Question 1

Negative-feedback mechanisms:

Minimize changes in blood glucose levels. 
Maintain homeostasis. 
Are responsible for an increased rate of sweating when air temperature is higher than body temperature. 
All of the above are correct.

Accepted Answer

All of the above are correct.

Question 2

Shivering to try to raise your body temperature back to normal would be an example of:

The body trying to maintain homeostasis. 
A positive-feedback mechanism. 
A negative-feedback mechanism. 
Both A and C.

Accepted Answer

Both A and C.

Question 3

The normal reading or range of normal is called the:
 
Sensor point. 
Set point.
Effector point. 
Integrator point.

Accepted Answer

Set point.

Question 4

Of the 11 major body systems, which is the least involved in maintaining homeostasis?

Circulatory 
Endocrine 
Lymphatic
Reproductive

Accepted Answer

Reproductive

Question 5

Negative-feedback control systems:

Oppose a change. 
Accelerate a change. 
Have no effect on the deviation from set point. 
Establish a new set point.

Accepted Answer

Oppose a change.

Question 6

Which of the following is a protein substance with no DNA or RNA and is thought to be the cause of mad cow disease?

Virus 
Bacteria 
Prion 
Protozoan

Accepted Answer

Prion

Question 7

The body’s thermostat is located in the:

Heart. 
Cerebellum. 
Pituitary. 
Hypothalamus.

Accepted Answer

Hypothalamus.

Question 8

Of the pathogenic organisms, which of the following are the most complex?

Viruses
Tapeworms 
Bacteria 
Protozoa

Accepted Answer

Tapeworms

Question 9

Of the 11 major body systems, which is the least involved in maintaining homeostasis?

Circulatory 
Endocrine 
Lymphatic 
Reproductive

Accepted Answer

Reproductive

Question 10

The term that literally means self-immunity is:

Autoimmunity. 
Homoimmunity. 
Passive immunity. 
Active immunity.

Accepted Answer

Autoimmunity.

Question 11

Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called:

Viruses. 
Bacteria. 
Fungi. 
Protozoa.

Accepted Answer

Viruses.

Question 12

Intrinsic control:

Usually involves the endocrine or nervous system. 
Operates at the cellular level. 
Is sometimes called autoregulation.
Operates at the system or organism level.

Accepted Answer

Is sometimes called autoregulation.

Question 13

Which of the following is not one of the basic components in a feedback control loop?

Effector mechanism 
Transmitter 
Sensor 
Integrating center

Accepted Answer

Transmitter

Question 14

If the secretion of oxytocin during childbirth operated as a negative-feedback control loop, what effect would it have on uterine contractions?

Oxytocin would stimulate stronger uterine contractions. 
Oxytocin would inhibit uterine contractions. 
The

Accepted Answer

Oxytocin would inhibit uterine contractions.

Question 15

Pathogenesis can be defined as:

A specific disease. 
A group of diseases. 
The course of disease development. 
A subgroup of viruses.

Accepted Answer

The course of disease development.

Question 16

Homeostasis can best be described as:

A constant state maintained by living and nonliving organisms. 
A state of relative constancy. 
Adaptation to the external environment. 
Changes in body temperature.

Accepted Answer

A state of relative constancy.

Question 17

Which of the following may put one at risk for developing a given disease?

Environment 
Stress 
Lifestyle 
All of the above

Accepted Answer

All of the above

Question 18

The contraction of the uterus during the birth of a baby is an example of _____ feedback.

Negative 
Positive 
Inhibitory 
Deviating

Accepted Answer

Positive

Question 19

Positive-feedback control systems:

Have no effect on the deviation from set point. 
Accelerate a change. 
Ignore a change. 
Do not exist in human systems.

Accepted Answer

Accelerate a change.

Question 20

Epidemiology is the study of the _____ of diseases in human populations.

Occurrence 
Distribution 
Transmission 
All of the above are correct.

Accepted Answer

All of the above are correct.

SCI221-05

Week 1

Question	Answer
Negative-feedback mechanisms: Minimize changes in blood glucose levels. Maintain homeostasis. Are responsible for an increased rate of sweating when air temperature is higher than body temperature. All of the above are correct.	All of the above are correct.
Shivering to try to raise your body temperature back to normal would be an example of: The body trying to maintain homeostasis. A positive-feedback mechanism. A negative-feedback mechanism. Both A and C.	Both A and C.
The normal reading or range of normal is called the: Sensor point. Set point. Effector point. Integrator point.	Set point.
Of the 11 major body systems, which is the least involved in maintaining homeostasis? Circulatory Endocrine Lymphatic Reproductive	Reproductive
Negative-feedback control systems: Oppose a change. Accelerate a change. Have no effect on the deviation from set point. Establish a new set point.	Oppose a change.
Which of the following is a protein substance with no DNA or RNA and is thought to be the cause of mad cow disease? Virus Bacteria Prion Protozoan	Prion
The body’s thermostat is located in the: Heart. Cerebellum. Pituitary. Hypothalamus.	Hypothalamus.
Of the pathogenic organisms, which of the following are the most complex? Viruses Tapeworms Bacteria Protozoa	Tapeworms
Of the 11 major body systems, which is the least involved in maintaining homeostasis? Circulatory Endocrine Lymphatic Reproductive	Reproductive
The term that literally means self-immunity is: Autoimmunity. Homoimmunity. Passive immunity. Active immunity.	Autoimmunity.
Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called: Viruses. Bacteria. Fungi. Protozoa.	Viruses.
Intrinsic control: Usually involves the endocrine or nervous system. Operates at the cellular level. Is sometimes called autoregulation. Operates at the system or organism level.	Is sometimes called autoregulation.
Which of the following is not one of the basic components in a feedback control loop? Effector mechanism Transmitter Sensor Integrating center	Transmitter
If the secretion of oxytocin during childbirth operated as a negative-feedback control loop, what effect would it have on uterine contractions? Oxytocin would stimulate stronger uterine contractions. Oxytocin would inhibit uterine contractions. The	Oxytocin would inhibit uterine contractions.
Pathogenesis can be defined as: A specific disease. A group of diseases. The course of disease development. A subgroup of viruses.	The course of disease development.
Homeostasis can best be described as: A constant state maintained by living and nonliving organisms. A state of relative constancy. Adaptation to the external environment. Changes in body temperature.	A state of relative constancy.
Which of the following may put one at risk for developing a given disease? Environment Stress Lifestyle All of the above	All of the above
The contraction of the uterus during the birth of a baby is an example of _____ feedback. Negative Positive Inhibitory Deviating	Positive
Positive-feedback control systems: Have no effect on the deviation from set point. Accelerate a change. Ignore a change. Do not exist in human systems.	Accelerate a change.
Epidemiology is the study of the _____ of diseases in human populations. Occurrence Distribution Transmission All of the above are correct.	All of the above are correct.

"Know" box contains:
Time elapsed:
Retries: