aim: how do plant & animal cell organelles maintain homeostasis?
DESCRIPTION
Organelles “mini-workers” inside of cells that have specific jobs Lie in the cytoplasm of both animal & plant cells (eukaryotes)TRANSCRIPT
Aim: How do plant & animal cell organelles maintain homeostasis?
DO NOW:Read the “Cell Theory Rap” handout & on loose-leaf, explain why we looked at this rap, choose 2 organelles & write down their functions.
Organelles
• “mini-workers” inside of cells that have specific jobs
• Lie in the cytoplasm of both animal & plant cells (eukaryotes)
Nucleus
• Brain of the cell• Contains DNA or genetic instructions (Nucleic
Acid)• Has a membrane with pores
Nuclear Membrane• Membrane of the nucleus• Also called nuclear envelope
Nucleolus
• Inside nucleus• Makes ribosomes
Ribosomes
• Make proteins• Found freely in cytoplasm or attached to
endoplasmic reticulum
Mitochondria
• Site of cellular respiration (chemical reaction)• ATP Energy producing organelle• Powerhouse of the cell
Vacuoles
• Storage sacs for food or water or excess waste, that will eventually be eliminated
Endoplasmic Reticulum
• Cellular highway• Allows for more efficient transport inside of
cells• 2 Types: Smooth & Rough• Rough: contains ribosomes, which make
proteins• Smooth: no ribosomes
Golgi Bodies / Apparati
• Packaging organelle for proteins (sorts, modifies & packs proteins)
Lysosomes
• Located in both animal and plant cells• Contain digestive enzymes for breakdown of
wastes (Ex. damaged cells or old cell parts)
Centrioles
• Only in animal cells• Look like cylinders• In pairs, near the nucleus• Involved in cell division
Chloroplast
• Only in Plant Cells• Site of Photosynthesis (chemical reaction)• Food (Glucose) Producer• Contains chlorophyll pigment (allows for
absorption of sunlight)
Cell Membrane
• Barrier between inside & outside of cells• Regulates what enters & exits cells
Cell Wall
• Made of cellulose (tough carbohydrate)• Lies outside the cell membrane in plant cells
and bacteria, fungal organisms and some protists
• Offers Support & Protection
Cytoplasm
• Similar function to that of the human body’s circulatory system
• Site of most chemical reactions in a cell• Holds organelles in place• Mostly made of water• “gel-like” fluid that surrounds the nucleus
Brain-Pop Video
• https://www.brainpop.com/science/cellularlifeandgenetics/cellstructures/
Activity
Homework
• Castle Learning Questions on Organelles