Cell Structure and Function. Flashcards
What are the 4 main cell functions?
respiration
growth
excretion
irritability
What is the cell membrane and what does it do?
outer coating that selectively transports different substances in and out of the cells.
What is the nucleus and what does it do?
control centre of the cell, regulates the general and the specialist functions.
What are the ribosomes and what do they do?
they manufacture other proteins.
What are the ribosomes made up of?
ribonucleic acid (RNA) and proteins.
Where is the mitochondria and what does it do?
located in the cytoplasm.
supply the cell’s energy sources.
What does the rough and smooth endoplasmic reticulum do with the materials in the cell?
manufactures, stores, and transports the materials in and out of the cell.
What are the centrioles essential for?
cell division.
What do the lysosomes contain and what do they do?
contains enzymes that are able to digest the worn out parts of the cell for recycling and eliminating the waste products.
What does the golgi body do?
modifies and stores the manufactured protein and transports it out of the cell.
What happens in cell division?
human cells reproduce, replicate and then divide into two identical daughter cells.
What is cell division also known as?
mitosis.
What type of catalysts are enzymes?
protein catalysts.
What do enzymes enable?
enable metabolic reactions at low temperatures.
Question: How are proteins involved in all cell functions?
Cells grow to maturity by manufacturing proteins which then divide or specialise. Enzymes, which are proteins, mediate many cell functions. Ribosomes, which are inside human cells, are made of RNA and protein, and they manufacture other proteins.
