Physiological Control Systems 1 - Homeostasis (Msq Drill 268)

1. Are equilibrium and steady state the same?

Yes, they are synonyms

No, they are not

equilibrium only occurs at death, the human body maintains a steady state in order to achieve homeostasis.

Explanation

equilibrium only occurs at death, the human body maintains a steady state in order to achieve homeostasis.

2. What systems dominate homeostatic mechanisms? negative feedback or positive feedback?

Negative

Positive

3. Positive feedback systems increase or decrease the deviation from the basal condition?

Increase

Decrease

4. What is the ability of an organism to maintain a stable internal environment in response to a changing environment called?

Steady state

Equilibrium

Homeostasis

Depolarized

5. Positive feedback systems increase or decrease the deviation from the basal condition?

Increase

Decrease

6. Will a well damped system reduce or increase the number of oscillations?

Reduce

Increase

7. Will a high gain system bring the system back to the normal quicker or slower?

Quicker

Slower

8. An increase in the flow of urine is called

Diuresis

Kaliuresis

Hyperhidrosis

Hyperuremia

9. In a control system what is the "error signal?"

It is the variable that initiates positive feedback.

There is no error signal in a control system.

It is the state of the body going into shock.

It is the amount of deviation from the setpoint.

10. Can equilibrium be unstable and stable?

Yes

No

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.

Explanation

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.

11. Negative feedback systems act to return the system to its basal condition through a series of reactions that reduce or eliminate the:-

Offensive signal

Error signal

Impending signal

Initiating signal

Feedback signal

12. What are the mechanisms that reduce the error signal called?

Reducing agents

Compensatory mechanisms

Stimulators

Homeostatic instruments

Endogenous pathways

13. An inherited or acquired ion channel abnormality is known as a:

Channelopathy

Ion channel conduction block

Depolarization conduction block

Hyperpolarization conduction block

14. How is the variable maintained within a fairly narrow range?

It has opposing forces continuosly acting on it.

It is not contained within a narrow range.

It self adapts

It is controlled by biochemical factors acting on it.

15. Compensatory mechnisms are built into the body. The mechanisms must help and, so long as the problem is present, the compensatory mechanisms______________ .

Never go away

Must go away to give the body a chance to adapt.

Will only go away if the problem is fixed

16. What does the term "fully conmpensated" mean?

The system is now back to normal

The system has made its best compensatory response but the normal level has not been reached.

The system has refused to go back to normal.

The system is below the normal level.

In otherwords the system has done as best as it can to bring you back to normal.

Explanation

In otherwords the system has done as best as it can to bring you back to normal.

17. In a control system what compares the input from sensors with the setpoint?

Thermostat

Dependant variable

Intergrator

Equalizer

The hormone

18. When is an individual at equilibrium with their environment?

When their homeostatic mechanisms are in full swing.

At death.

During total inactivity

During a steady state

19. An increase of pottasium in the urine is known as

Diuresis

Hyperkalemia

Hypernatremia

Kaliuresis

Potiuresis

20. Damping also depends on the sensitivity of the

Sensor

Intergrator

Effector

21.
Do compensatory mechanisms which, are mostly produced by negative feedback fix the original problem?

Yes

No

22. Damping also relies on the response speed of: Check all that apply

Sensor

Effector

Intergrator

Submit

23. What controls how rapidly the system will return to steady state?

Modulation

Damping

Sequestration

Feedback regulation

24. Do you require energy to maintain a state of equilibrium?

Yes

No

25. 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.

Myoxetine

Mexiletene

Procainamide

Atenolol

Miletene