrane. 
B) Endocytosis can help remove cytoplasmic debris from inside the cell. 
C) Exocytosis is triggered by the binding of a particle in the ECF to a receptor site on the plasma membrane. 
D) Exocytosis involves passive movement of material out of the cell. 
E) None of these.

Question 12

During osmosis,

Accepted Answer

A) water moves away from the solution with the higher osmotic pressure. 
B) water moves into a hypotonic solution. 
C) the solute moves against its concentration gradient. 
D) all of the above events would occur. 
E) none of the above events would occur. 
A) water moves away from the solution with the higher osmotic pressure. 
B) water moves into a hypotonic solution. 
C) the solute moves against its concentration gradient. 
D) all of the above events would occur. 
E) none of the above events would occur.

Question 13

Which one of the following requires assisted membrane transport?

Accepted Answer

A) Glucose moving into a cell 
B) K+ ions moving out of a cell 
C) Water moving toward a hypertonic solution 
D) Movement of ECF into a cell via pinocytosis 
E) Movement of Na+ through a symporter 
A) Glucose moving into a cell 
B) K+ ions moving out of a cell 
C) Water moving toward a hypertonic solution 
D) Movement of ECF into a cell via pinocytosis 
E) Movement of Na+ through a symporter

Question 14

A solution containing the same concentration of solute particles as human cells is said to be ____________________ to the cell.

Accepted Answer

The answer of A solution containing the same concentration of...

Question 15

Indicate whether the force in question tends to move the involved ion into or out of the cell by filling in the blank using the following code.
a.tends to move the ion into the cell
b.tends to move out of the cell
-Concentration gradient for Na⁺ at resting potential

Accepted Answer

The answer of Indicate whether the force in question tends...

Question 16

Cystic fibrosis is caused by abnormal

Accepted Answer

A) accumulation of mucus 
B) levels of insulin 
C) chloride channels in plasma membranes 
D) potassium channels in plasma membranes 
E) sodium-potassium pumps 
A) accumulation of mucus 
B) levels of insulin 
C) chloride channels in plasma membranes 
D) potassium channels in plasma membranes 
E) sodium-potassium pumps

Question 17

At the equilibrium potential for an ion, its ____________________ gradient is exactly counterbalanced by its ____________________ gradient.

Accepted Answer

concentrat

Question 18

The two types of ____________________ transport include active transport and ____________________.

Accepted Answer

carrier-me

Question 19

The membrane potential that exists when the concentration and electrical gradients for a given ion exactly counterbalance each other is known as the ____________________.

Accepted Answer

equilibriu

Question 20

Calcium and sodium ions are in a higher concentration in the ECF than in the cytosol, whereas potassium and chloride ions are in a higher concentration in the cytosol.

Accepted Answer

A) True 
 B)False

Which of the following is not a function of membrane proteins?

Which statement about the rate of diffusion through a lipid bilayer membrane is incorrect?

The SGLT carrier moves molecules uphill against a concentration gradient while moving ions down a concentration gradient.

With secondary active transport, sodium ions move along a concentration gradient but against an electrical gradient.

Because of the presence of tight junctions, passage of materials across an epithelial barrier must take place between the cells, not through them.

Two ATP molecules could provide energy for a sodium-potassium pump to move ions out of the cell for every ions it moves into the cell.

In the lipid bilayer of the plasma membrane, the hydrophobic tails of the phospholipids orient toward the center of the membrane, away from water.

____________________ refers to the transfer of a phosphate group from ATP to a protein, thereby bringing about a change in the shape and function of the protein.

Membrane carbohydrates in the plasma membrane combine with other molecules to form glycoproteins and ____________________.

Which of the following is correct?

During osmosis,

Which one of the following requires assisted membrane transport?

A solution containing the same concentration of solute particles as human cells is said to be ____________________ to the cell.

Indicate whether the force in question tends to move the involved ion into or out of the cell by filling in the blank using the following code. a.tends to move the ion into the cell b.tends to move out of the cell -Concentration gradient for Na⁺ at resting potential

Cystic fibrosis is caused by abnormal

At the equilibrium potential for an ion, its gradient is exactly counterbalanced by its gradient.

The two types of transport include active transport and .

The membrane potential that exists when the concentration and electrical gradients for a given ion exactly counterbalance each other is known as the ____________________.

Calcium and sodium ions are in a higher concentration in the ECF than in the cytosol, whereas potassium and chloride ions are in a higher concentration in the cytosol.

Introduction to Physiology and Homeostasis

Cell Physiology

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Afferent Division Special Senses

The Peripheral Nervous System: Efferent Division

Muscle Physiology

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

Principles of Endocrinology: the Central Endocrine Glands

The Peripheral Endocrine Glands

The Reproductive System

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Exam 3: The Plasma Membrane and Membrane Potential

Which of the following is not a function of membrane proteins?

Which statement about the rate of diffusion through a lipid bilayer membrane is incorrect?

The SGLT carrier moves ____________________ molecules uphill against a concentration gradient while moving ____________________ ions down a concentration gradient.

With secondary active transport, sodium ions move along a concentration gradient but against an electrical gradient.

Because of the presence of tight junctions, passage of materials across an epithelial barrier must take place between the cells, not through them.

Two ATP molecules could provide energy for a sodium-potassium pump to move ____ ions out of the cell for every ____ ions it moves into the cell.

In the lipid bilayer of the plasma membrane, the hydrophobic tails of the phospholipids orient toward the center of the membrane, away from water.

____________________ refers to the transfer of a phosphate group from ATP to a protein, thereby bringing about a change in the shape and function of the protein.

Membrane carbohydrates in the plasma membrane combine with other molecules to form glycoproteins and ____________________.

Which of the following is correct?

During osmosis,

Which one of the following requires assisted membrane transport?

A solution containing the same concentration of solute particles as human cells is said to be ____________________ to the cell.

Indicate whether the force in question tends to move the involved ion into or out of the cell by filling in the blank using the following code. a.tends to move the ion into the cell b.tends to move out of the cell -Concentration gradient for Na⁺ at resting potential

Cystic fibrosis is caused by abnormal

At the equilibrium potential for an ion, its ____________________ gradient is exactly counterbalanced by its ____________________ gradient.

The two types of ____________________ transport include active transport and ____________________.

The membrane potential that exists when the concentration and electrical gradients for a given ion exactly counterbalance each other is known as the ____________________.

Calcium and sodium ions are in a higher concentration in the ECF than in the cytosol, whereas potassium and chloride ions are in a higher concentration in the cytosol.

Introduction to Physiology and Homeostasis

Cell Physiology

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Afferent Division Special Senses

The Peripheral Nervous System: Efferent Division

Muscle Physiology

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

Principles of Endocrinology: the Central Endocrine Glands

The Peripheral Endocrine Glands

The Reproductive System

Filters

The SGLT carrier moves molecules uphill against a concentration gradient while moving ions down a concentration gradient.

Two ATP molecules could provide energy for a sodium-potassium pump to move ions out of the cell for every ions it moves into the cell.

At the equilibrium potential for an ion, its gradient is exactly counterbalanced by its gradient.

The two types of transport include active transport and .