Review Lesson 1 Bio 2 Quarter 3

Homeostasis and Feedback Mechanism

Feedback Mechanism

It is a process of nervous and hormonal regulation by which the body maintain levels

Feedback Mechanism

It is done to either increase or dampen the change in the system

Positive and Negative

What are the types of Feedback Mechanism?

Negative Feedback

It is the process when the receptor detect change and initiate response that will go against the change

Positive Feedback

It is the process by which stimulus causes a response which will increase the stimulation

Feedback Mechanism

help the body maintain homeostasis (balance).

Feedback Mechanism

They work like a control system, either increasing or decreasing a response based on a stimulus.

Negative Feedback

A response that counteracts (opposes) a change in the body to bring conditions back to normal.

Positive Feedback

A response that amplifies (increases) the change

Insulin and Glucagon

What are the hormones that regulate the blood sugar?

Oxytocin

This helps with childbirth contracts and milk ejection

Sweat gland activity

This is regulated by the hypothalamus which responds to temperature changes

Homeostasis

The state of balance

Stimulus

It is something in the environment that causes change

Receptor

It is a cells or tissues that receives stimulus

Relay

It is a transmitter of message via nerves of hormones or both to the effector

Negative

Is this a positive or negative feedback mechanism? Blood glucose rise after sugar meal

Negative

Is this a positive or negative feedback mechanism? Exercise create metabolic heat which raises the body temperature

Positive

Is this a positive or negative feedback mechanism? The contraction of uterine during childbirth

Positive

Is this a positive or negative feedback mechanism? A ripening apple releases the volatile plant hormone ethylene