A) refers to a difference in electrical charge on opposite sides of a membrane B) is measured in millivolts, with the sign always designating the charge on the outside C) exists because the ECF as a whole is positively-charged and the cytosol as a whole is negatively charged D) is always positive during the resting state E) all of these A) refers to a difference in electrical charge on opposite sides of a membrane B) is measured in millivolts, with the sign always designating the charge on the outside C) exists because the ECF as a whole is positively-charged and the cytosol as a whole is negatively charged D) is always positive during the resting state E) all of these

A) appears under an electron microscope as a double dark line with a light space between B) is composed primarily of a double layer of protein molecules with cholesterol molecules interspersed between them C) has a hydrophilic region between two hydrophobic regions D) all of these E) none of these A) appears under an electron microscope as a double dark line with a light space between B) is composed primarily of a double layer of protein molecules with cholesterol molecules interspersed between them C) has a hydrophilic region between two hydrophobic regions D) all of these E) none of these

Exam 3: The Plasma Membrane and Membrane Potential

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Complete each of the following statments. The three characteristics that determine the kind and amount of material that can be moved across a membrane by carrier-mediated transport are , , and .

(Short Answer)

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Question 21

Use the figure above to answer the corresponding questions. Which protein might require ATP in order to transport a particle through the membrane? a. 1 b. 2 c. 3 d. 4 e. 5

(Short Answer)

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Question 22

In a plasma membrane, simple diffusion of various substances can occur

(Multiple Choice)

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Question 23

Most of a membrane potential is established by the passive movement of different cations into and out of a cell.

(True/False)

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Question 24

The resting membrane potential of a typical nerve cell is ____ mV.

(Multiple Choice)

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Question 25

Which statement about movement into the cytosol is false?

(Multiple Choice)

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Question 26

Complete each of the following statments. At the equilibrium potential for an ion, its gradient is exactly counterbalanced by its gradient.

(Short Answer)

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Question 27

A membrane potential

(Multiple Choice)

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Question 28

Describe the concentration gradients associated with the resting membrane potential.

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Question 29

Complete each of the following statments. The GLUT carrier moves glucose molecules their concentration gradient while moving ions down their concentration gradient.

(Short Answer)

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Question 30

Which statement is false?

(Multiple Choice)

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Question 31

Complete each of the following statments. ____________________ are cell connections that utilize CAMs to hold adjacent cells together while being anchor to intermediate filaments of each cell's cytoskeleton.

(Short Answer)

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Question 32

Complete each of the following statments. The pump moves two ions into the cell for every three ions it moves out the cell.

(Short Answer)

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Question 33

If a human cell is placed into solution X, containing water and a nonpenetrating solute, then

(Multiple Choice)

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Question 34

At equilibrium, when no net diffusion of Na⁺ or K⁺ is occurring through the membrane, Na+-K⁺ pumps do not have to pump Na⁺ or K⁺.

(True/False)

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Question 35

Which of the following can diffuse between a membrane's phospholipids into the cytosol?

(Multiple Choice)

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Question 36

The plasma membrane

(Multiple Choice)

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Question 37

The rate of diffusion for water-soluble substances through a membrane decreases as

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Question 38

Calcium and sodium ions are in a higher concentration in the ECF than in the cytosol, whereas potassium and chloride ions are in a higher concentration in the cytosol.

(True/False)

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Question 39

What is primarily responsible for the development of a resting membrane potential?

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Question 40

Showing 21 - 40 of 182

Exam 3: The Plasma Membrane and Membrane Potential

Complete each of the following statments. The three characteristics that determine the kind and amount of material that can be moved across a membrane by carrier-mediated transport are ____________________, ____________________, and ____________________.

Use the figure above to answer the corresponding questions. Which protein might require ATP in order to transport a particle through the membrane? a. 1 b. 2 c. 3 d. 4 e. 5

In a plasma membrane, simple diffusion of various substances can occur

Most of a membrane potential is established by the passive movement of different cations into and out of a cell.

The resting membrane potential of a typical nerve cell is ____ mV.

Which statement about movement into the cytosol is false?

Complete each of the following statments. At the equilibrium potential for an ion, its ____________________ gradient is exactly counterbalanced by its ____________________ gradient.

A membrane potential

Describe the concentration gradients associated with the resting membrane potential.

Complete each of the following statments. The GLUT carrier moves glucose molecules ____________________ their concentration gradient while moving ____________________ ions down their concentration gradient.

Which statement is false?

Complete each of the following statments. ____________________ are cell connections that utilize CAMs to hold adjacent cells together while being anchor to intermediate filaments of each cell's cytoskeleton.

Complete each of the following statments. The ____________________ pump moves two ____________________ ions into the cell for every three ____________________ ions it moves out the cell.

If a human cell is placed into solution X, containing water and a nonpenetrating solute, then

At equilibrium, when no net diffusion of Na+ or K+ is occurring through the membrane, Na+-K+ pumps do not have to pump Na+ or K+.

Which of the following can diffuse between a membrane's phospholipids into the cytosol?

The plasma membrane

The rate of diffusion for water-soluble substances through a membrane decreases as

Calcium and sodium ions are in a higher concentration in the ECF than in the cytosol, whereas potassium and chloride ions are in a higher concentration in the cytosol.

What is primarily responsible for the development of a resting membrane potential?

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 three characteristics that determine the kind and amount of material that can be moved across a membrane by carrier-mediated transport are , , and .

Complete each of the following statments. At the equilibrium potential for an ion, its gradient is exactly counterbalanced by its gradient.

Complete each of the following statments. The GLUT carrier moves glucose molecules their concentration gradient while moving ions down their concentration gradient.

Complete each of the following statments. The pump moves two ions into the cell for every three ions it moves out the cell.

At equilibrium, when no net diffusion of Na⁺ or K⁺ is occurring through the membrane, Na+-K⁺ pumps do not have to pump Na⁺ or K⁺.