Question

the following is a model of a feedback loop that shows what happens when the levels of oxygen in the blood are too low, often due to a respiratory illness.

1. what is homeostasis?
2. define the following terms:

set point:
stimulus:
control center:
effector:
response:

1. using the homeostasis feedback loop model above identify the:

set point:________ a. breathing control center medulla (in brain)
stimulus:________ b. respiratory muscles of lungs
control center:________ c. increased breathing rate to return to normal oxygen levels
effector:________ d. decreased oxygen level in blood
response:________ e. normal oxygen level in blood

Explanation:

• Set Point: The normal or target value for a physiological variable. In this case, it's the normal oxygen level in the blood (e.g., \(e\)).
• Stimulus: A change that disrupts the set - point. Here, it's the decreased oxygen level in the blood (e.g., \(d\)).
• Control Center: The part of the body that receives information about the stimulus and determines the response. The breathing control center in the medulla (e.g., \(a\)) is the control center.
• Effector: The part of the body that carries out the response. The respiratory muscles of the lungs (e.g., \(b\)) are the effectors.
• Response: The action taken to counteract the stimulus. The increased breathing rate to return to normal oxygen levels (e.g., \(c\)) is the response.

Answer:

• Set Point: e. Normal Oxygen Level in Blood
• Stimulus: d. Decreased Oxygen Level in Blood
• Control center: a. Breathing Control Center Medulla (in brain)
• Effector: b. Respiratory Muscles of Lungs
• Response: c. Increased Breathing Rate to return to normal oxygen levels