Feedback Loops in Homeostasis

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Questions and Answers

What is homeostasis?

The ability of the body to maintain a stable internal environment despite changes in external conditions.

What does the receptor in the skin feedback loop consist of?

Skin and muscles

What is the role of the control centre in the skin feedback loop?

Brain

What is the effector in the skin feedback loop?

Erector muscle, sweat gland, capillaries Signup and view all the answers

What are the variables in the skin feedback loop?

Hot or cold Signup and view all the answers

What is the function of a receptor?

Detects change Signup and view all the answers

What does the control centre do?

Information from the receptor is sent here; this then sends information to the effector. Signup and view all the answers

What is the role of the effector?

Responds to control centre and reacts, sending the body back to homeostasis. Signup and view all the answers

What does the stimulus provide?

Change Signup and view all the answers

Which internal conditions are kept constant? (Select all that apply)

Glucose level Signup and view all the answers

What is the variable in the diabetes feedback loop for low blood sugar?

Skip a meal/Exercise Signup and view all the answers

What is the receptor in the diabetes feedback loop for low blood sugar?

Pancreas Signup and view all the answers

What does the control centre do in the diabetes feedback loop for low blood sugar?

Pancreas secretes glycagon hormone; this binds to the liver cells. Signup and view all the answers

What is the effector in the diabetes feedback loop for low blood sugar?

Liver converts glycagon to glucose, which is released into the blood. Signup and view all the answers

What is the receptor in the diabetes feedback loop for high blood sugar?

Pancreas Signup and view all the answers

What is the variable in the diabetes feedback loop for high blood sugar?

Eat a meal Signup and view all the answers

What does the control centre do in the diabetes feedback loop for high blood sugar?

Pancreas releases insulin; this acts to bind cells. Signup and view all the answers

What is the effector in the diabetes feedback loop for high blood sugar?

<ol> <li>Insulin binds to liver. 2. Liver uptakes sugar and converts it to glycogen. 3. Blood sugar returns to normal.</li> </ol> Signup and view all the answers

Study Notes

Homeostasis

Refers to the body's ability to maintain a stable internal environment.
Achieves stability in response to external changes.

Skin Feedback Loop

Receptor: Located in the skin and muscles, it detects changes in temperature.
Control Centre: The brain processes information received from the receptors.
Effector: Includes the erector muscle, sweat glands, and capillaries, which act to restore balance.
Variable: Represents the conditions that can change, such as hot or cold.

Components of Feedback Loops

Receptor: Responsible for detecting changes, such as temperature fluctuations.
Control Centre: Receives information from receptors and sends instructions to effectors.
Effector: Reacts to signals from the control centre to help return the body to homeostasis.
Stimulus: The initial change that prompts a response within the body.

Internal Conditions

Body maintains consistent levels of temperature, glucose, salt, and water.

Diabetes Feedback Loops

Low Blood Sugar Variable: Can be caused by skipping meals or excessive exercise.
- Receptor: The pancreas identifies low blood sugar levels.
- Control Centre: The pancreas secretes glucagon hormone, which acts on liver cells.
- Effector: The liver converts glucagon to glucose, releasing it into the bloodstream.
High Blood Sugar Variable: Typically results from consuming a meal.
- Receptor: Again, the pancreas detects elevated sugar levels.
- Control Centre: The pancreas releases insulin to manage blood sugar.
- Effector: Insulin facilitates sugar uptake by the liver, converting it into glycogen, thus normalizing blood sugar levels.

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Description

Explore the concepts of feedback loops involved in the body's ability to maintain homeostasis. This quiz includes key terms and definitions related to the skin feedback loop and its components such as receptors, control centers, and effectors. Test your knowledge on how these elements work together to regulate internal conditions.