Question

effectors
sensor
integrative center
set point
compares variable to
measures variable
adjust variable

Explanation:

To solve this problem, we analyze the components of a feedback loop (likely a homeostatic control system) and match them to the given boxes:

Step 1: Identify the "measures variable" box

In a homeostatic feedback loop, the Sensor (or receptor) is responsible for detecting/measuring the variable (e.g., temperature, blood glucose). So the box labeled "measures variable" is filled by "Sensor".

Step 2: Identify the "compares variable to" box

The Integrative center (e.g., brain, endocrine gland) receives input from the sensor, compares the measured variable to the Set point (the target value for the variable), and determines if adjustment is needed. Thus, the top box ("compares variable to") has "Integrative center" above the line and "Set point" below the line (since it compares the variable to the set point).

Step 3: Identify the "adjust variable" box

The Effectors (e.g., muscles, glands) receive signals from the integrative center and act to adjust the variable back toward the set point. So the box labeled "____ adjust variable" is filled by "Effectors".

Filled Diagram Summary:

• Bottom - left box ("measures variable"): $\boldsymbol{\text{Sensor}}$
• Top box ("compares variable to"): $\boldsymbol{\text{Integrative center}}$ (above the line) and $\boldsymbol{\text{Set point}}$ (below the line)
• Bottom - right box ("____ adjust variable"): $\boldsymbol{\text{Effectors}}$

If the question is to label each box:

• "measures variable": Sensor
• "compares variable to": Integrative center (top), Set point (bottom)
• "____ adjust variable": Effectors

Answer:

To solve this problem, we analyze the components of a feedback loop (likely a homeostatic control system) and match them to the given boxes:

Step 1: Identify the "measures variable" box

In a homeostatic feedback loop, the Sensor (or receptor) is responsible for detecting/measuring the variable (e.g., temperature, blood glucose). So the box labeled "measures variable" is filled by "Sensor".

Step 2: Identify the "compares variable to" box

The Integrative center (e.g., brain, endocrine gland) receives input from the sensor, compares the measured variable to the Set point (the target value for the variable), and determines if adjustment is needed. Thus, the top box ("compares variable to") has "Integrative center" above the line and "Set point" below the line (since it compares the variable to the set point).

Step 3: Identify the "adjust variable" box

The Effectors (e.g., muscles, glands) receive signals from the integrative center and act to adjust the variable back toward the set point. So the box labeled "____ adjust variable" is filled by "Effectors".

Filled Diagram Summary:

• Bottom - left box ("measures variable"): $\boldsymbol{\text{Sensor}}$
• Top box ("compares variable to"): $\boldsymbol{\text{Integrative center}}$ (above the line) and $\boldsymbol{\text{Set point}}$ (below the line)
• Bottom - right box ("____ adjust variable"): $\boldsymbol{\text{Effectors}}$

If the question is to label each box:

• "measures variable": Sensor
• "compares variable to": Integrative center (top), Set point (bottom)
• "____ adjust variable": Effectors