Question 1

Electrical quantities called ____________________ are gated in the plasma membrane for the development of membrane potentials.

Accepted Answer

The answer of Electrical quantities called ____________________ are gated in...

Question 2

The cellular component that, once activated by the binding of an extracellular messenger to a surface receptor, in turn activates cyclic AMP is _________________.

Accepted Answer

A) phospholipase C 
B) adenylate cyclase 
C)  calmodulin 
D)  calcium 
A) phospholipase C 
B) adenylate cyclase 
C)  calmodulin 
D)  calcium

Question 3

Net sodium movement into the cell occurs passively, whereas net sodium movement out of the cell occurs actively.

Accepted Answer

A) True 
 B)False

Question 4

When a neuron starts to depolarize, ____________________ ions move into the cell.

Accepted Answer

The answer of When a neuron starts to depolarize, ____________________...

Question 5

____________________ is a positive ion that tends to leak out of cells passively.

Accepted Answer

The answer of ____________________ is a positive ion that tends...

Question 6

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

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 7

A single neuron may be presynaptic to one group of neurons and postsynaptic to another group of neurons.

Accepted Answer

A) True 
 B)False

Question 8

Which of these statements correctly describes neuropeptides?

Accepted Answer

A) They are sometimes cosecreted along with classical neurotransmitters. 
B) They are synthesized in the cytosol of the axon terminal. 
C)  They act at the subsynaptic membrane of the postsynaptic neuron. 
D)  They usually alter the potential of postsynaptic cells by opening specific ion channels. 
A) They are sometimes cosecreted along with classical neurotransmitters. 
B) They are synthesized in the cytosol of the axon terminal. 
C)  They act at the subsynaptic membrane of the postsynaptic neuron. 
D)  They usually alter the potential of postsynaptic cells by opening specific ion channels.

Question 9

Facilitated diffusion is passive and does not require energy.

Accepted Answer

A) True 
 B)False

Question 10

Match the result, labelled a. or b., with the force and involved ion in question. (Options may be used more than once or not at all.)
a.The ion tends to be moved into the cell by this force.
b.The ion tends to be moved out of the cell by this force.
-Na+-K+ pump for Na+

Accepted Answer

Question 11

What happens to an action potential at an excitatory synapse?

Accepted Answer

A) The postsynaptic neuron depolarizes the presynaptic cell membrane. 
B) The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to both Na+ and K+. 
C)  The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to K+ only. 
D)  A small hyperpolarization occurs. 
A) The postsynaptic neuron depolarizes the presynaptic cell membrane. 
B) The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to both Na+ and K+. 
C)  The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to K+ only. 
D)  A small hyperpolarization occurs.

Question 12

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 whose equilibrium potential is exactly equal to the resting membrane potential

Accepted Answer

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

Question 13

Myelinated fibres conduct impulses about ____________________ times faster than unmyelinated fibres of the same diameter.

Accepted Answer

The answer of Myelinated fibres conduct impulses about ____________________ times...

Question 14

Which of the following is NOT a neuropeptide?

Accepted Answer

A) acetylcholine 
B) dopamine 
C)  epinephrine 
D)  glucagon 
A) acetylcholine 
B) dopamine 
C)  epinephrine 
D)  glucagon

Question 15

Which organelles contain oxidative enzymes?

Accepted Answer

A) peroxisomes and lysosomes 
B) mitochondria and nuclei 
C)  lysosomes and vaults 
D)  ribosomes and microtubules 
A) peroxisomes and lysosomes 
B) mitochondria and nuclei 
C)  lysosomes and vaults 
D)  ribosomes and microtubules

Question 16

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 whose concentration gradient is established by the membrane potential

Accepted Answer

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

Question 17

Along a neuron, an action potential normally travels from the dendrites to the cell body to the axon.

Accepted Answer

A) True 
 B)False

Question 18

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 is actively transported out of the cell

Accepted Answer

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

Question 19

A/an ____________________ solution has the same osmolarity as normal body cells.

Accepted Answer

The answer of A/an ____________________ solution has the same osmolarity...

Question 20

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. concentration gradient for K+ at the equilibrium potential for K+
B. electrical gradient for K+ at the equilibrium potential for K+

Accepted Answer

Electrical quantities called ____________________ are gated in the plasma membrane for the development of membrane potentials.

The cellular component that, once activated by the binding of an extracellular messenger to a surface receptor, in turn activates cyclic AMP is _________________.

Net sodium movement into the cell occurs passively, whereas net sodium movement out of the cell occurs actively.

When a neuron starts to depolarize, ____________________ ions move into the cell.

____________________ is a positive ion that tends to leak out of cells passively.

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

A single neuron may be presynaptic to one group of neurons and postsynaptic to another group of neurons.

Which of these statements correctly describes neuropeptides?

Facilitated diffusion is passive and does not require energy.

Match the result, labelled a. or b., with the force and involved ion in question. (Options may be used more than once or not at all.) a.The ion tends to be moved into the cell by this force. b.The ion tends to be moved out of the cell by this force. -Na⁺-K⁺ pump for Na⁺

What happens to an action potential at an excitatory synapse?

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 whose equilibrium potential is exactly equal to the resting membrane potential

Myelinated fibres conduct impulses about ____________________ times faster than unmyelinated fibres of the same diameter.

Which of the following is NOT a neuropeptide?

Which organelles contain oxidative enzymes?

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 whose concentration gradient is established by the membrane potential

Along a neuron, an action potential normally travels from the dendrites to the cell body to the axon.

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 is actively transported out of the cell

A/an ____________________ solution has the same osmolarity as normal body 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

Electrical quantities called ____________________ are gated in the plasma membrane for the development of membrane potentials.

The cellular component that, once activated by the binding of an extracellular messenger to a surface receptor, in turn activates cyclic AMP is _________________.

Net sodium movement into the cell occurs passively, whereas net sodium movement out of the cell occurs actively.

When a neuron starts to depolarize, ____________________ ions move into the cell.

____________________ is a positive ion that tends to leak out of cells passively.

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

A single neuron may be presynaptic to one group of neurons and postsynaptic to another group of neurons.

Which of these statements correctly describes neuropeptides?

Facilitated diffusion is passive and does not require energy.

Match the result, labelled a. or b., with the force and involved ion in question. (Options may be used more than once or not at all.) a.The ion tends to be moved into the cell by this force. b.The ion tends to be moved out of the cell by this force. -Na+-K+ pump for Na+

What happens to an action potential at an excitatory synapse?

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 whose equilibrium potential is exactly equal to the resting membrane potential

Myelinated fibres conduct impulses about ____________________ times faster than unmyelinated fibres of the same diameter.

Which of the following is NOT a neuropeptide?

Which organelles contain oxidative enzymes?

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 whose concentration gradient is established by the membrane potential

Along a neuron, an action potential normally travels from the dendrites to the cell body to the axon.

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 is actively transported out of the cell

A/an ____________________ solution has the same osmolarity as normal body 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

Match the result, labelled a. or b., with the force and involved ion in question. (Options may be used more than once or not at all.) a.The ion tends to be moved into the cell by this force. b.The ion tends to be moved out of the cell by this force. -Na⁺-K⁺ pump for Na⁺

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 whose equilibrium potential is exactly equal to 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 whose concentration gradient is established by the 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 is actively transported out of the cell