cells (bio chap 1 sec 3)

• cell membrane is located surrounding the cytoplasm of the cell
• cell membrane is made out of lipids and proteins
• cell membrane controls the movement of substances in and out of the cell
• cell wall can be located surrounding the cell membrane ( enclosing the entire plant cell)
• cell wall is made out of cellulose
• cell wall protects the cell from injury and gives plant cells a fixed shape
• cytoplasm fills the inside of the cell ( enclosed by the cell membrane)
• cytoplasm is a jelly-like substance
• cytoplasm is a location where most cell activities occur
• nucleus contains genetic information in the form of chromosomes
• nucleus controls cell activities such as cell growth and reparation of worn-out cell parts
• nucleus is essential for cell division
• vacuoles are a fluid-filled space enclosed in a partially permeable membrane
• vacuoles store substances within the cell
• a vacuole in an animal cell contains food and water substances
• there is many small temporary vacuoles in an animal cell
• a vacuole in a plant cell contains dissolved substances such as sugars, mineral salts and animo acids
• there is one large central permanent vacuole in a plant cell
• mitochondria are small oval organelles bound by a membrane
• mitochondria is needed to break down glucose in the presence of oxygen to release energy for cell activities (this process is called aerobic respiration)
• ribosomes are needed to synthesize proteins in the cell
• chloroplast are needed to make photosynthesis through a process called chlorophyll