1. Entry slip: What is a corrective action?
Lesson 5.3 Homeostasis
I. Terms:
a.Homeostasis (p772):
i. The body’s maintenance of a
relatively constant internal
environment (i.e. water content, O2
level, temperature, etc..)
II. Homeostatic Mechanisms:
a. There are limited conditions under which
the body will work. Example: if there is
not enough O2, the body’s cells will die.
Likewise, there are many functions that
the body performs to maintain the
desired internal environment:
i. Control of Breathing
ii. Control of Heart Rate

2. iii. Transportation of nutrients, wastes,
gases, water, temperature, defence
mechanisms
iv. Excretion of harmful wastes
v. Maintain proper water and mineral
balance
vi. Has immunity mechanisms
vii. Various functions performed by liver
viii. Various functions of lymphatic system
III.Youtube search:
a.none
IV. Classwork-Poster Information:
a. The class will be divided up and each
group will be assigned a homeostasis
topic. Each group must:
i. Describe what internal condition the
body needs.
ii. Describe what functions help the
body maintain homeostasis

3. b.This will be a two-day assignment with
work on the posters today as well as the
first half of tomorrow, with presentations
tomorrow.
V. Homework:
a. None.