A&P Chapter 3 Cells

​Chapter 3: Cells

A&P 1​

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​The Marvelous Cell

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​Cytoplasmic Membrane

​-The cells barrier​

​-selects what goes in and out (selectively permeable)

​-filled with proteins and lipids

​-important for communication (signals)

-skin of the cell- maintains shape and integrity of cell and protects internal damage from changing environments​

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​Proteins in Cell Membrane

​Types

1. intregal types tranverse (convert) signals and form pores, channels, and carriers

2. Peripheral types

receptor proteins- responds to outside environment

enzymes- ​catalyze (speed up) chemical reactions

cell surface proteins- ​establishes self

cellular adhesion- ​enables cells to stick to one another

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Multiple Choice

Which of the following is NOT a function/characteristic of the cell membrane

• Responds to extra cellular environment

• Selects what molecules or chemicals come in or out

• Maintains the internal structure and shape of the cell

• A rigid inflexible structure

​Cytoplasm

• internal fluid

• ​contains the organelles, the cytoskeleton, and tiny amounts of miscelinious inclusions

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Ribosomes

​ Synthesize proteins by bonding amino acid links (putting proteins together)

Most in endoplasmic reticulum

Small amounts floating freely in the cytoplasm​

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