Question 1

Under which of these circumstances does an action potential develop?

Accepted Answer

A) when threshold voltage is reached 
B) when voltage-gated K+ channels open and the membrane reaches about -40 millivolts 
C)  when spatial and/or temporal summation of graded potentials are cancelled 
D)  when Cl- enters the cell 
A) when threshold voltage is reached 
B) when voltage-gated K+ channels open and the membrane reaches about -40 millivolts 
C)  when spatial and/or temporal summation of graded potentials are cancelled 
D)  when Cl- enters the cell D

Question 2

During the peak of the action potential, which of these ions has the greatest permeability?

Accepted Answer

A) sodium 
B) potassium 
C)  calcium 
D)  chloride 
A) sodium 
B) potassium 
C)  calcium 
D)  chloride B

Question 3

After an action potential has occurred, there is more Na+ inside the cell than outside the cell (before any Na+-K+ pump activity has taken place).

Accepted Answer

A) True 
 B)False  False

Question 4

Which of the following is the correct statement about membrane permeability and ion potential?

Accepted Answer

A) The concentration of potassium ions is the same extracellularly and intracellularly. 
B) The concentration of potassium is higher extracellularly than intracellularly. 
C)  The concentration of sodium is higher extracellularly than intracellularly. 
D)  The concentration of sodium is lower extracellularly than intracellularly. 
A) The concentration of potassium ions is the same extracellularly and intracellularly. 
B) The concentration of potassium is higher extracellularly than intracellularly. 
C)  The concentration of sodium is higher extracellularly than intracellularly. 
D)  The concentration of sodium is lower extracellularly than intracellularly.

Question 5

Match the cellular proteins, labelled a. through e., with their correct characteristic.
a.dynamin
b.tubulin
c.kinesin
d.actin
e.ribophorin
-serves as binding site for ribosomes

Accepted Answer

The answer of Match the cellular proteins, labelled a. through...

Question 6

The surface carbohydrates within the plasma membrane serve as cell adhesion molecules (CAMs), which cells use to grip one another and surrounding connective tissue fibres.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following is NOT an action of the cytosol?

Accepted Answer

A) duplication of chromosomes 
B) enzymatic regulation of intermediary metabolism 
C)  storage of fat and glycogen 
D)  synthesis of proteins for use in the cytosol 
A) duplication of chromosomes 
B) enzymatic regulation of intermediary metabolism 
C)  storage of fat and glycogen 
D)  synthesis of proteins for use in the cytosol

Question 8

If presynaptic neuron X is stimulated, the postsynaptic cell membrane becomes slightly hyperpolarized. What kind of a synapse is involved between presynaptic neuron X and the postsynaptic neuron?

Accepted Answer

A) excitatory synapse 
B) inhibitory synapse 
C)  either an excitatory or an inhibitory synapse 
D)  collateral axoaxonic 
A) excitatory synapse 
B) inhibitory synapse 
C)  either an excitatory or an inhibitory synapse 
D)  collateral axoaxonic

Question 9

Which one of the following is a function of membrane carbohydrates?

Accepted Answer

A) to serve as channels 
B) to determine the fluidity of the membrane 
C)  to assist in the aggregation of cells to form tissues 
D)  to serve as receptor sites 
A) to serve as channels 
B) to determine the fluidity of the membrane 
C)  to assist in the aggregation of cells to form tissues 
D)  to serve as receptor sites

Question 10

A balance of IPSPs and EPSPs will negate each other so that the grand postsynaptic potential is essentially unaltered.

Accepted Answer

A) True 
 B)False

Question 11

The stronger the stimulus, the greater the frequency of action potentials generated in a neuron.

Accepted Answer

A) True 
 B)False

Question 12

Endocytosis can be accomplished by phagocytosis and pinocytosis.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following occurs with presynaptic inhibition in a specific neuron?

Accepted Answer

A) An IPSP occurs on the postsynaptic cells. 
B) All excitatory information being fed into the cell is depressed. 
C)  The release of excitatory transmitter from a specific presynaptic excitatory input is depressed. 
D)  An EPSP occurs in the postsynaptic cells. 
A) An IPSP occurs on the postsynaptic cells. 
B) All excitatory information being fed into the cell is depressed. 
C)  The release of excitatory transmitter from a specific presynaptic excitatory input is depressed. 
D)  An EPSP occurs in the postsynaptic cells.

Question 14

In which cells are actin and myosin filaments found commonly?

Accepted Answer

A) epithelial cells 
B) muscle cells 
C)  nerve cells 
D)  red blood cells 
A) epithelial cells 
B) muscle cells 
C)  nerve cells 
D)  red blood cells

Question 15

By osmosis, a water molecule always moves to an area of higher ________________.

Accepted Answer

A) electrical intensity 
B) fluid pressure 
C)  mitochondrial activity 
D)  solute concentration 
A) electrical intensity 
B) fluid pressure 
C)  mitochondrial activity 
D)  solute concentration

Question 16

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 17

Match the terms, labelled a. through c., with their characteristics, labelled 1. (Options may be used more than once or not at all.)
a.glycolysis
b.citric acid cycle
c.oxidative phosphorylation
-takes place in the cytosol

Accepted Answer

The answer of Match the terms, labelled a. through c.,...

