Question 1

Oxygen enters the blood from the lungs by net diffusion.

Accepted Answer

A) True 
 B)False

Question 2

The synapse is a specialized part of a neuron.

Accepted Answer

A) True 
 B)False

Question 3

Communication between neurons occurs by the release of ____________________, which are chemical messengers.

Accepted Answer

The answer of Communication between neurons occurs by the release...

Question 4

In facilitated diffusion, particles move from a ____________________ concentration to a ____________________ concentration.

Accepted Answer

The answer of In facilitated diffusion, particles move from a...

Question 5

____________________ is a positive ion that tends to leak into cells.

Accepted Answer

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

Question 6

Which of the following correctly describes divergence?

Accepted Answer

A) Thousands of synapses from many presynaptic neurons end on a single postsynaptic cell. 
B) The dendrites diverge from the cell body to contact as many presynaptic neurons as possible. 
C)  The action potential initiated in the axon diminishes as it diverges into the axon terminals. 
D)  The axon of a nerve cell branches to synapse with many other cells, so that activity in one neuron influences the excitability of many other cells.
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) Thousands of synapses from many presynaptic neurons end on a single postsynaptic cell. 
B) The dendrites diverge from the cell body to contact as many presynaptic neurons as possible. 
C)  The action potential initiated in the axon diminishes as it diverges into the axon terminals. 
D)  The axon of a nerve cell branches to synapse with many other cells, so that activity in one neuron influences the excitability of many other cells.
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 7

Which of the following is correct for tight junctions?

Accepted Answer

A) They prevent passage of materials between epithelial cells. 
B) They force materials to pass between cells. 
C)  They are commonly found in respiratory tract linings. 
D)  They serve as avenues for the transfer of small molecules from one cell to the next. 
A) They prevent passage of materials between epithelial cells. 
B) They force materials to pass between cells. 
C)  They are commonly found in respiratory tract linings. 
D)  They serve as avenues for the transfer of small molecules from one cell to the next.

Question 8

The myelin covering the axon promotes the leakage of ions from the neuron.

Accepted Answer

A) True 
 B)False

Question 9

A change in a membrane potential from -70 mV to -60 mV is an example of which of the following?

Accepted Answer

A) depolarization 
B) hyperpolarization 
C)  polarization 
D)  repolarization 
A) depolarization 
B) hyperpolarization 
C)  polarization 
D)  repolarization

Question 10

For graded potentials, the magnitude of triggering is coded for in frequency rather than amplitude of depolarizations.

Accepted Answer

A) True 
 B)False

Question 11

All cell organelles are renewable.

Accepted Answer

A) True 
 B)False

Question 12

All molecules greater than 0.8 nm in diameter are unable to penetrate the plasma membrane unless there is a carrier for the molecule.

Accepted Answer

A) True 
 B)False

Question 13

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
-high yield of ATP

Accepted Answer

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

Question 14

Which of the following statements is correct for the Na+-K+ pump?

Accepted Answer

A) It pumps Na+ into the cell. 
B) It pumps K+ into the cell. 
C)  It pumps K+ out of the cell. 
D)  It has a higher affinity for K+ when the carrier is phosphorylated. 
A) It pumps Na+ into the cell. 
B) It pumps K+ into the cell. 
C)  It pumps K+ out of the cell. 
D)  It has a higher affinity for K+ when the carrier is phosphorylated.

Question 15

When a neuron fires a signal, a resting membrane potential is converted into a(n) ____________________ potential.

Accepted Answer

The answer of When a neuron fires a signal, a...

Question 16

Match the terms, labelled a. through f., to their correct descriptions. (Options may be used more than once or not at all.)
a.plasma membrane
b.nucleus
c.cytoplasm
d.cytosol
e.organelles
f.cytoskeleton
-consists of organelles and cytosol

Accepted Answer

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

Question 17

How is ATP synthesized via electron transport and oxidative phosphorylation?

Accepted Answer

The answer of How is ATP synthesized via electron transport...

Question 18

Where is the trigger zone of a neuron?

Accepted Answer

A) in the terminal ganglion 
B) in the hillock 
C)  in the chemically gated channels 
D)  in dendrites 
A) in the terminal ganglion 
B) in the hillock 
C)  in the chemically gated channels 
D)  in dendrites

Question 19

The ____________________ refers to the maximum amount of a substance that can be transported across the plasma membrane via a carrier in a given time.

Accepted Answer

The answer of The ____________________ refers to the maximum amount...

Question 20

Movement of potassium into cells always requires energy expenditure.

Accepted Answer

A) True 
 B)False

Oxygen enters the blood from the lungs by net diffusion.

The synapse is a specialized part of a neuron.

Communication between neurons occurs by the release of ____________________, which are chemical messengers.

In facilitated diffusion, particles move from a concentration to a concentration.

____________________ is a positive ion that tends to leak into cells.

Which of the following correctly describes divergence?

Which of the following is correct for tight junctions?

The myelin covering the axon promotes the leakage of ions from the neuron.

A change in a membrane potential from -70 mV to -60 mV is an example of which of the following?

For graded potentials, the magnitude of triggering is coded for in frequency rather than amplitude of depolarizations.

All cell organelles are renewable.

All molecules greater than 0.8 nm in diameter are unable to penetrate the plasma membrane unless there is a carrier for the molecule.

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 -high yield of ATP

Which of the following statements is correct for the Na⁺-K⁺ pump?

When a neuron fires a signal, a resting membrane potential is converted into a(n) ____________________ potential.

Match the terms, labelled a. through f., to their correct descriptions. (Options may be used more than once or not at all.) a.plasma membrane b.nucleus c.cytoplasm d.cytosol e.organelles f.cytoskeleton -consists of organelles and cytosol

How is ATP synthesized via electron transport and oxidative phosphorylation?

Where is the trigger zone of a neuron?

The ____________________ refers to the maximum amount of a substance that can be transported across the plasma membrane via a carrier in a given time.

Movement of potassium into cells always requires energy expenditure.

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

Oxygen enters the blood from the lungs by net diffusion.

The synapse is a specialized part of a neuron.

Communication between neurons occurs by the release of ____________________, which are chemical messengers.

In facilitated diffusion, particles move from a ____________________ concentration to a ____________________ concentration.

____________________ is a positive ion that tends to leak into cells.

Which of the following correctly describes divergence?

Which of the following is correct for tight junctions?

The myelin covering the axon promotes the leakage of ions from the neuron.

A change in a membrane potential from -70 mV to -60 mV is an example of which of the following?

For graded potentials, the magnitude of triggering is coded for in frequency rather than amplitude of depolarizations.

All cell organelles are renewable.

All molecules greater than 0.8 nm in diameter are unable to penetrate the plasma membrane unless there is a carrier for the molecule.

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 -high yield of ATP

Which of the following statements is correct for the Na+-K+ pump?

When a neuron fires a signal, a resting membrane potential is converted into a(n) ____________________ potential.

Match the terms, labelled a. through f., to their correct descriptions. (Options may be used more than once or not at all.) a.plasma membrane b.nucleus c.cytoplasm d.cytosol e.organelles f.cytoskeleton -consists of organelles and cytosol

How is ATP synthesized via electron transport and oxidative phosphorylation?

Where is the trigger zone of a neuron?

The ____________________ refers to the maximum amount of a substance that can be transported across the plasma membrane via a carrier in a given time.

Movement of potassium into cells always requires energy expenditure.

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

In facilitated diffusion, particles move from a concentration to a concentration.

Which of the following statements is correct for the Na⁺-K⁺ pump?