Question 1

Gated channels for sodium ions may include

Accepted Answer

A)  mechanical gates, which respond to pressure. 
B)  chemical gates, which respond to ligands. 
C)  voltage gates, which respond to electrical signals. 
D)  All of the answers are correct. 
E)  None of the answers are correct. 
A)  mechanical gates, which respond to pressure. 
B)  chemical gates, which respond to ligands. 
C)  voltage gates, which respond to electrical signals. 
D)  All of the answers are correct. 
E)  None of the answers are correct.

Question 2

Bulk flow is fluid flow as a result of a(n)________ gradient.

Accepted Answer

A)  concentration 
B)  electrical 
C)  pressure 
D)  Two of the answers are correct. 
E)  None of the answers are correct. 
A)  concentration 
B)  electrical 
C)  pressure 
D)  Two of the answers are correct. 
E)  None of the answers are correct.

Question 3

Match the transport process to its description.
-the movement of molecules against the concentration gradient

Accepted Answer

A) active transport 
B) passive transport 
A) active transport 
B) passive transport

Question 4

Compare and contrast penetrating solutes and non-penetrating solutes.

Accepted Answer

This is discussed in

Question 5

The term cellular (metabolic)energy indicates any biological process requiring

Accepted Answer

A)  energy in any form. 
B)  ATP. 
C)  thermal energy. 
D)  chemical energy. 
E)  thermal energy and chemical energy. 
A)  energy in any form. 
B)  ATP. 
C)  thermal energy. 
D)  chemical energy. 
E)  thermal energy and chemical energy.

Question 6

If a 10% sucrose solution is separated from a 20% sucrose solution by a membrane impermeable to sucrose,in which direction will net movement of water occur?

Accepted Answer

A)  from the 10% sucrose solution to the 20% sucrose solution only 
B)  from the 20% sucrose solution to the 10% sucrose solution only 
C)  There will be no net movement of water in this case. 
D)  from the 10% sucrose solution to the 20% sucrose solution and from the 20% sucrose solution to the 10% sucrose solution 
E)  None of the answers are correct. 
A)  from the 10% sucrose solution to the 20% sucrose solution only 
B)  from the 20% sucrose solution to the 10% sucrose solution only 
C)  There will be no net movement of water in this case. 
D)  from the 10% sucrose solution to the 20% sucrose solution and from the 20% sucrose solution to the 10% sucrose solution 
E)  None of the answers are correct.

Question 7

Match the type of transport with its description.
-between adjacent cells

Accepted Answer

A) secretion 
B) paracellular transport 
C) transcellular transport 
D) absorption 
A) secretion 
B) paracellular transport 
C) transcellular transport 
D) absorption

Question 8

Water is a polar molecule,yet it easily moves through the nonpolar portions of cell membranes.Which transport process is responsible?

Accepted Answer

A)  facilitated diffusion 
B)  simple diffusion 
C)  uniport 
D)  symport 
E)  antiport 
A)  facilitated diffusion 
B)  simple diffusion 
C)  uniport 
D)  symport 
E)  antiport

Question 9

Distinguish between the following terms: cotransport; antiport; symport.

Accepted Answer

Cotransport is the moving of more than o

Question 10

Match the transport process to its description.
-the movement of molecules from an area of high concentration to an area of low concentration

Accepted Answer

A) simple diffusion 
B) facilitated diffusion 
C) both 
D) neither 
A) simple diffusion 
B) facilitated diffusion 
C) both 
D) neither

Question 11

Caveolae and clathrin-coated pits are both used in

Accepted Answer

A)  endocytosis. 
B)  exocytosis. 
C)  phagocytosis. 
D)  All of the answers are correct. 
E)  None of the answers are correct. 
A)  endocytosis. 
B)  exocytosis. 
C)  phagocytosis. 
D)  All of the answers are correct. 
E)  None of the answers are correct.

Question 12

A dehydrated patient needs a saline solution IV in order to be rehydrated.Unfortunately the hospital is poorly stocked with saline solutions.The nurse was asked by the doctor to mix up 1 L of a 0.45% saline solution using NaCl and distilled water.How would she do this? What is the osmolarity of this solution?

