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Unit I - Cell Injury, Inflammation, and Repair Mechanisms

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Unit I - Cell Injury, Inflammation, and Repair Mechanisms

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Questions and Answers

What is the main characteristic of a positive feedback loop?

It is widely recognized as damaging
It results in stability within the system
It involves a decrease in the variable being monitored
It causes further amplification of the initial change (correct)

Which component picks up information from the surroundings in a feedback mechanism?

Receptor (correct)
Control center
Effector
Stimulus

What type of cell death is characterized by the breakdown of cell membranes?

Pyknosis
Autophagy
Necrosis (correct)
Apoptosis

In a negative feedback loop, what happens when there is a rise in concentration of a substance?

Feedback causes the substance's content to reduce (B) Signup and view all the answers

What is the role of the effector in a feedback mechanism?

Produces a response based on signals from the control center (D) Signup and view all the answers

What is the main purpose of a feedback mechanism in living systems?

To maintain steady internal conditions (C) Signup and view all the answers

Which type of feedback loop involves a change in the same direction as the initial change?

Positive feedback loop (A) Signup and view all the answers

What is an example of a negative feedback mechanism mentioned in the text?

Regulation of blood glucose levels (B) Signup and view all the answers

What role does the receptor play in a feedback system?

Transmitting physiological values to the control center (B) Signup and view all the answers

How does a positive feedback loop differ from a negative feedback loop?

Positive feedback leads to further changes in the same direction, while negative feedback inhibits changes. (C) Signup and view all the answers