Question 1

Transcellular transport across the cell is regulated by ____________________ and ____________________ proteins.

Accepted Answer

The answer of Transcellular transport across the cell is regulated...

Question 2

Membrane channels can be open or closed,but carriers are always "open for business."

Accepted Answer

A) True 
 B)False

Question 3

Figure 3-16
Answer the corresponding questions using the accompanying figure.
  
-Which labeled diagram depicts the release of the phosphate group from the pump?

Accepted Answer

A) ​1 
B) 2 
C) 3 
D) 4 
E) ​5
F)6 
A) ​1 
B) 2 
C) 3 
D) 4 
E) ​5
F)6

Question 4

Most of the abundant matrix in connective tissue is secreted by fibroblasts.

Accepted Answer

A) True 
 B)False

Question 5

A(n)____________________ exists when no net movement of any ions takes place because all passive leaks are exactly balanced by active pumping.

Accepted Answer

The answer of A(n)____________________ exists when no net movement of...

Question 6

Two properties of particles influence whether they can permeate the plasma membrane without assistance: ____.

Accepted Answer

A) ​size and the relative solubility of the particle in lipid 
B) size and the relative solubility of the particle in water 
C) shape and the relative solubility of the particle in water 
D) shape and size 
E) ​electrical charge and shape 
A) ​size and the relative solubility of the particle in lipid 
B) size and the relative solubility of the particle in water 
C) shape and the relative solubility of the particle in water 
D) shape and size 
E) ​electrical charge and shape

Question 7

What are the most abundant plasma membrane lipids?

Accepted Answer

A) ​cholesterol 
B) unsaturated fat 
C) phospholipids 
D) omega-6 fatty acids 
E) ​lecithin 
A) ​cholesterol 
B) unsaturated fat 
C) phospholipids 
D) omega-6 fatty acids 
E) ​lecithin

Question 8

What kind of junctions are impermeable junctions that join the lateral edges of epithelial cells near their luminal borders,thus preventing movement of materials between the cells?

Accepted Answer

A) ​gap junctions 
B) desmosomes 
C) luminal junctions 
D) plasma junctions 
E) ​tight junctions 
A) ​gap junctions 
B) desmosomes 
C) luminal junctions 
D) plasma junctions 
E) ​tight junctions

Question 9

Phospholipids have a(n)____________________ head containing a negatively charged phosphate group and two electrically neutral fatty acid chain tails.

Accepted Answer

The answer of Phospholipids have a(n)____________________ head containing a negatively...

Question 10

Describe the main functions of the plasma membrane.

Accepted Answer

Besides acting as a mechanical barrier t

Question 11

What are active-transport mechanisms commonly called?

Accepted Answer

A) ​bridges 
B) pumps 
C) couriers​ 
D) funnels 
E) ​engines 
A) ​bridges 
B) pumps 
C) couriers​ 
D) funnels 
E) ​engines

Question 12

The two types of secondary active transport are ____________________ and ____________________.

Accepted Answer

​symport,c

Question 13

In terms of plasma membrane transport,which descriptor is the most accurate?

Accepted Answer

A) ​permeable 
B) selectively permeable 
C) non-permeable 
D) porous 
E) ​sealed 
A) ​permeable 
B) selectively permeable 
C) non-permeable 
D) porous 
E) ​sealed

Question 14

The greater the lipid solubility of a substance,the slower the substance can diffuse through the membrane's lipid bilayer down its concentration gradient.

Accepted Answer

A) True 
 B)False

Question 15

The equilibrium potential for a given ion with differing concentrations across a membrane can be calculated by means of Fick's equation.

Accepted Answer

A) True 
 B)False

Question 16

What is the principal negative ion (anion)in the extracellular fluid (ECF)that is present in high concentrations?

Accepted Answer

A) ​sodium 
B) potassium 
C) glucose 
D) calcium 
E) ​chloride 
A) ​sodium 
B) potassium 
C) glucose 
D) calcium 
E) ​chloride

Question 17

What law governs how concentration gradients and other factors influence the rate of net diffusion?​

Accepted Answer

A) ​Fick's law of osmosis 
B) Fick's law of movement 
C) Fick's law of gradients 
D) Fick's law of diffusion 
E) ​Fick's law of concentrations 
A) ​Fick's law of osmosis 
B) Fick's law of movement 
C) Fick's law of gradients 
D) Fick's law of diffusion 
E) ​Fick's law of concentrations

Question 18

Carrier-mediated transport systems display three important characteristics that determine the kind and amount of material that's transferred across the membrane: ____________________,____________________ and ____________________.