Accepted Answer

4.5 g NaCl into 950 mL of dist

Question 13

The ion that plays a key role in initiating electrical signals in neurons is

Accepted Answer

A)  K+. 
B)  Na+. 
C)  Cl-. 
D)  Ca2+. 
A)  K+. 
B)  Na+. 
C)  Cl-. 
D)  Ca2+.

Question 14

Permeability is a property of

Accepted Answer

A)  membranes. 
B)  ions. 
C)  solutes. 
D)  solvents. 
E)  proteins. 
A)  membranes. 
B)  ions. 
C)  solutes. 
D)  solvents. 
E)  proteins.

Question 15

What property of some cell membranes is associated with impermeability to water molecules?

Accepted Answer

Higher concentration

Question 16

The resting membrane potential in a typical nerve cell is approximately

Accepted Answer

A)  +70 mV. 
B)  -70 mV. 
C)  +35 mV. 
D)  -35 mV. 
E)  0 mV. 
A)  +70 mV. 
B)  -70 mV. 
C)  +35 mV. 
D)  -35 mV. 
E)  0 mV.

Question 17

Membrane protein pores that are essentially always open are called ________ or ________ channels.

Accepted Answer

open,leak

Question 18

Water will always move from ________ areas to ________ areas,if there are no impermeable barriers.

Accepted Answer

A)  hyperosmotic, hyposmotic 
B)  hyposmotic, hyperosmotic 
C)  isosmotic, hyposmotic 
D)  hyperosmotic, isosmotic 
A)  hyperosmotic, hyposmotic 
B)  hyposmotic, hyperosmotic 
C)  isosmotic, hyposmotic 
D)  hyperosmotic, isosmotic

Question 19

All of the following are types of mediated transport except one.Identify the exception.

Accepted Answer

A)  facilitated diffusion 
B)  primary active transport 
C)  simple diffusion 
D)  secondary active transport 
A)  facilitated diffusion 
B)  primary active transport 
C)  simple diffusion 
D)  secondary active transport

Question 20

Based on what you know about the characteristics of membrane transport,explain the results shown on the graph.Each mixture consists of equal parts of glucose and fructose at the indicated concentration.

Accepted Answer

The cell has two separate membrane trans

Exam 5: Membrane Dynamics

Gated channels for sodium ions may include

Bulk flow is fluid flow as a result of a(n)________ gradient.

Match the transport process to its description. -the movement of molecules against the concentration gradient

Compare and contrast penetrating solutes and non-penetrating solutes.

The term cellular (metabolic)energy indicates any biological process requiring

If a 10% sucrose solution is separated from a 20% sucrose solution by a membrane impermeable to sucrose,in which direction will net movement of water occur?

Match the type of transport with its description. -between adjacent cells

Water is a polar molecule,yet it easily moves through the nonpolar portions of cell membranes.Which transport process is responsible?

Distinguish between the following terms: cotransport; antiport; symport.

Match the transport process to its description. -the movement of molecules from an area of high concentration to an area of low concentration

Caveolae and clathrin-coated pits are both used in

The ion that plays a key role in initiating electrical signals in neurons is

Permeability is a property of

What property of some cell membranes is associated with impermeability to water molecules?

The resting membrane potential in a typical nerve cell is approximately

Membrane protein pores that are essentially always open are called ________ or ________ channels.

Water will always move from ________ areas to ________ areas,if there are no impermeable barriers.

All of the following are types of mediated transport except one.Identify the exception.

Based on what you know about the characteristics of membrane transport,explain the results shown on the graph.Each mixture consists of equal parts of glucose and fructose at the indicated concentration.

Introduction to Physiology

Molecular Interactions

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

Neurons: Cellular and Network Properties

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Cardiovascular Physiology

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

The Digestive System

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Integrative Physiology III: Exercise

Reproduction and Development

Filters

Membrane protein pores that are essentially always open are called or channels.

Water will always move from areas to areas,if there are no impermeable barriers.