Question 1

Which of these statements is correct for the rough endoplasmic reticulum?

Accepted Answer

A) It does not contain ribosomes. 
B) It synthesizes proteins for export from the cell or for use in construction of a new cellular membrane. 
C)  It is abundant in cells that specialize in lipid metabolism. 
D)  It is abundant in liver cells. 
A) It does not contain ribosomes. 
B) It synthesizes proteins for export from the cell or for use in construction of a new cellular membrane. 
C)  It is abundant in cells that specialize in lipid metabolism. 
D)  It is abundant in liver cells.

Question 2

What is the primary determinant of a membrane's selective permeability?

Accepted Answer

A) the structures of the membrane phospholipids 
B) the amount of cholesterol present 
C)  the number and types of membrane proteins 
D)  the charge of the membrane 
A) the structures of the membrane phospholipids 
B) the amount of cholesterol present 
C)  the number and types of membrane proteins 
D)  the charge of the membrane

Question 3

The dendrites of a presynaptic neuron directly signal the axon of a postsynaptic neuron.

Accepted Answer

A) True 
 B)False

Question 4

The following questions refer to comparative concentrations, permeabilities, and potentials under various circumstances. Match the relationship between the two items, a. and B.., with the qualifications labelled a. through c. (Options may be used more than once or not at all.)
a.A is greater than B
b.B is greater than A
c.A and B are equal
-A. permeability of a resting nerve cell membrane to K+
B. permeability of a resting nerve cell membrane to A-

Accepted Answer

Question 5

Which of the following occurs when an excitatory neurotransmitter binds to a nicotinic receptor?

Accepted Answer

A) Voltage-gated Na+ channels open. 
B) Voltage-gated K+ channels open. 
C)  Chemically gated Na+ channels open. 
D)  Voltage-gated Cl- channels open. 
A) Voltage-gated Na+ channels open. 
B) Voltage-gated K+ channels open. 
C)  Chemically gated Na+ channels open. 
D)  Voltage-gated Cl- channels open.

Question 6

The equilibrium potential for K+ is less than the resting membrane potential.

Accepted Answer

A) True 
 B)False

Question 7

Match the ions, labelled a. through d., with their various roles. (Options may be used more than once or not at all.)
a.NaS1U1P1+S1S1P0
b.KS1U1P1+S1S1P0
c.AS1U1P1-S1S1P0
d.ClS1U1P1-S1S1P0
-ion that has the predominant influence on the resting membrane potential

Accepted Answer

The answer of Match the ions, labelled a. through d.,...

Question 8

Which of the following statements correctly describes mitochondria?

Accepted Answer

A) They have an inner fluid-filled space called the crista. 
B) They possess their own DNA. 
C)  They are the site for cell reproduction. 
D)  They serve as workbenches for protein synthesis 
A) They have an inner fluid-filled space called the crista. 
B) They possess their own DNA. 
C)  They are the site for cell reproduction. 
D)  They serve as workbenches for protein synthesis

Question 9

At resting potential, the outside of the cell is negative compared to the intracellular fluid.

Accepted Answer

A) True 
 B)False

Question 10

If presynaptic neurons Y and Z are stimulated simultaneously, what change would you expect to occur in the postsynaptic neuron?

Accepted Answer

A) a single EPSP 
B) a single IPSP 
C)  temporal summation of EPSPs 
D)  spatial summation of EPSPs 
A) a single EPSP 
B) a single IPSP 
C)  temporal summation of EPSPs 
D)  spatial summation of EPSPs

Question 11

A high percentage of sodium and potassium ions move during each action potential.

Accepted Answer

A) True 
 B)False

Question 12

Action potentials are initiated at the axon hillock region because it has the lowest threshold voltage.

Accepted Answer

A) True 
 B)False

Question 13

Match the terms, labelled a. through c., to their descriptions. (Options may be used more than once or not at all.)
a.flagella
b.cilia
c.microvilli
-hair-like motile protrusions

Accepted Answer

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

Question 14

Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.)
a.microtubules
b.microfilaments
c.intermediate filaments
d.micro trabecular lattice
-visible only with a high-voltage electron microscope

Accepted Answer

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

Question 15

Which of these statements is correct for "neuromodulators"?

Accepted Answer

A) They bind to receptors at nonsynaptic sites. 
B) They do contribute directly to EPSP and IPSP formation. 
C)  They may influence neurotransmitter production. 
D)  They directly alter membrane permeability. 
A) They bind to receptors at nonsynaptic sites. 
B) They do contribute directly to EPSP and IPSP formation. 
C)  They may influence neurotransmitter production. 
D)  They directly alter membrane permeability.

Question 16

When EPSPs originating from a single presynaptic input occur so close together in time that they add together, or sum, thereby bringing the postsynaptic cell to threshold, it is called ____________________.

Accepted Answer

The answer of When EPSPs originating from a single presynaptic...

