Download Notes 1 Introduction to Chapter 5

Notes 1
Introduction to
Chapter 5
Page 97
With your table:
1) Watch this video.
2) Answer these questions:
a) What is this organism?
b) What is the organism doing?
c) You know a little about the structure of cell
membranes. How is this possible?
Standards:
CLE 3210.1.5 - Compare different models to
explain the movement of materials into and
out of the cell.
SPI 3210.1.8 - Compare active and passive
transport.
RLE 2010.2.1 - Recognize the importance of
homeostasis as a survival mechanism.
Homeostasis
•
Define homeostasis:
a relatively stable state of equilibrium or a tendency
toward such a state
•
Macro example:
•
Micro example:
We maintain a stable body temperature.
Cells use the cell membrane to regulate what comes in
and out of the cell to keep steady levels of nutrients,
water and other substances.
Cell Membrane Transport
•
Two main types of cell transport:
o
Passive:
the movement of substances across a cell membrane
without the use of energy.
o
Active:
the movement of chemical substances, usually across
a cell membrane that requires the use of energy.
Cell Energy
1. Energy for the cell is
made in the: Mitochondria
2. Energy for the cell is made from:
Glucose (simple sugar)
3. The energy molecule used by the cell is:
ATP (adenosine triphosphate)
Review
Homeostasis:
a relatively stable state of equilibrium or a tendency
toward such a state
Two types of Cell Membrane Transport:
Passive - uses no energy; Active - uses energy
Energy molecule:
ATP - made from glucose in the mitochondria is used
during active transport.