nat review 2011
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NAT REVIEW2011
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Parts of the Cell
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What are the main parts?• Cell Membrane
• Cytoplasm• Nucleus
CELL MEMBRANE• holds the cell together
CYTOPLASM• fill most of the cell
NUCLEUS• governing body
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What are the parts unique to each cell?
ANIMAL CELL
• Centriolesfor cell division
• Lysosomes“suicidal sac”
PLANT CELL
• Cell Wall• Plastids
chemical factories
• Chloroplastfor
photosynthesis
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CELL TRANSPORT
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How Are Diffusion and Osmosis Alike?
• Both involve movement of molecules from higher to lower concentration
• These processes are like rolling a ball downhill because energy is not required.
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How is Diffusion Different from Osmosis?
Diffusion• Movement of molecules in a liquid, gas or
a solid• A membrane may or may not be involved
Osmosis• Movement of water molecules• A membrane is involved
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Osmosis: Blood Cells
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Endocytosis and Exocytosis
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PHOTOSYNTHESIS
What are the raw materials and product?
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CELL RESPIRATION
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RAW MATERIAL
END PRODUCTS ATP NADH FADH2
Site
Glycolysis Glucose Pyruvic Acid/
pyruvate
Gross ATP-4
Net ATP-2
2 Cytosol / Cytoplasm
Krebs Cycle
Pyruvic Acid
2 10 2 matrix
ETC 34 Inner mitochondrial
membrane
TOTAL Gross ATP-38(-2) Net ATP-36
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Keep in Mind1 NADH = 3 ATP1 FADH2 = 2 ATP
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CELL DIVISION
MITOSIS AND MEIOSIS
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Cell Cycle
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MITOSIS
Division of Somatic Cells
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MEIOSIS• Division of Sex
Cells or Gametes
• Produces haploid number of chromosomes
• 2 Stages:
Meiosis I
Meiosis II
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Terms to remember:• Tetrad – a structure containing 4
chromatids that forms during meiosis.• Homologous chromosome – term
used to refer to chromosomes that each have a corresponding chromosome from the opposite sex-parent.
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• Chiasma – chiasmata (pl) site of crossing-over
• Crossing-over – exchange of genes between pairs of homologous chromosomes
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MITOSIS MEIOSIS
TYPE OF CELL Somatic/ body cells
Sex/ Germ cells
# of DAUGHTER CELLS PRODUCED
1:2 1:4
# of CHROMOSOMES
BEFORE
2n 2n
# of CHROMOSOMES
AFTER
2nDiploid
nhaploid
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Organ System
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Skeletal System• Major Organs:
Bones, cartilage, tendons and ligaments
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Muscular System• Major Organs:
Skeletal muscles and smooth muscles throughout the body.
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Circulatory System• Major Organs:
Heart, blood vessels and blood
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Nervous System• Major Organs:
Brain, spinal cord and peripheral nerves
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Respiratory System• Major Organs:
Nose, trachea and lungs
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Digestive System• Major Organs:
Mouth, esophagus, stomach, small and large intestines.
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Excretory System• Major Organs:
Kidneys, ureters, bladder and urethra.
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Female and Male Reproductive System
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ECOSYSTEM
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COMPONENTS OF THE ECOSYSTEM
•BIOTIC •ABIOTIC
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Interactions in the Ecosystem
•Abiotic – Abiotic•Abiotic – Biotic•Biotic - Biotic
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ECOLOGICAL RELATIONSHIPS
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• Cooperation• Competition• PredationSYMBIOSIS• Mutualism• Parasitism• Commensalism
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ENERGY FLOW
FOOD CHAIN AND FOOD WEB
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GENETICS
MONOHYBRID CROSS,DIHYBRID CROSS
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EVOLUTION
DARWIN AND LAMARCK THEORY
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The end
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