Question 1

Injecting fibroblasts with anti-Ras antibodies that inactivate Ras proteins increases cell division response to growth factors.
__________________

Accepted Answer

A) True 
 B)False

Question 2

Which of the following responses involves the activation of ion channels?

Accepted Answer

A)  Ras pathway activation of microfilament assembly in neutrophils 
B)  steroid hormone regulation of gene expression 
C)  Ras pathway activation of genes for cell division 
D)  peptide-stimulated assembly of microtubule assembly in neutrophils 
E)  serotonin-stimulated transmission of a neural impulse 
A)  Ras pathway activation of microfilament assembly in neutrophils 
B)  steroid hormone regulation of gene expression 
C)  Ras pathway activation of genes for cell division 
D)  peptide-stimulated assembly of microtubule assembly in neutrophils 
E)  serotonin-stimulated transmission of a neural impulse

Question 3

MATCHING
Match receptor with activated state.Answers should be used more than once.
a.Ion channel linked receptor
c.Enzyme linked receptor
b.G protein linked receptor
-Phosphate comes from ATP.

Accepted Answer

The answer of MATCHING
Match receptor with activated state.Answers should be...

Question 4

Hormones produced by endocrine glands are typically transported to target cells:

Accepted Answer

A)  across a synapse. 
B)  in the blood. 
C)  in interstitial fluid. 
D)  via direct contact. 
E)  through the air. 
A)  across a synapse. 
B)  in the blood. 
C)  in interstitial fluid. 
D)  via direct contact. 
E)  through the air.

Question 5

An example of a second messenger is:

Accepted Answer

A)  protein kinase A. 
B)  an ion channel. 
C)  cyclic AMP. 
D)  GABA. 
E)  insulin. 
A)  protein kinase A. 
B)  an ion channel. 
C)  cyclic AMP. 
D)  GABA. 
E)  insulin.

Question 6

Which of the following statements concerning Ras proteins is FALSE?

Accepted Answer

A)  They are inactivated when phosphorylated. 
B)  They are G proteins. 
C)  They are active when bound to GTP. 
D)  They are activated by tyrosine kinase receptors. 
E)  They include MAP kinases. 
A)  They are inactivated when phosphorylated. 
B)  They are G proteins. 
C)  They are active when bound to GTP. 
D)  They are activated by tyrosine kinase receptors. 
E)  They include MAP kinases.

Question 7

MATCHING
Match receptor with activated state.Answers should be used more than once.
a.Ion channel linked receptor
c.Enzyme linked receptor
b.G protein linked receptor
-DAG is the second messenger.

Accepted Answer

The answer of MATCHING
Match receptor with activated state.Answers should be...

Question 8

You conduct an experiment in which you inactivate Ras proteins in fibroblast cells.Which of the following is the most immediate consequence of this procedure?

Accepted Answer

A)  The fibroblasts synthesized excess G protein. 
B)  The fibroblasts synthesized excess DAG. 
C)  The fibroblasts no longer responded to calmodulin. 
D)  The fibroblases no longer synthesized DNA in response to growth factors. 
E)  The fibroblasts divided uncontrollably. 
A)  The fibroblasts synthesized excess G protein. 
B)  The fibroblasts synthesized excess DAG. 
C)  The fibroblasts no longer responded to calmodulin. 
D)  The fibroblases no longer synthesized DNA in response to growth factors. 
E)  The fibroblasts divided uncontrollably.

Question 9

The cholera toxin causes a(n) __________ of chloride channels in cells of the intestine and the resulting __________.

Accepted Answer

A)  closing; loss of blood 
B)  closing; movement of neutrophils toward the bacterium 
C)  opening; assembly of microtubules 
D)  opening; gain of water 
E)  opening; loss of water 
A)  closing; loss of blood 
B)  closing; movement of neutrophils toward the bacterium 
C)  opening; assembly of microtubules 
D)  opening; gain of water 
E)  opening; loss of water

Question 10

Paracrine signaling is different from other types of signaling in that the signaling molecule:

Accepted Answer

A)  is produced by endocrine glands. 
B)  binds to a receptor. 
C)  is secreted by neurons. 
D)  is transported in the blood. 
E)  acts on nearby cells. 
A)  is produced by endocrine glands. 
B)  binds to a receptor. 
C)  is secreted by neurons. 
D)  is transported in the blood. 
E)  acts on nearby cells.

Question 11

Compare and contrast the signal transduction pathway involving cAMP with that involving phospholipids.

Accepted Answer

Concepts to Consider: Role of

Question 12

When food is abundant , the cellular slime mold secretes cAMP into the environment to signal the formation of a multicellular slug-shaped colony.
__________________

Accepted Answer

A) True 
 B)False

Question 13

As a result of receptor up-regulation:

Accepted Answer

A)  the number of genes that code for a receptor increases. 
B)  the sensitivity of a cell to a hormone decreases. 
C)  the number of receptors decreases. 
D)  the concentration of hormone molecules in the blood increases. 
E)  a hormone's signal is amplified. 
A)  the number of genes that code for a receptor increases. 
B)  the sensitivity of a cell to a hormone decreases. 
C)  the number of receptors decreases. 
D)  the concentration of hormone molecules in the blood increases. 
E)  a hormone's signal is amplified.

Exam 6: Cell Communication

Injecting fibroblasts with anti-Ras antibodies that inactivate Ras proteins increases cell division response to growth factors. __________________

Which of the following responses involves the activation of ion channels?

MATCHING Match receptor with activated state.Answers should be used more than once. a.Ion channel linked receptor c.Enzyme linked receptor b.G protein linked receptor -Phosphate comes from ATP.

Hormones produced by endocrine glands are typically transported to target cells:

An example of a second messenger is:

Which of the following statements concerning Ras proteins is FALSE?

MATCHING Match receptor with activated state.Answers should be used more than once. a.Ion channel linked receptor c.Enzyme linked receptor b.G protein linked receptor -DAG is the second messenger.

You conduct an experiment in which you inactivate Ras proteins in fibroblast cells.Which of the following is the most immediate consequence of this procedure?

The cholera toxin causes a(n) __________ of chloride channels in cells of the intestine and the resulting __________.

Paracrine signaling is different from other types of signaling in that the signaling molecule:

Compare and contrast the signal transduction pathway involving cAMP with that involving phospholipids.

When food is abundant , the cellular slime mold secretes cAMP into the environment to signal the formation of a multicellular slug-shaped colony. __________________

As a result of receptor up-regulation:

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna: the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

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The cholera toxin causes a(n) of chloride channels in cells of the intestine and the resulting .