Question 17

Threshold potential is the peak potential achieved during an action potential.

Accepted Answer

A) True 
 B)False

Question 18

Lysosomes contain ____________________ enzymes that are capable of digesting and removing unwanted debris from the cell.

Accepted Answer

The answer of Lysosomes contain ____________________ enzymes that are capable...

Question 19

____________________ refers collectively to the large set of intracellular chemical reactions that involve the degradation, synthesis, and transformation of small organic molecules.

Accepted Answer

Intermedia

Question 20

Why does anaerobic respiration take place when O2 is unavailable?

Accepted Answer

A) to continue releasing at least some energy from molecules and generate ATP 
B) to prevent cell death 
C)  to make use of available glucose 
D)  to prevent protein breakdown
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) to continue releasing at least some energy from molecules and generate ATP 
B) to prevent cell death 
C)  to make use of available glucose 
D)  to prevent protein breakdown
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.

Which of these statements is correct for the rough endoplasmic reticulum?

What is the primary determinant of a membrane's selective permeability?

The dendrites of a presynaptic neuron directly signal the axon of a postsynaptic neuron.

Which of the following occurs when an excitatory neurotransmitter binds to a nicotinic receptor?

The equilibrium potential for K⁺ is less than the resting membrane potential.

Match the ions, labelled a. through d., with their various roles. (Options may be used more than once or not at all.) a.Na⁺ b.K⁺ c.A^- d.Cl^- -ion that has the predominant influence on the resting membrane potential

Which of the following statements correctly describes mitochondria?

At resting potential, the outside of the cell is negative compared to the intracellular fluid.

If presynaptic neurons Y and Z are stimulated simultaneously, what change would you expect to occur in the postsynaptic neuron?

A high percentage of sodium and potassium ions move during each action potential.

Action potentials are initiated at the axon hillock region because it has the lowest threshold voltage.

Match the terms, labelled a. through c., to their descriptions. (Options may be used more than once or not at all.) a.flagella b.cilia c.microvilli -hair-like motile protrusions

Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.) a.microtubules b.microfilaments c.intermediate filaments d.micro trabecular lattice -visible only with a high-voltage electron microscope

Which of these statements is correct for "neuromodulators"?

When EPSPs originating from a single presynaptic input occur so close together in time that they add together, or sum, thereby bringing the postsynaptic cell to threshold, it is called ____________________.

Threshold potential is the peak potential achieved during an action potential.

Lysosomes contain ____________________ enzymes that are capable of digesting and removing unwanted debris from the cell.

____________________ refers collectively to the large set of intracellular chemical reactions that involve the degradation, synthesis, and transformation of small organic molecules.

Why does anaerobic respiration take place when O₂ is unavailable?

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

Which of these statements is correct for the rough endoplasmic reticulum?

What is the primary determinant of a membrane's selective permeability?

The dendrites of a presynaptic neuron directly signal the axon of a postsynaptic neuron.

Which of the following occurs when an excitatory neurotransmitter binds to a nicotinic receptor?

The equilibrium potential for K+ is less than the resting membrane potential.

Match the ions, labelled a. through d., with their various roles. (Options may be used more than once or not at all.) a.Na+ b.K+ c.A- d.Cl- -ion that has the predominant influence on the resting membrane potential

Which of the following statements correctly describes mitochondria?

At resting potential, the outside of the cell is negative compared to the intracellular fluid.

If presynaptic neurons Y and Z are stimulated simultaneously, what change would you expect to occur in the postsynaptic neuron?

A high percentage of sodium and potassium ions move during each action potential.

Action potentials are initiated at the axon hillock region because it has the lowest threshold voltage.

Match the terms, labelled a. through c., to their descriptions. (Options may be used more than once or not at all.) a.flagella b.cilia c.microvilli -hair-like motile protrusions

Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.) a.microtubules b.microfilaments c.intermediate filaments d.micro trabecular lattice -visible only with a high-voltage electron microscope

Which of these statements is correct for "neuromodulators"?

When EPSPs originating from a single presynaptic input occur so close together in time that they add together, or sum, thereby bringing the postsynaptic cell to threshold, it is called ____________________.

Threshold potential is the peak potential achieved during an action potential.

Lysosomes contain ____________________ enzymes that are capable of digesting and removing unwanted debris from the cell.

____________________ refers collectively to the large set of intracellular chemical reactions that involve the degradation, synthesis, and transformation of small organic molecules.

Why does anaerobic respiration take place when O2 is unavailable?

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

The equilibrium potential for K⁺ is less than the resting membrane potential.

Match the ions, labelled a. through d., with their various roles. (Options may be used more than once or not at all.) a.Na⁺ b.K⁺ c.A^- d.Cl^- -ion that has the predominant influence on the resting membrane potential

Why does anaerobic respiration take place when O₂ is unavailable?