Chapter 5 Test Review

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Class Topics
Title Biology 11/9/07
Objectives

• To learn about cellular transport.

• Chapter 5 Test Review
• Begin working on Chapter 6
• Never leave that till tomorrow which you can do
  today.
• Benjamin Franklin

Sunday, November 15, 2009 1148 PM
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Class Assignments
By When
What

• Chapter 5 Test 11/12/07
• Due this class period
• Due next class period
• Due in the future

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Death by Osmosis
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One more review of the nervous system
From http//www.biology.ucsd.edu/classes/bild2.SU
2.07/documents/Lect12.pdf
5
Test Review

• Passive transport (no energy)
• Diffusion
• From high to low
• Food coloring in beaker
• O2, CO2
• Osmosis (diffusion of water)
• Hypotonic cell swells
• Hyperonic cell shrinks
• Isotonic equal water flow
• Facilitated diffusion
• Transport proteins (selective pathways)
• Sugar into cells (high to low)
• Ion channels

6
Test Review

• Active transport
• Uses energy (ATP)
• Against (up) concentration gradient
• Transport proteins
• Ex. Na/K pump (low to high)
• Bulk Transport
• Endocytosis into the cell
• Exocytosis- out of the cell
• Secretion products (carbs, hormones)

7
Test Review

• Essay
• Why is it dangerous to drink salt water?

8
Test Review

• Paramecium
• High salt concentration few contraction of
  vacuole
• Low salt concentration many contractions of the
  vacuole
• No contractions?
• Why does water enter?

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Cellular Energy

• Adenosine adenine ribose
• ATP - adenosine tri(3)phosphate - used by the
  cell for energy
• Energy currency
• Energy stored in PO43- bonds
• ADP - Adenosine Di(2)phosphate - used to
  regenerate ATP
• Burning vs cellular respiration
• Burning is uncontrolled (fast), cellular
  respiration controlled by enzymes (slow)

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ATP/ADP cycle

• Energy used for growth, reproduction, movement
  and active transport
• Drives most of cells activities

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Terminology

• Autotroph
• Obtains energy from light
• Heterotroph
• Obtains energy from other sources
• Trophic levels
• Ex. Sun plant herbivore carnivore
• Cellular respiration
• Process used to harvest energy from organic
  compounds
• Photosynthesis
• Process by which light energy is converted to
  chemical energy

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Photosynthesis

• Taking light energy and changing it to chemical
  energy to make organic compounds
• occurs in chloroplasts (only autotrophs)
• Sun
• The source for all living things energy
• 6CO2 6 H20 C6H12O6 6O2
• Different from book

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Chloroplasts

• Site of photosynthesis
• Composed of
• grana - stacks of thylakoids - contain pigment
  (chlorophyll)
• site of light dependent reaction
• stroma - the fluid around the grana
• site of light independent reaction