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Lecture 3

Organisation of the cell

QuestionAnswer
what are Organelles Organs of the cell
a system of channels that is continuous with the nuclear membrane (or “envelope”) endoplasmic reticulum (ER)
What does the endoplasmic reticulum (ER) do provides passages throughout much of the cell that function in transporting, synthesizing, and storing materials Highway from the Nucleus to the rest of the cell
How is a cell produced by division of existing cells
What is a cell The smallest unit of a living thing
What can take over a cell a virus
What is the difference between sex cells and somatic cells Somatic cells have a complete set of chromosomes (DNA) and sex cells have only 1/2 the chromosones
an organelle that serves as the site of protein synthesis (protein factories) ribosome
Main function of smooth ER Endoplasmic reticulum the synthesis of lipids
Main function of Rough ER Endoplasmic reticulum the synthesis and modification of proteins destined for the cell membrane or for export from the cell. growth of cell membrane
synthesizes (manufactures) phospholipids, steroid hormones, regulates the concentration of cellular Ca++, metabolizes some carbohydrates, and breaks down certain toxins Smooth ER Endoplasmic reticulum
responsible for sorting, modifying, and shipping off the products that come from the rough ER,much like a post-office. Golgi apparatus
an organelle that contains enzymes that break down and digest unneeded cellular components, such as a damaged organelle. or can destroy the whole cell lysosomes
The brain of the cell Nucleus
looks like stacks of pancakes or pitabread Golgi apparatus
The center of the Nucleus Nucleolus
carries most genetic information Nucleus
manipulates products from the rough ER, and also produces new organelles called lysosomes Golgi apparatus
makes ribosomal subunits Nucleolus
a group of fibrous proteins that provide structural support for cells also critical for cell motility, cell reproduction, and transportation of substances within the cell. cytoskeleton
thick jelly like solution that fills each cell and is enclosed by the cell membrane. Cytoplasm
bean-shaped organelle that is the energy-conversion factories of the cell Mitochondria
Plasma membrane Cell membrane outer cell wall
Protects the cell. regulates what can exit and enter the cell Cell membrane
inside the nuceleus surrounding the nuceleolus Chromatin (contains DNA and Protein)
the condensed form of Chromatin Chromosomes
Created by: Leonie