Question 1

Describe the transport of glucose from the intestinal lumen into the intestinal cells and mention how Na+-K+ pumps make this process possible.

Accepted Answer

Glucose is transported from the intestin

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

____ are adhering junctions, ____ are impermeable junctions, and ____ are communicating junctions.

Accepted Answer

A)  Tight junctions, gap junctions, desmosomes 
B)  Desmosomes, gap junctions, tight junctions 
C)  Gap junctions, desmosomes, tight junctions 
D)  Gap junctions, tight junctions, desmosomes 
E)  none of these 
A)  Tight junctions, gap junctions, desmosomes 
B)  Desmosomes, gap junctions, tight junctions 
C)  Gap junctions, desmosomes, tight junctions 
D)  Gap junctions, tight junctions, desmosomes 
E)  none of these

Question 4

The plasma membrane

Accepted Answer

A)  has a slight excess of positive charges along its cytosol side during the resting state 
B)  is composed primarily of cholesterol surrounded by carbohydrates 
C)  is more permeable to K+ than to Na+ at the resting state 
D)  has peripheral proteins that act as carriers 
E)  all of these, except it is composed primarily of cholesterol surrounded by carbohydrates 
A)  has a slight excess of positive charges along its cytosol side during the resting state 
B)  is composed primarily of cholesterol surrounded by carbohydrates 
C)  is more permeable to K+ than to Na+ at the resting state 
D)  has peripheral proteins that act as carriers 
E)  all of these, except it is composed primarily of cholesterol surrounded by carbohydrates

Question 5

If a cell begins to swell after being placed into a salt solution, the salt solution must have a lower osmotic pressure than the cytosol.

Accepted Answer

A) True 
 B)False

Question 6

Complete each of the following statments.
Vesicles bind to ____________________ acceptors on the plasma membrane prior to exocytosis

Accepted Answer

The answer of Complete each of the following statments.
Vesicles bind...

Question 7

Use the figure above to answer the corresponding questions. Assume the membrane is always permeable to water.
In beaker 2, the solution on the right side of the membrane
  
a.	has a higher osmolarity than the solution on the left side of the membrane
b.	will gain water from the solution on the left side of the membrane
c.	has a lower osmotic pressure than the solution on the left side of the membrane
d.	has a higher osmolarity than the solution on the left side of the membrane and will gain water from the solution on the left side of the membrane
e.	none of these

Accepted Answer

The answer of Use the figure above to answer the...

Question 8

Identify the true statement(s) about the plasma membrane.

Accepted Answer

A)  Its transmembrane proteins are also peripheral proteins. 
B)  Its glycocalyx functions in cell recognition. 
C)  Its carriers contain cholesterol. 
D)  Its channels allow passage of substances between 0.8 nm and 1 nm in diameter. 
E)  Its transmembrane proteins are also peripheral proteins, and its channels allow passage of substances between 0.8 nm and 1 nm in diameter. 
A)  Its transmembrane proteins are also peripheral proteins. 
B)  Its glycocalyx functions in cell recognition. 
C)  Its carriers contain cholesterol. 
D)  Its channels allow passage of substances between 0.8 nm and 1 nm in diameter. 
E)  Its transmembrane proteins are also peripheral proteins, and its channels allow passage of substances between 0.8 nm and 1 nm in diameter.

Question 9

Facilitated diffusion

Accepted Answer

A)  involves a protein channel 
B)  requires energy expenditure 
C)  is how glucose in the intestinal lumen moves into cells in the digestive lining 
D)  involves a protein channel and is how glucose in the intestinal lumen moves into cells in the digestive lining 
E)  all of these 
A)  involves a protein channel 
B)  requires energy expenditure 
C)  is how glucose in the intestinal lumen moves into cells in the digestive lining 
D)  involves a protein channel and is how glucose in the intestinal lumen moves into cells in the digestive lining 
E)  all of these

Question 10

Complete each of the following statments.
The ____________________ refers to the maximum amount of a substance that can be transported across the plasma membrane via a carrier in a given time.

Accepted Answer

transport

Question 11

Pinocytosis refers to the process of a cell engulfing ECF, and this process increases the cell's surface area.

Accepted Answer

A) True 
 B)False

Question 12

Complete each of the following statments.
In active transport, a substance moves from an area of ____________________ concentration to an area of ____________________ concentration.

Accepted Answer

The answer of Complete each of the following statments.
In active...

Question 13

Leak channels for sodium are closed during the resting potential but open with appropriate stimulation.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following statements about the Na+-K+ pump is correct?

Accepted Answer

A)  Phosphorylation of the pump must occur before Na+ can attach to its binding site. 
B)  It has ATP synthase activity. 
C)  It helps decrease Na+ and K+ concentration gradients across the plasma membrane. 
D)  It regulates cell volume by controlling the concentration of solutes inside the cell. 
E)  It is a countertransporter for secondary active transport. 
A)  Phosphorylation of the pump must occur before Na+ can attach to its binding site. 
B)  It has ATP synthase activity. 
C)  It helps decrease Na+ and K+ concentration gradients across the plasma membrane. 
D)  It regulates cell volume by controlling the concentration of solutes inside the cell. 
E)  It is a countertransporter for secondary active transport.

Question 15

Complete each of the following statments.
____________________ refers to a separation of opposite charges across the membrane.

Accepted Answer

The answer of Complete each of the following statments.
____________________ refers...

Question 16

Complete each of the following statments.
A transport maximum is associated with carriers that perform ____________________ or ____________________ in the cell membrane.

Accepted Answer

active tra

Question 17

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 18

Complete each of the following statments. Scurvy is the result of a vitamin ____________________ deficiency and results in abnormal formation of the protein called ____________________.

Accepted Answer

The answer of Complete each of the following statments. Scurvy...

Question 19

Under normal conditions, the movement of potassium into a cell always requires the splitting of ATP.

Accepted Answer

A) True 
 B)False

Question 20

With secondary active transport, the movement of

Accepted Answer

A)  H+ out of a cell by antiport is downhill 
B)  amino acids into the cell by symport is uphill 
C)  glucose into a cell by cotransport is downhill 
D)  amino acids into the cell by symport is uphill and glucose into a cell by cotransport is downhill 
E)  none of these 
A)  H+ out of a cell by antiport is downhill 
B)  amino acids into the cell by symport is uphill 
C)  glucose into a cell by cotransport is downhill 
D)  amino acids into the cell by symport is uphill and glucose into a cell by cotransport is downhill 
E)  none of these

Exam 3: The Plasma Membrane and Membrane Potential

Describe the transport of glucose from the intestinal lumen into the intestinal cells and mention how Na+-K+ pumps make this process possible.

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

____ are adhering junctions, ____ are impermeable junctions, and ____ are communicating junctions.

The plasma membrane

If a cell begins to swell after being placed into a salt solution, the salt solution must have a lower osmotic pressure than the cytosol.

Complete each of the following statments. Vesicles bind to ____________________ acceptors on the plasma membrane prior to exocytosis

Identify the true statement(s) about the plasma membrane.

Facilitated diffusion

Complete each of the following statments. The ____________________ refers to the maximum amount of a substance that can be transported across the plasma membrane via a carrier in a given time.

Pinocytosis refers to the process of a cell engulfing ECF, and this process increases the cell's surface area.

Complete each of the following statments. In active transport, a substance moves from an area of ____________________ concentration to an area of ____________________ concentration.

Leak channels for sodium are closed during the resting potential but open with appropriate stimulation.

Which of the following statements about the Na+-K+ pump is correct?

Complete each of the following statments. ____________________ refers to a separation of opposite charges across the membrane.

Complete each of the following statments. A transport maximum is associated with carriers that perform ____________________ or ____________________ in the cell membrane.

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

Complete each of the following statments. Scurvy is the result of a vitamin ____________________ deficiency and results in abnormal formation of the protein called ____________________.

Under normal conditions, the movement of potassium into a cell always requires the splitting of ATP.

With secondary active transport, the movement of

Introduction to Physiology and Homeostasis

Cell Physiology

Principles of Neural and Hormonal Communication

A--The Central Nervous System

B--The Central Nervous System

A--The Peripheral Nervous System: Afferent Division; Special Senses

B--The Peripheral Nervous System: Afferent Division; Special Senses

The Peripheral Nervous System: Efferent Division

A--Muscle Physiology

B--Muscle Physiology

A--Cardiac Physiology

B--Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

A--The Respiratory System

B--The Respiratory System

A--The Urinary System

B--The Urinary System

A--Fluid and Acid-Base Balance

B--Fluid and Acid-Base Balance

A--The Digestive System

B--The Digestive System

Energy Balance and Temperature Regulation

A--Principles of Endocrinology: the Central Endocrine Glands

B--Principles of Endocrinology: the Central Endocrine Glands

A--The Peripheral Endocrine Glands

B--The Peripheral Endocrine Glands

A--The Reproductive System

B--The Reproductive System

Filters

Describe the transport of glucose from the intestinal lumen into the intestinal cells and mention how Na⁺-K⁺ pumps make this process possible.

are adhering junctions, are impermeable junctions, and are communicating junctions.

Complete each of the following statments. In active transport, a substance moves from an area of concentration to an area of concentration.

Which of the following statements about the Na⁺-K⁺ pump is correct?

Complete each of the following statments. A transport maximum is associated with carriers that perform or in the cell membrane.

Complete each of the following statments. Scurvy is the result of a vitamin deficiency and results in abnormal formation of the protein called .