Question 18

Which statement regarding graded potentials is NOT correct?

Accepted Answer

A) They are decremental. 
B) They travel only short distances. 
C)  They are self-propagating. 
D)  They may contribute to the development of an action potential. 
A) They are decremental. 
B) They travel only short distances. 
C)  They are self-propagating. 
D)  They may contribute to the development of an action potential.

Question 19

Which of the following statements is correct for an anaerobic condition?

Accepted Answer

A) Oxygen is plenty. 
B) The degradation of glucose cannot proceed beyond glycolysis. 
C)  Mitochondrial processing of nutrient molecules takes place. 
D)  It produces a high yield of oxygen molecules.
For the following questions, assume a hypothetical postsynaptic neuron has three presynaptic inputs: X, Y, and Z. Also assume that presynaptic neurons Y and Z are excitatory. 
A) Oxygen is plenty. 
B) The degradation of glucose cannot proceed beyond glycolysis. 
C)  Mitochondrial processing of nutrient molecules takes place. 
D)  It produces a high yield of oxygen molecules.
For the following questions, assume a hypothetical postsynaptic neuron has three presynaptic inputs: X, Y, and Z. Also assume that presynaptic neurons Y and Z are excitatory.

Question 20

The sodium-potassium pump indirectly offers the energy source for glucose transport across intestinal cells.

Accepted Answer

A) True 
 B)False

Under which of these circumstances does an action potential develop?

During the peak of the action potential, which of these ions has the greatest permeability?

After an action potential has occurred, there is more Na⁺ inside the cell than outside the cell (before any Na⁺-K⁺ pump activity has taken place).

Which of the following is the correct statement about membrane permeability and ion potential?

Match the cellular proteins, labelled a. through e., with their correct characteristic. a.dynamin b.tubulin c.kinesin d.actin e.ribophorin -serves as binding site for ribosomes

The surface carbohydrates within the plasma membrane serve as cell adhesion molecules (CAMs), which cells use to grip one another and surrounding connective tissue fibres.

Which of the following is NOT an action of the cytosol?

If presynaptic neuron X is stimulated, the postsynaptic cell membrane becomes slightly hyperpolarized. What kind of a synapse is involved between presynaptic neuron X and the postsynaptic neuron?

Which one of the following is a function of membrane carbohydrates?

A balance of IPSPs and EPSPs will negate each other so that the grand postsynaptic potential is essentially unaltered.

The stronger the stimulus, the greater the frequency of action potentials generated in a neuron.

Endocytosis can be accomplished by phagocytosis and pinocytosis.

Which of the following occurs with presynaptic inhibition in a specific neuron?

In which cells are actin and myosin filaments found commonly?

By osmosis, a water molecule always moves to an area of higher ________________.

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

Match the terms, labelled a. through c., with their characteristics, labelled 1. (Options may be used more than once or not at all.) a.glycolysis b.citric acid cycle c.oxidative phosphorylation -takes place in the cytosol

Which statement regarding graded potentials is NOT correct?

Which of the following statements is correct for an anaerobic condition?

The sodium-potassium pump indirectly offers the energy source for glucose transport across intestinal cells.

Introduction to Physiology and Homeostasis

The Plasma Membrane and Membrane Potential

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 Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

Filters

Exam 2: Cell Physiology

Under which of these circumstances does an action potential develop?

During the peak of the action potential, which of these ions has the greatest permeability?

After an action potential has occurred, there is more Na+ inside the cell than outside the cell (before any Na+-K+ pump activity has taken place).

Which of the following is the correct statement about membrane permeability and ion potential?

Match the cellular proteins, labelled a. through e., with their correct characteristic. a.dynamin b.tubulin c.kinesin d.actin e.ribophorin -serves as binding site for ribosomes

The surface carbohydrates within the plasma membrane serve as cell adhesion molecules (CAMs), which cells use to grip one another and surrounding connective tissue fibres.

Which of the following is NOT an action of the cytosol?

If presynaptic neuron X is stimulated, the postsynaptic cell membrane becomes slightly hyperpolarized. What kind of a synapse is involved between presynaptic neuron X and the postsynaptic neuron?

Which one of the following is a function of membrane carbohydrates?

A balance of IPSPs and EPSPs will negate each other so that the grand postsynaptic potential is essentially unaltered.

The stronger the stimulus, the greater the frequency of action potentials generated in a neuron.

Endocytosis can be accomplished by phagocytosis and pinocytosis.

Which of the following occurs with presynaptic inhibition in a specific neuron?

In which cells are actin and myosin filaments found commonly?

By osmosis, a water molecule always moves to an area of higher ________________.

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

Match the terms, labelled a. through c., with their characteristics, labelled 1. (Options may be used more than once or not at all.) a.glycolysis b.citric acid cycle c.oxidative phosphorylation -takes place in the cytosol

Which statement regarding graded potentials is NOT correct?

Which of the following statements is correct for an anaerobic condition?

The sodium-potassium pump indirectly offers the energy source for glucose transport across intestinal cells.

Introduction to Physiology and Homeostasis

The Plasma Membrane and Membrane Potential

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 Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

Filters

After an action potential has occurred, there is more Na⁺ inside the cell than outside the cell (before any Na⁺-K⁺ pump activity has taken place).