Question 1

Which extracellular fiber does not develop properly in scurvy?

Accepted Answer

A)  actin 
B)  collagen 
C)  elastin 
D)  fibronectin 
E)  myosin 
A)  actin 
B)  collagen 
C)  elastin 
D)  fibronectin 
E)  myosin

Question 2

Complete each of the following statments.
A common antiporter transports ____________________ ions out of the cell while it transports ____________________ ions into the cell.

Accepted Answer

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

Question 3

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 4

Select the correct statement about diffusion through a membrane.

Accepted Answer

A)  It depends on random motion. 
B)  It involves active forces. 
C)  Its rate increases as the membrane's surface area decreases. 
D)  Ions move from a lower concentration to a higher concentration. 
E)  Large molecules diffuse faster than small molecules. 
A)  It depends on random motion. 
B)  It involves active forces. 
C)  Its rate increases as the membrane's surface area decreases. 
D)  Ions move from a lower concentration to a higher concentration. 
E)  Large molecules diffuse faster than small molecules.

Question 5

A membrane potential of -50 mV is greater than a membrane potential of -70 mV.

Accepted Answer

A) True 
 B)False

Question 6

At resting membrane potential, passive and active forces exactly balance each other so there is no net movement of ions across the membrane.

Accepted Answer

A) True 
 B)False

Question 7

Exocytosis involves expelling a substance when the plasma membrane unites with a special carrier protein.

Accepted Answer

A) True 
 B)False

Question 8

Gap junctions play an important role in transmission of impulses for heart contraction.

Accepted Answer

A) True 
 B)False

Question 9

A carrier molecule moves from the ECF side to cytosol side of the membrane as it transports material into the cell.

Accepted Answer

A) True 
 B)False

Question 10

Complete each of the following statments.
Endocytosis and exocytosis are both examples of ____________________ transport.

Accepted Answer

The answer of Complete each of the following statments.
Endocytosis and...

Question 11

The SGLT and GLUT carriers do not split ATP.

Accepted Answer

A) True 
 B)False

Question 12

The rate at which "X" can diffuse through a plasma membrane is inversely proportional to the

Accepted Answer

A)  lipid solubility of X 
B)  concentration gradient for X 
C)  molecular weight of X 
D)  membrane's surface area 
E)  lipid solubility and molecular weight of X 
A)  lipid solubility of X 
B)  concentration gradient for X 
C)  molecular weight of X 
D)  membrane's surface area 
E)  lipid solubility and molecular weight of X

Question 13

Complete each of the following statments.
Net diffusion of water down its own concentration gradient toward an area of higher solute concentration is known as ____________________.

Accepted Answer

The answer of Complete each of the following statments.
Net diffusion...

Question 14

Describe the action of a Na+-K+ pump.

Accepted Answer

Three Na⁺ ions bind to the ICF side of th

Question 15

Which of the following is least related to glucose uptake by different cells in the body?

Accepted Answer

A)  receptor-mediated endocytosis 
B)  facilitated diffusion 
C)  carrier-mediated transport 
D)  secondary active transport 
E)  cotransport 
A)  receptor-mediated endocytosis 
B)  facilitated diffusion 
C)  carrier-mediated transport 
D)  secondary active transport 
E)  cotransport

Question 16

Gap junctions function as channels in between cells.

Accepted Answer

A) True 
 B)False

Question 17

Opening a potassium channel during the resting potential would cause potassium ions to move along their concentration gradient but against the electrical gradient.

Accepted Answer

A) True 
 B)False

Question 18

Under an electron microscope, the plasma membrane appears as a trilaminar structure consisting of two light layers separated by a dark middle layer.

Accepted Answer

A) True 
 B)False

Question 19

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)  none of these 
A)  accumulation of mucus 
B)  levels of insulin 
C)  chloride channels in plasma membranes 
D)  potassium channels in plasma membranes 
E)  none of these

Question 20

Complete each of the following statments.
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

Exam 3: The Plasma Membrane and Membrane Potential

Which extracellular fiber does not develop properly in scurvy?

Complete each of the following statments. A common antiporter transports ____________________ ions out of the cell while it transports ____________________ ions into the cell.

Which one of the following requires assisted membrane transport?

Select the correct statement about diffusion through a membrane.

A membrane potential of -50 mV is greater than a membrane potential of -70 mV.

At resting membrane potential, passive and active forces exactly balance each other so there is no net movement of ions across the membrane.

Exocytosis involves expelling a substance when the plasma membrane unites with a special carrier protein.

Gap junctions play an important role in transmission of impulses for heart contraction.

A carrier molecule moves from the ECF side to cytosol side of the membrane as it transports material into the cell.

Complete each of the following statments. Endocytosis and exocytosis are both examples of ____________________ transport.

The SGLT and GLUT carriers do not split ATP.

The rate at which "X" can diffuse through a plasma membrane is inversely proportional to the

Complete each of the following statments. Net diffusion of water down its own concentration gradient toward an area of higher solute concentration is known as ____________________.

Describe the action of a Na+-K+ pump.

Which of the following is least related to glucose uptake by different cells in the body?

Gap junctions function as channels in between cells.

Opening a potassium channel during the resting potential would cause potassium ions to move along their concentration gradient but against the electrical gradient.

Under an electron microscope, the plasma membrane appears as a trilaminar structure consisting of two light layers separated by a dark middle layer.

Cystic fibrosis is caused by abnormal

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

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. A common antiporter transports ions out of the cell while it transports ions into the cell.

Describe the action of a Na⁺-K⁺ pump.