Accepted Answer

specificity;saturation;competition
speci

Question 19

What two methods do cells use to accomplish selective transport processes across membranes?

Accepted Answer

A) ​carrier-mediated transport and vesicular transport 
B) protein-assisted osmosis and vesicular transport 
C) phagocytosis and carrier-mediated transport 
D) protein-assisted transport and electrical diffusion 
E) ​phagocytosis and electrical diffusion 
A) ​carrier-mediated transport and vesicular transport 
B) protein-assisted osmosis and vesicular transport 
C) phagocytosis and carrier-mediated transport 
D) protein-assisted transport and electrical diffusion 
E) ​phagocytosis and electrical diffusion

Question 20

If a substance can permeate the membrane,its rate of simple diffusion is inversely proportional to its concentration gradient.

Accepted Answer

A) True 
 B)False

Transcellular transport across the cell is regulated by and proteins.

Membrane channels can be open or closed,but carriers are always "open for business."

Figure 3-16 Answer the corresponding questions using the accompanying figure. -Which labeled diagram depicts the release of the phosphate group from the pump?

Most of the abundant matrix in connective tissue is secreted by fibroblasts.

A(n)____________________ exists when no net movement of any ions takes place because all passive leaks are exactly balanced by active pumping.

Two properties of particles influence whether they can permeate the plasma membrane without assistance: ____.

What are the most abundant plasma membrane lipids?

What kind of junctions are impermeable junctions that join the lateral edges of epithelial cells near their luminal borders,thus preventing movement of materials between the cells?

Phospholipids have a(n)____________________ head containing a negatively charged phosphate group and two electrically neutral fatty acid chain tails.

Describe the main functions of the plasma membrane.

What are active-transport mechanisms commonly called?

The two types of secondary active transport are and .

In terms of plasma membrane transport,which descriptor is the most accurate?

The greater the lipid solubility of a substance,the slower the substance can diffuse through the membrane's lipid bilayer down its concentration gradient.

The equilibrium potential for a given ion with differing concentrations across a membrane can be calculated by means of Fick's equation.

What is the principal negative ion (anion)in the extracellular fluid (ECF)that is present in high concentrations?

What law governs how concentration gradients and other factors influence the rate of net diffusion?

Carrier-mediated transport systems display three important characteristics that determine the kind and amount of material that's transferred across the membrane: , and .

What two methods do cells use to accomplish selective transport processes across membranes?

If a substance can permeate the membrane,its rate of simple diffusion is inversely proportional to its concentration gradient.

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 Systembrad

Filters

Exam 3: The Plasma Membrane and Membrane Potential

Transcellular transport across the cell is regulated by ____________________ and ____________________ proteins.

Membrane channels can be open or closed,but carriers are always "open for business."

Figure 3-16 Answer the corresponding questions using the accompanying figure. -Which labeled diagram depicts the release of the phosphate group from the pump?

Most of the abundant matrix in connective tissue is secreted by fibroblasts.

A(n)____________________ exists when no net movement of any ions takes place because all passive leaks are exactly balanced by active pumping.

Two properties of particles influence whether they can permeate the plasma membrane without assistance: ____.

What are the most abundant plasma membrane lipids?

What kind of junctions are impermeable junctions that join the lateral edges of epithelial cells near their luminal borders,thus preventing movement of materials between the cells?

Phospholipids have a(n)____________________ head containing a negatively charged phosphate group and two electrically neutral fatty acid chain tails.

Describe the main functions of the plasma membrane.

What are active-transport mechanisms commonly called?

The two types of secondary active transport are ____________________ and ____________________.

In terms of plasma membrane transport,which descriptor is the most accurate?

The greater the lipid solubility of a substance,the slower the substance can diffuse through the membrane's lipid bilayer down its concentration gradient.

The equilibrium potential for a given ion with differing concentrations across a membrane can be calculated by means of Fick's equation.

What is the principal negative ion (anion)in the extracellular fluid (ECF)that is present in high concentrations?

What law governs how concentration gradients and other factors influence the rate of net diffusion?​

Carrier-mediated transport systems display three important characteristics that determine the kind and amount of material that's transferred across the membrane: ____________________,____________________ and ____________________.

What two methods do cells use to accomplish selective transport processes across membranes?

If a substance can permeate the membrane,its rate of simple diffusion is inversely proportional to its concentration gradient.

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 Systembrad

Filters

Transcellular transport across the cell is regulated by and proteins.

The two types of secondary active transport are and .

What law governs how concentration gradients and other factors influence the rate of net diffusion?

Carrier-mediated transport systems display three important characteristics that determine the kind and amount of material that's transferred across the membrane: , and .