Question 1

Match the term with its description:
-the organ or gland that performs the change

Accepted Answer

A) threshold 
B) effector 
C) integrating center 
D) setpoint 
E) sensory receptor

Question 2

________ is a process by which an extracellular signal molecule,called the ________,activates a membrane receptor that in turn alters intracellular molecules,called the ________,to create a response.

Accepted Answer

The answer of ________ is a process by which an...

Question 3

Homeostatic regulation usually involves a(n)________ that is sensitive to a particular stimulus (variable)and a(n)________ whose activity has an effect on the same stimulus.

Accepted Answer

The answer of Homeostatic regulation usually involves a(n)________ that is...

Question 4

Signal molecule receptors exhibit

Accepted Answer

A)  specificity only. 
B)  competition only. 
C)  saturation only. 
D)  competition and saturation only. 
E)  specificity, competition, and saturation.

Question 5

When epinephrine combines with alpha adrenergic receptors on smooth muscle in intestinal blood vessels,the blood vessels ________; however,when epinephrine binds to beta-2 adrenergic receptors on certain skeletal muscle blood vessels,the vessels ________.

Accepted Answer

The answer of When epinephrine combines with alpha adrenergic receptors...

Question 6

Receptor molecules on the surface of a cell

Accepted Answer

A)  determine that cell's response. 
B)  may allow a particular ligand to bind. 
C)  bind to all ligands. 
D)  determine that cell's response and may allow a particular ligand to bind. 
E)  determine that cell's response and bind to all ligands.

Question 7

To maintain ________,the body uses a combination of simple diffusion across small distances; wide spread distribution of molecules through the circulatory system and rapid,specific delivery of messages by the nervous system.

Accepted Answer

The answer of To maintain ________,the body uses a combination...

Question 8

Design a flow chart or concept map to summarize the information in the text under the heading "Cell-to-Cell Communication." This chart should make clear the four basic methods of cell-to-cell communication,and the relevance of and distinction between paracrine,autocrine,neurocrine,and cytokine chemicals.

Accepted Answer

The answer of Design a flow chart or concept map...

Question 9

An intracellular signal molecule that translates a signal from a neurotransmitter or hormone into an intracellular response is called a ________.

Accepted Answer

The answer of An intracellular signal molecule that translates a...

Question 10

The most significant difference between a paracrine and an autocrine is

Accepted Answer

A)  the cell that releases it. 
B)  the cell that responds to it. 
C)  the method of transport. 
D)  the route of transport. 
E)  There are no differences-they are the same.

Question 11

You are part of a research team designing a robot for competition.Your robot needs to be able to respond to painful stimuli like stepping on broken glass.What type of human control system will you model your robot's after and explain your reasons for choosing it.

Accepted Answer

The answer of You are part of a research team...

Question 12

Define tonic control and give a physiological example.

Accepted Answer

The answer of Define tonic control and give a physiological...

Question 13

Which is NOT a basic method of cell-to-cell communication?

Accepted Answer

A)  cytoplasmic transfer of signals 
B)  contact-dependent signals 
C)  diffused chemical signals 
D)  nerve and blood-transported signals 
E)  mechanical signals

Question 14

Match the term with its description:
-continuously monitors its environment for a specific variable

Accepted Answer

A) threshold 
B) effector 
C) integrating center 
D) setpoint 
E) sensory receptor

Question 15

The binding of lipophilic messengers,such as steroid hormones,to their receptors triggers

Accepted Answer

A)  adenylyl cyclase activation. 
B)  cyclic nucleotide formation. 
C)  G protein inhibition. 
D)  gene transcription. 
E)  protein kinase activation.

Question 16

Before nitric oxide was identified,its action was observed in ________ and it was given the name ________.

Accepted Answer

The answer of Before nitric oxide was identified,its action was...

Question 17

Lipid signal molecules that act in a paracrine fashion and combine with G-protein coupled receptors include ________ and ________.

Accepted Answer

The answer of Lipid signal molecules that act in a...

Question 18

________ are molecules that bind to the receptor in such a way that they block the normal ligand from binding and turning the receptor on.As a result,the signal pathway remains inactive.

Accepted Answer

The answer of ________ are molecules that bind to the...

Question 19

Explain the two forms of down-regulation.

Accepted Answer

The answer of Explain the two forms of down-regulation....

Exam 6: Communication, Integration, and Homeostasis

Match the term with its description: -the organ or gland that performs the change

is a process by which an extracellular signal molecule,called the ,activates a membrane receptor that in turn alters intracellular molecules,called the ,to create a response.

Homeostatic regulation usually involves a(n) that is sensitive to a particular stimulus (variable)and a(n) whose activity has an effect on the same stimulus.