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6th Grade- Sci Ch 1

Cell membrane Controls the substances that enter and leave the cell.
Anton von Leeuwenhoek The first person to see bacteria from his teeth scrapings.
Magnification The ability to make things look larger than they are.
Endoplasmic reticulum Passageways that transport proteins to the cell.
Cell wall A strong layer of cellulose that surrounds only plant cells.
Resolution The ability to clearly distinguish the parts of an object.
Ribosomes These organelles produce proteins.
Mitochondria These organelles produce energy for the cell.
Golgi bodies These organelles receives proteins and package them for delivery to the cell.
Nucleus The "brain" of the cell.
Cytoplasm Gel-like substance between the nucleus and cell membrane.
Chloroplasts Traps the suns energy to produce food for the cell.
Vacuole Part of the cell that stores food, water, and wastes.
Lipids Fats, waxes and oils.
DNA This is shaped like a twisted ladder.
Diffusion The process by which molecules move from an area of higher to lower concentration (spraying perfume in a room and later smelling it and all parts of the room).
Selectively permeable A cell membrane is this. It means that some substances can pass through but others cannot.
Osmosis The diffusion of water molecules through a membrane from a higher to lower concentration.
Genes Located on the chromosomes, these sections of DNA determine an organism's characteristics and control its development and growth.
Chromosomes These contain the genes. I human has 23 pairs.
Two reasons why it's important for a cell membrane to be selectively permeable? 1. It lets things in. (Oxygen, carbon dioxide, water, nutrients) 2. It keeps things out. (Salt, large molecules).
What does a cell membrane let in? Oxygen, carbon dioxide, water, nutrients.
What does a cell membrane keep out? Salt, large molecules.
List three ways a plant cell and an animal cells are similar. They both have a cell membrane, cytoplasm, and a vacuole.
List three ways a plant cell and an animal cell are different. Only plant cells have a cell wall, chloroplasts, and chlorophyll.
Created by: runsl8