Physiological Control Systems 1 - Homeostasis (Msq Drill 268)
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- 1.
What is the ability of an organism to maintain a stable internal environment in response to a changing environment called?
- A.
Steady state
- B.
Equilibrium
- C.
Homeostasis
- D.
Depolarized
Correct Answer
C. Homeostasis -
- 2.
When is an individual at equilibrium with their environment?
- A.
When their homeostatic mechanisms are in full swing.
- B.
At death.
- C.
During total inactivity
- D.
During a steady state
Correct Answer
B. At death. -
- 3.
Are equilibrium and steady state the same?
- A.
Yes, they are synonyms
- B.
No, they are not
Correct Answer
B. No, they are notExplanation
equilibrium only occurs at death, the human body maintains a steady state in order to achieve homeostasis.Rate this question:
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- 4.
Can equilibrium be unstable and stable?
- A.
Yes
- B.
No
Correct Answer
A. YesExplanation
Stable equilibria return to normal after a disturbance, whereas unstable equilibria will not return to normal after a disturbance.If you push a stable equilibria away it will come back to its original state.Rate this question:
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- 5.
How is the variable maintained within a fairly narrow range?
- A.
It has opposing forces continuosly acting on it.
- B.
It is not contained within a narrow range.
- C.
It self adapts
- D.
It is controlled by biochemical factors acting on it.
Correct Answer
A. It has opposing forces continuosly acting on it. -
- 6.
In a control system what compares the input from sensors with the setpoint?
- A.
Thermostat
- B.
Dependant variable
- C.
Intergrator
- D.
Equalizer
- E.
The hormone
Correct Answer
C. Intergrator -
- 7.
Do you require energy to maintain a state of equilibrium?
- A.
Yes
- B.
No
Correct Answer
B. No -
- 8.
In a control system what is the "error signal?"
- A.
It is the variable that initiates positive feedback.
- B.
There is no error signal in a control system.
- C.
It is the state of the body going into shock.
- D.
It is the amount of deviation from the setpoint.
Correct Answer
D. It is the amount of deviation from the setpoint. -
- 9.
What systems dominate homeostatic mechanisms? negative feedback or positive feedback?
- A.
Negative
- B.
Positive
Correct Answer
A. Negative -
- 10.
Negative feedback systems act to return the system to its basal condition through a series of reactions that reduce or eliminate the:-
- A.
Offensive signal
- B.
Error signal
- C.
Impending signal
- D.
Initiating signal
- E.
Feedback signal
Correct Answer
B. Error signal -
- 11.
Positive feedback systems increase or decrease the deviation from the basal condition?
- A.
Increase
- B.
Decrease
Correct Answer
A. Increase -
- 12.
What are the mechanisms that reduce the error signal called?
- A.
Reducing agents
- B.
Compensatory mechanisms
- C.
Stimulators
- D.
Homeostatic instruments
- E.
Endogenous pathways
Correct Answer
B. Compensatory mechanisms -
- 13.
Compensatory mechnisms are built into the body. The mechanisms must help and, so long as the problem is present, the compensatory mechanisms______________ .
- A.
Never go away
- B.
Must go away to give the body a chance to adapt.
- C.
Will only go away if the problem is fixed
Correct Answer
C. Will only go away if the problem is fixed -
- 14.
Positive feedback systems increase or decrease the deviation from the basal condition?
- A.
Increase
- B.
Decrease
Correct Answer
A. Increase -
- 15.
Do compensatory mechanisms which, are mostly produced by negative feedback fix the original problem?
- A.
Yes
- B.
No
Correct Answer
B. No -
- 16.
What controls how rapidly the system will return to steady state?
- A.
Modulation
- B.
Damping
- C.
Sequestration
- D.
Feedback regulation
Correct Answer
B. Damping -
- 17.
Damping depends on the speed of the
- A.
Sensor
- B.
Intergrator
- C.
Effector
Correct Answer
C. Effector -
- 18.
What is the term given to subsystems that regulate flow of information to amplify or reduce responses?
- A.
Negative feedback loops
- B.
Positive feedback loops
- C.
Feed backwards loops
- D.
Feed forward loops
- E.
Hmesotatic loops
Correct Answer
D. Feed forward loops -
- 19.
Damping also depends on the sensitivity of the
- A.
Sensor
- B.
Intergrator
- C.
Effector
Correct Answer
A. Sensor -
- 20.
Damping also relies on the response speed of: Check all that apply
- A.
Sensor
- B.
Effector
- C.
Intergrator
Correct Answer(s)
A. Sensor
B. Effector
C. Intergrator -
- 21.
Will a well damped system reduce or increase the number of oscillations?
- A.
Reduce
- B.
Increase
Correct Answer
A. Reduce -
- 22.
Will a high gain system bring the system back to the normal quicker or slower?
- A.
Quicker
- B.
Slower
Correct Answer
A. Quicker -
- 23.
What does the term "fully conmpensated" mean?
- A.
The system is now back to normal
- B.
The system has made its best compensatory response but the normal level has not been reached.
- C.
The system has refused to go back to normal.
- D.
The system is below the normal level.
Correct Answer
B. The system has made its best compensatory response but the normal level has not been reached.Explanation
In otherwords the system has done as best as it can to bring you back to normal.Rate this question:
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- 24.
An increase in the flow of urine is called
- A.
Diuresis
- B.
Kaliuresis
- C.
Hyperhidrosis
- D.
Hyperuremia
Correct Answer
A. Diuresis -
- 25.
An increase of pottasium in the urine is known as
- A.
Diuresis
- B.
Hyperkalemia
- C.
Hypernatremia
- D.
Kaliuresis
- E.
Potiuresis
Correct Answer
D. Kaliuresis -
- 26.
This drug is used to block sodium channels thereby increasing the amount of time sodium channels remain closed, in order to prevent depolarization conduction block.
- A.
Myoxetine
- B.
Mexiletene
- C.
Procainamide
- D.
Atenolol
- E.
Miletene
Correct Answer
B. Mexiletene -
- 27.
An inherited or acquired ion channel abnormality is known as a:
- A.
Channelopathy
- B.
Ion channel conduction block
- C.
Depolarization conduction block
- D.
Hyperpolarization conduction block
Correct Answer
A. Channelopathy -
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