Question 1

Which of the following solutions has a lower osmotic pressure than a human cell's cytosol?

Accepted Answer

A)  one containing only 2% NaCl 
B)  one containing only 200 mOsm of NaCl 
C)  one containing only 0.9% NaCl 
D)  one containing only 300 mOsm of NaCl 
E)  one containing only 280 mOsm of glucose 
A)  one containing only 2% NaCl 
B)  one containing only 200 mOsm of NaCl 
C)  one containing only 0.9% NaCl 
D)  one containing only 300 mOsm of NaCl 
E)  one containing only 280 mOsm of glucose B

Question 2

Complete each of the following statments.
The SGLT carrier moves ____________________ molecules uphill against a concentration gradient while moving ____________________ ions down a concentration gradient.

Accepted Answer

glucose, Na+

Question 3

Collagen

Accepted Answer

A)  provides tensile strength to the cytoskeleton 
B)  is most abundant in tissues that stretch and then recoil 
C)  forms the intercellular filaments of desmosomes 
D)  is the most abundant protein in the ECM 
E)  all of these 
A)  provides tensile strength to the cytoskeleton 
B)  is most abundant in tissues that stretch and then recoil 
C)  forms the intercellular filaments of desmosomes 
D)  is the most abundant protein in the ECM 
E)  all of these D

Question 4

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 5

At the equilibrium potential for K+, the concentration and electrical gradients for K+ are in opposition to each other and exactly balance each other so there is no net movement of K+.

Accepted Answer

A) True 
 B)False

Question 6

Complete each of the following statments.
Ions pass into or out of the cell through protein ____________________ and ____________________ in the plasma membrane.

Accepted Answer

The answer of Complete each of the following statments.
Ions pass...

Question 7

Complete each of the following statments.
Membrane carbohydrates in the plasma membrane combine with other molecules to form glycoproteins and ____________________.

Accepted Answer

The answer of Complete each of the following statments.
Membrane carbohydrates...

Question 8

Which statement about the plasma membrane is true?

Accepted Answer

A)  It appears trilaminar under a light microscope. 
B)  Its glycocalyx serves as receptor sites for binding chemical messengers in the ECF. 
C)  It is impermeable to lipid-soluble substances. 
D)  Some of its carriers transport ions. 
E)  Its channels are impermeable to any substance smaller than 0.8 nm in diameter. 
A)  It appears trilaminar under a light microscope. 
B)  Its glycocalyx serves as receptor sites for binding chemical messengers in the ECF. 
C)  It is impermeable to lipid-soluble substances. 
D)  Some of its carriers transport ions. 
E)  Its channels are impermeable to any substance smaller than 0.8 nm in diameter.

Question 9

Complete each of the following statments.
The ____________________ equation equates the equilibrium potential for an ion with the ion's concentration difference outside and inside the cell.

Accepted Answer

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

Question 10

Most gases and small ions are highly soluble in lipids and can, therefore, pass easily between phospholipid molecules in the plasma membrane.

Accepted Answer

A) True 
 B)False

Question 11

Complete each of the following statments.
____________________ is responsible for maintaining the fluid nature of the plasma membrane in human cells.

Accepted Answer

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

Question 12

Match between columns
                        Premises: elastin
collagen
keratin
fibronectin

Accepted Answer

The Answer of Provides tensile strength to the ECM and is...

Question 13

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.	could eventually have the same number of red solute particles as the solution on the left side of the membrane
b.	could eventually have the same concentration of red particles as the solution on the left side of the membrane
c.	currently has a higher osmotic pressure than the solution on the left side of the membrane
d.	is currently gaining water
e.	all of these

Accepted Answer

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

Question 14

Complete each of the following statments.
A deficiency in channels that allow ____________________ ions to pass through cell membranes is responsible for cystic fibrosis.

Accepted Answer

The answer of Complete each of the following statments.
A deficiency...

Question 15

Potassium ions are attracted toward a more positively charged area along an electrical gradient, while chloride ions are attracted toward a more negatively charged area.

Accepted Answer

A) True 
 B)False

Question 16

Which statement about gap junctions is incorrect?

