CELLS and how they relate to Life Functions

CELLS and how they relate to Life Functions

Do Now Please complete the following: 1) Put belongings away 2) Have vocabulary on your desk for a check 3) Turn to your organelle note sheet (with the 2 cell diagrams) 3. Cytoplasm

Thick-fluid solution filling cells, enclosed by the membrane Site of most chemical reactions 4. Nucleus Controls all the activities of the cell

Contains Chromosomes (DNA) Brain of the cell Surrounded by a Nuclear Envelope, separating it from the rest of the cell Contains Nucleolus, lil Nucleas Makes RNA

5. Ribosomes Site of protein synthesis Where proteins are made Can be floating free in cytoplasm or attached to Endoplasmic Reticulum Helps to transport proteins

Maze of passage ways 6. Chloroplasts* **Not found in animal cells** Site of photosynthesis Contains green pigment Chlorophyll

7. Mitochondria Site of cellular respiration Where chemical reactions occur producing energy (ATP) Power house of the cell Contain their own DNA and can

replicate Sometimes are linked with ribosomes 8. Vacuole Stores nutrients for energy and wastes Large, round sac-like structure generally storing water

MUCH larger in plant cells which can have central vacuole. CELLS and how they relate to Life Functions The Cell Theory

The cell is the basic unit of structure. All living things are made up of one or more cells. The Cell Theory A cell is the smallest unit that is capable of performing all the life functions.

The Cell Theory All cells come from pre-existing cells. Through mitosis one cell makes 2 cells, etc. Exceptions to the Theory Viruses: Cannot replicate except in a host Mitochondria & Chloroplastshave

their own DNA and can replicate Cell Membrane Helps control: Regulation: Membrane nutrients and small molecules in. Keeps large molecules and

bad stuff out allows Cell Membrane Excretion: All waste products exit through the membrane

Carbon dioxide Cell Membrane Transport: materials are ABSORBED Nutrition The

ingestion of food Cell Membrane GROWT H The membrane must increase in size

Cytoplasm Synthesis lots of molecules are made here Growth an increase in the number of molecules = growth

Transport : diffusion Chloroplasts Only in plant cells, convert sun light to energy

Synthesis site of PHOTOSYNTHESIS Reproduction they have their own DNA and can make copies of themselves Synthesis make proteins at their own ribosomes

Mitochondria Respiration site of aerobic respiration Reproduction they have their own DNA and can make copies of themselves Synthesis make

proteins at their own ribosomes Nucleus Reproduction Mitosis starts here Synthesis - makes new DNA chromosomes

Regulation the DNA controls all cell activities http://www.familytreedna.com/img/understandingdna/cell_diagram.gif Ribosome Synthesis makes proteins

Growth an increase in Protein Ribosome the number of molecules leads to

growth Vacuole Excretion stores wastes Nutrition stores food

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