CELLS - Weebly

CELLS - Weebly

CELLS LESSON 7 NOTES A. Basic Cell Info 1. Basic unit of life 2. Organelle: well-defined structure found in a

cell 3. All cells have: a) b) c)

Cell membrane: Cytoplasm: Nucleus: command central A. Basic Cell Info continued 4. Animal Cell specific organelle:

a) Lysosome 1) Digestive enzymes 5. Plant Cell specific organelles:

a) Chloroplasts: 1) Green, disc-shaped structures circulating along perimeter of cell

2) contain chlorophyll 3) Photosynthesis can occur b) Cell wall

1) Nonliving part of cell B. Spirogyra 1.

2. 3. Freshwater algae Cells arranged in long filaments chloroplasts & chlorophyll

a) Photosynthesis can occur 4. Cellulose in their cell wall 5.

Pyrenoids: a) dark protein structure within chloroplast that store starch

6. Reproduction: a) b) Asexually separate into fragments Sexually conjugation (figure 7.4)

C. Elodea Leaves 1. Refer to figure 7.3 2. Freshwater: a) b)

c) Concentration water higher outside cell Water moves into cell cell swells Turgor Pressure: keeps cell from busting

3. Saltwater: a) Concentration water higher inside cell b) Water moves out cell cell shrinks (PLASMOLYSIS) D. Nerve Cell (Neurons)

1. Dendrites: receive electrical nerve impulses 2. Axon: transfer impulse to another neuron, muscle, or gland cell 3. Cell Body: neurons nucleus

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