• Chapter 4:

- Cell theory

- Prokaryotic vs. Eukaryotic

- Characteristics of all cells

- Prokaryotic cells

- Animal vs. plant cells

- Parts of the cell and functions

• If time: Intro to Chapter 5

Cell Theory

Human Brain Cell Breast Cancer Cell Human Fat Cell Red Blood Cells

•The cell is the fundamental unit of structure

and function in living things

•All cells come from pre-existing cells by

division

•Energy flow occurs within cells

Prokaryotic vs. Eukaryotic Cells

Fig 1.3, pg 4

Features Found in All Cells

•DNA and RNA

•Ribosomes

•Proteins doing

work

•Cytoplasm

•Cell

membrane

Cell Membranes

Phospholipid bilayer: helps membranes to be

selectively permeable

Plasma Membrane: Fluid Mosaic of Phospholipids and Proteins

Fig 5.1, pg74

Functions of Membrane Proteins 1 - Enzyme activity

2 – Receptors

3 - Transport

Prokaryotic Cell

Fig 4.3, pg 55

Eukaryotic Cells:

Animal vs. Plant Cells

Animal Cells

• Centriole

• Lysosome

Plant Cells

• Cell wall

• Chloroplast

• Central vacuole

The Nucleus

• Contains DNA

• Directs protein synthesis

Fig 4.5, pg 58

Organelles of the Endomembrane System

Smooth Endoplasmic Reticulum

• No attached ribosomes

• Synthesis of lipids

• In liver, help process harmful substances

Fig 4.8a, pg 60

Rough Endoplasmic Reticulum

• Attached ribosomes

• Makes more membrane

• Modification of proteins

Fig 4.8b, pg 60

Golgi Apparatus

• “Shipping & Receiving”

• Receives and modifies ER products

Fig 4.9, pg 61

Lysosome

• Digestive functions

• Recycling of damaged organelles

Fig 4.10, pg 62

A review of the endomembrane system

Fig 4.12, pg 63

Energy-Converting Organelles

Chloroplasts

• Photosynthesis!

Mitochondria

• Cellular respiration (convert chemical

energy of food to ATP)

Fig 4.13, pg 63

Support: Cytoskeleton

Fig 4.16, pg 65

Cilia and Flagella

Cilia in the human

respiratory tract Flagella on a single-

celled protist