General Biology 2: Feedback Mechanisms

(12-02-2025)

Homeostasis

Is the process of maintaining balance in an organism’s internal environment to maintain life.

___________ is the ability of the body to maintain a stable internal environment despite outside changes.

Receptor, Control Center, and Effector

3 MAIN COMPONENTS of Homeostasis:

Receptor

It can detect changes in the body and send info to the control center

Control Center

It controls the signals to the effector

Effector

It responds to restore balance in the body

Feedback Mechanisms

These are self-regulating mechanisms that increase or decrease the level of a particular substance inside the body to maintain dynamic homeostasis.

Monitor changes and adjust

37 Degrees Celsius

Normal body temperature

Positive and negative feedback mechanism

Types of feedback mechanism

Negative Feedback Mechanism

- These are type of control that reduce the differences between the level of a variable and a set point level

- They regulate psychological processes and maintain optimal internal environments

Ex. Body Temperature

Positive Feedback Mechanism

- They are type of control that increases the differences between the variable and the set point level

- They amplify or increase the already existing responses and processes in biological organisms

Ex. Blood clothing, Child Birth

b. Negative feedback

When the body sweats to cool down, what mechanism is used?

b. Blood clotting

Which is an example of positive feedback?

b. Maintain balance in the body

What is the main purpose of feedback mechanisms?

True

True ot False; Positive feedback mechanisms usually stop after a specific outcome is reached.

True

True or False; Negative feedback mechanisms help maintain homeostasis.

True

True or False; Shivering warms the body when it becomes too cold.

False

True or False; Blood clotting is controlled by negative feedback.

False

True or False; Homeostasis only happens when the body is resting.