Page 38 - Science Course 2 (Book 1)

Systems of The Human Body Mo2-L2a: Digestive System:
Absorption and Elimination
Lesson 2

Hypo- Homeostasis Hyper-

In this topic, you will learn the following
lessons:

Mo.2-L2a: Digestive System: Absorption and
Elimination
Mo.2-L2b: What Can Help Maintain Homeostasis? Let’s Begin

Mo2-L2a Digestive System: Homeostasis
Absorption and Elimination
Your body’s organ systems work together and
KEY CONCEPTS: maintain temperature, nutrient levels, oxygen,
1. How are nutrients processed in the body? fluid levels, pH, and many other conditions.
2. How does the body transport and process oxygen
and wastes? Homeostasis is the Body temperature
0
ability to maintain exceeds 37 C
constant internal
conditions when
Sensors like nerve cells with
Vocabulary A-Z outside conditions endings in the skin and brain
Let us learn some vocabulary change in order to
keep the body
functioning Temperature regulatory
properly.
homeostasis center in brain
an organism’s ability to maintain steady internal
conditions when outside conditions change. Sweat glands
throughout body

3 4
Input information sent along Control Center Output:
different pathway to Information sent along
different pathway to
Receptor Effector
2 (Sensor)
Change detected 5
by receptor Response of effector
feeds back to influence
1 magnitude of stimulus
Stimulus: and return variable to
Produce homeostasis
change in
variable

Variable
(in homeostasis)

Imbalance

Maintaining homeostasis ensures that cells and the
organism can function normally and remain healthy.

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