Accepted Answer

A)  They consist of protein. 
B)  They are anchored to plaques on the inside surface of the plasma membrane. 
C)  They allow materials to pass from one cell into an adjacent cell. 
D)  They play a role in transmitting electrical activity through the heart. 
E)  They consist of connexons. 
A)  They consist of protein. 
B)  They are anchored to plaques on the inside surface of the plasma membrane. 
C)  They allow materials to pass from one cell into an adjacent cell. 
D)  They play a role in transmitting electrical activity through the heart. 
E)  They consist of connexons.

Question 17

Identify the incorrect statement about the plasma membrane.

Accepted Answer

A)  Cholesterol contributes to its stability. 
B)  Its lipids may surround CAMs. 
C)  Its primary components are glycoproteins and cholesterol. 
D)  Its lipid bilayer is flexible. 
E)  Its glycocalyx is in contact with ECF. 
A)  Cholesterol contributes to its stability. 
B)  Its lipids may surround CAMs. 
C)  Its primary components are glycoproteins and cholesterol. 
D)  Its lipid bilayer is flexible. 
E)  Its glycocalyx is in contact with ECF.

Question 18

At resting membrane potential

Accepted Answer

A)  The membrane is more permeable to K+ than to Na+. 
B)  The membrane is more permeable to Na+ than to K+. 
C)  Cl- is at its equilibrium potential. 
D)  The membrane is more permeable to K+ than to Na+, and Cl- is at its equilibrium potential. 
E)  The membrane is more permeable to Na+ than to K+, and Cl- is at its equilibrium potential. 
A)  The membrane is more permeable to K+ than to Na+. 
B)  The membrane is more permeable to Na+ than to K+. 
C)  Cl- is at its equilibrium potential. 
D)  The membrane is more permeable to K+ than to Na+, and Cl- is at its equilibrium potential. 
E)  The membrane is more permeable to Na+ than to K+, and Cl- is at its equilibrium potential.

Question 19

Complete each of the following statments.
Cell adhesion proteins include ____________________ and ____________________.

Accepted Answer

cadhe rins

Question 20

Carrier-mediated transport

Accepted Answer

A)  involves a specific membrane protein 
B)  always moves substances against a concentration gradient 
C)  always requires energy expenditure 
D)  involves protein channels 
E)  all of these 
A)  involves a specific membrane protein 
B)  always moves substances against a concentration gradient 
C)  always requires energy expenditure 
D)  involves protein channels 
E)  all of these

Exam 3: The Plasma Membrane and Membrane Potential

Which of the following solutions has a lower osmotic pressure than a human cell's cytosol?

Complete each of the following statments. The SGLT carrier moves ____________________ molecules uphill against a concentration gradient while moving ____________________ ions down a concentration gradient.

Collagen

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

At the equilibrium potential for K+, the concentration and electrical gradients for K+ are in opposition to each other and exactly balance each other so there is no net movement of K+.

Complete each of the following statments. Ions pass into or out of the cell through protein ____________________ and ____________________ in the plasma membrane.

Complete each of the following statments. Membrane carbohydrates in the plasma membrane combine with other molecules to form glycoproteins and ____________________.

Which statement about the plasma membrane is true?

Complete each of the following statments. The ____________________ equation equates the equilibrium potential for an ion with the ion's concentration difference outside and inside the cell.

Most gases and small ions are highly soluble in lipids and can, therefore, pass easily between phospholipid molecules in the plasma membrane.

Complete each of the following statments. ____________________ is responsible for maintaining the fluid nature of the plasma membrane in human cells.

Complete each of the following statments. A deficiency in channels that allow ____________________ ions to pass through cell membranes is responsible for cystic fibrosis.

Potassium ions are attracted toward a more positively charged area along an electrical gradient, while chloride ions are attracted toward a more negatively charged area.

Which statement about gap junctions is incorrect?

Identify the incorrect statement about the plasma membrane.

At resting membrane potential

Complete each of the following statments. Cell adhesion proteins include ____________________ and ____________________.

Carrier-mediated transport

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

Complete each of the following statments. The SGLT carrier moves molecules uphill against a concentration gradient while moving ions down a concentration gradient.

At the equilibrium potential for K⁺, the concentration and electrical gradients for K⁺ are in opposition to each other and exactly balance each other so there is no net movement of K⁺.

Complete each of the following statments. Ions pass into or out of the cell through protein and in the plasma membrane.

Complete each of the following statments. Cell adhesion proteins include and .