Bio Stuff 4 Flashcards
Photosynthesis equation
6H2O + 6CO2 –> C6H12O6 (aq) +6O2(g)
What does the photosynthesis equation represent?
Carbon dioxide+ Water converted through chlorophyll+sunlight= glucose and oxygen
What are light and chlorophyll not considered as
Reactants or products
What is the inverse of photosynthesis?
Cellular respiration
Cellular respiration equation
C6H12O6(aq) + 6O2(g) —> 6CO2+ 6H2O+energy(ATP)
What is ATP
Source of energy for use and storage at the cellular lever called adenosine triphosphate
Where does cellular respiration occur?
Begins in cytoplasm and completed in mitochondria
Cellular respiration
Breaking down simple sugars into carbon dioxide and water, releasing that energy in the form of ATP
What occurs in the dark
Cellular respiration
Which respite at a lower rate and why?
Plant tissue; need sunlight
Leaf tissues and gas exchange
Gas exchange via passive diffusion is too lengthy, specialized cells are need to maximize this and provide reactants/remove products of the leafs cellular activities
Dermal tissue
Made up of Guard cells (specialized), form tiny openings/pores called stomata; majority found on the underside of the leaf(underside of leaf)
Stomata
Regulate gas exchange
What is mesohpyll spongy tissue
Spongy; between palisade cells and lower epidermis, loosely packed, irregularly shaped, moves oxygen toward stomata for expulsion, moves CO2 from air toward palisade cells
How do guard cells work
Control when stomata open or close, shrink to close stomata, swell up to open stomata (outer walls of guard cell thinner than inner walls so cell bulges outward causing stoma to open)
How does light affect guard cells?
Swell due to increased turgor pressure, accumulate potassium ions
How does water and temperature affect stomata?
When water is not readily available guard cells become limp and stomata close, (hot dry climates=less stomata)
How does carbon dioxide affect stomata?
Lower co2=stomata open up more (loss of nutrients and protein? Polar charges)
What are palaside tissue cells?
Found jus bellow upper epidermis, long, rigid, exposed to sunrays, responsible for photosynthesis has chloroplasts
What is mesophyll
Two types of specialized cells; palisade and spongy mesophyll tissue cells
Vascular tissue
Provides leaf with water for transpiration and photosynthesis, leaf veins contain vascular tissue
What is a vascular bundle
Xylem and phloem tissues bunches together
What are lenticels?
Natural openings; pores along woody stems and mature roots, provide pathway for gas exchange similar to stomata
How are lenticels created?
Results of split in secondary outer tissues that replace epidermis
