WK 3: Systems Homeostasis

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What is the primary function of the detector in a homeostatic control system?

To correct deviations from the set point
To send error signals to the controller
To monitor the current state (correct)
To maintain a constant set point

What type of feedback is involved in homeostatic control processes?

Negative feedback (correct)
Positive feedback
Open-loop feedback
Neutral feedback

What is the role of the controller in a homeostatic control system?

To maintain a constant set point
To correct deviations from the set point (correct)
To send error signals to the detector
To detect deviations from the set point

Who coined the term 'homeostasis'?

Walter Bradford Cannon (D) Signup and view all the answers

What is the term for the process of maintaining a constant blood pressure?

Baroreflex (C) Signup and view all the answers

What is the main function of detectors in homeostasis?

To inform the system of the current state (D) Signup and view all the answers

What is the role of the effector in a homeostatic control system?

To correct deviations from the set point (C) Signup and view all the answers

What is the term for the increase in sympathetic sudomotor activity and decrease in cutaneous vasoconstrictor activity to lose heat?

Sweating (B) Signup and view all the answers

What is the term for maintaining a constant level or steady state?

Homeostasis (D) Signup and view all the answers

Which of the following is NOT a component of negative feedback control?

Sensor (B) Signup and view all the answers

What happens to the temperature set point in a case of pyrogenic fever?

It is reset to a higher value (A) Signup and view all the answers

What is the term for the internal environment?

Le mileu interieur (D) Signup and view all the answers

What is the term for the control of blood volume?

Volume regulation (B) Signup and view all the answers

What is the purpose of the controller in homeostasis?

To compare the current state with the set-point (D) Signup and view all the answers

What type of signals provide feedback in some homeostatic systems?

Both chemical and mechanical signals (B) Signup and view all the answers

What is the purpose of the baroreflex during exercise?

To maintain a constant blood pressure (B) Signup and view all the answers

What is the result of negative feedback in homeostasis?

A constant internal environment (D) Signup and view all the answers

What is the purpose of effectors in homeostasis?

To bring the current state to the set-point (C) Signup and view all the answers

Which of the following is an example of negative feedback in homeostasis?

All of the above (D) Signup and view all the answers

What is the significance of set-points in homeostasis?

They can be changed to accommodate different physiological requirements (D) Signup and view all the answers

What is the primary condition for free and independent life, according to Claude Bernard?

The constancy of the internal environment (C) Signup and view all the answers

What concept is illustrated by the centrifugal governor in James Watt's steam engine?

Negative feedback control (A) Signup and view all the answers

What is the role of the internal environment in maintaining life processes?

To protect the tissues from external influences (D) Signup and view all the answers

What is the outcome of a perfect balance between the organism and the external environment?

A delicate and continuous compensation (B) Signup and view all the answers

What is the purpose of a control system in a machine, such as James Watt's steam engine?

To maintain a constant output (A) Signup and view all the answers

What is the significance of the internal environment in maintaining life processes?

It provides a constant environment for the tissues (B) Signup and view all the answers

What is the relationship between the higher animal and the external world, according to Claude Bernard?

Close and wise (C) Signup and view all the answers

What is the primary goal of homeostasis in maintaining the internal environment?

To maintain a constant internal environment (B) Signup and view all the answers

What is the characteristic of an organism that is able to maintain a constant internal environment?

Perfection in the organism (A) Signup and view all the answers

What is the role of detectors and controllers in maintaining the internal environment?

To detect and correct deviations from the set point (A) Signup and view all the answers