Download Cell Structure and Function

Cell Structure and
Function
Biology 11
Given:
Warm up!
Low power f.o.v. = 4.4mm
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A student observed a cell that covered 50% of the high
power field of view. Calculate Actual Size.
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If the same student drew a diagram of the cell that
measured 10.0cm calculate the Scale of the diagram.
Question: How does the
nucleus “control” the cell?
1.
2.
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5.
Nucleus is full of DNA
DNA strands have genes
Nucleolus has RNA
RNA copies part of the DNA
That copy is the instructions
to produce proteins
6. Proteins are used for most
functions of the cell
Smooth Endoplasmic
Reticulum (Smooth E.R.)
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Huge surface area for chemical reactions to
take place.
Can have different functions depending on
the cell type. Examples:
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Synthesis of lipids
Metabolism of carbohydrates
Detoxification of drugs / poisons
Smooth E.R.
Lysosomes
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Membrane enclosed sacs of digestive
enzymes.
These enzymes can digest lipids, proteins,
complex carbohydrates and nucleic acids!
Functions:
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Digest old cell parts
Intracellular digestion
Development
example: WBC’s
Protoplasm
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Protoplasm = Cytoplasm + Nucleoplasm
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Cytoplasm = Cytosol + Organelles
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Q: Why do people with Cystic Fibrosis take
digestive enzymes?
A:
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Cystic fibrosis can cause digestive problems because thick,
sticky mucus affects the function of the pancreas.
This mucus blocks the ducts of the pancreas, preventing
pancreatic enzymes from reaching the intestines to aid
digestion.
Babies with C.F. may have meconium ileus, a blockage of
the intestine - shortly after birth.
*F.Y.I. Pancreatic juices include a number of enzymes
including peptidases, pancreatic lipase and amylase!
Source: http://ghr.nlm.nih.gov/condition/cystic-fibrosis
Exit Ticket
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Explain how the following cell parts work
together:
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Nucleus
DNA
Rough ER
Ribosome
Vesicle
Golgi
Golgi
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Modifies, stores and transports cell products
(mostly protein)
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Part of
endo-membrane
system!
Mitochondria
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Site of cellular respiration  converts
chemical energy into ATP (usable energy)
Double membrane organelle, contains own
DNA and ribosomes.
Chloroplasts
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Contain chlorophyll
Site of photosynthesis  converts solar
energy into chemical energy
Double membrane organelle, contains own
DNA and ribosomes.
Mitochondria & Chloroplast
Working Together
http://www.teachersdomain.org/asset/lsps07_in
t_cellenergy/
Cytoskeleton
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Notes
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2.
3.
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6.
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8.
How would you decide if something is living? Can you
easily define life?
Why is the nucleus nicknamed the “control centre” of the
cell? How exactly does it control the cell?
Explain the importance of energy to living things. Be
sure to mention the three main types of energy in your
answer.
What is metabolism? Why could you consider this the
most important life activity?
Explain how the following organelles could work
together: cell membrane, lysosome, vesicle,
mitochondria and ribosome.
How are proteins destined for export from a cell typically
modified prior to secretion?
A cell is like a small community. Identify five cell parts
that have a similar function to parts of your community.
List three cell structures that have folded membranes.
Explain how the folded membranes help each structure
function.
Stem Cell Video
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http://www.pbs.org/wgbh/nova/sciencenow/32
09/04.html
Explain how the following organelles could work
together: cell membrane, lysosome, vesicle,
mitochondria and ribosome.