Transcript Cell Functions Test Review

Cell Functions Test
Review
2014
Organelles
• Nucleus: control center of a cell; contains DNA
• Nuclear membrane: surrounds nucleus – determines what goes in/out of nucleus
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Cytoplasm: jelly like substance that fills in the cell
Cell Membrane: determines what goes in/out of cell
Mitochondria: provides energy for the cell
Vacuole: stores water, waste, and other materials for the cell
Cell Wall: surrounds and protects plant cell; gives plant cell a
rigid shape
• Chloroplast: absorbs energy from the sun for photosynthesis
Draw and Label the Animal and
Plant Cells
Photosynthesis
• What is photosynthesis?
• Process where plants make their own food
• What is required for photosynthesis to occur?
• Water
carbon dioxide
sun
• What is created during photosynthesis?
• Glucose
oxygen
• What is the formula for photosynthesis?
• Carbon dioxide + water  glucose + oxygen
• What energy transformation occurs during
photosynthesis?
• Radiant energy  chemical energy
Photosynthesis Diagram
sun
oxygen
Carbon dioxide
water
glucose
Stimulus and Response
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Stimulus: something that causes a change
Response: the reaction to the stimulus
Internal: inside
External: outside
Stimulus and Response
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Tropism: growth response of a plant to a stimulus
Geotropism: plant roots grow towards gravity
Phototropism: plants grow to face the sun
Turgor pressure: pressure created inside of plant cells
by the amount of water in the vacuole
• Wilted: little water – vacuole shrinks
• Turgid: lots of water – vacuole is full
Tropism
• Geotropism
• Phototropism
Turgor Pressure
• Turgid
• Wilted
How is turgor pressure an example
of stimulus and response?
• Stimulus: lack of water
• Response: vacuoles shrink; plant wilts
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• Stimulus: too much water
• Response: vacuoles fill up and cells can burst