This document provides an overview and review of key concepts in cell biology. It begins with directions for completing an online review using an iPad or computer. The review covers organelles like the nucleus, mitochondria, chloroplasts, ribosomes, cell membrane, and their functions. It also discusses transport of materials, body systems like circulatory and reproductive, and asexual reproduction. Homeostasis, diffusion, and osmosis are defined. The review is intended to be completed within 45 minutes online or on an iPad.

1. Cell Biology HSA Review
Directions:
• Pick up an iPad or Log on to a
computer
• You may work with a partner (no
more than 2 people together)
• Go to website
• Use website to complete the review
• You have 45min to complete 

2. Organelles
 Nucleus
◦ Controls cell activities
 Mitochondria:
◦ Makes energy!
◦ Cell Respiration
 Chloroplast:
◦ Makes food for plants
◦ Photosynthesis

3. Organelles
 Ribosome
◦ Makes protein
 Cilia/Flagella
◦ Both help cell move
◦ Cilia= hair-like Flagella= tail
 Cell Membrane:
◦ Controls what enters/leaves the cell

4. Nucleus
Cell Membrane…
What’s it made
of?
Ribosomes
Mitochondria
Chloroplast
Cell Wall…
What’s it made of?

5. Transport of Materials
 Cell Membrane
◦ Controls what enters/leaves the cell
 Circulatory System
◦ Carries oxygen, nutrients to cells
◦ BLOOD!
 Vascular Tissues
◦ Carries water, nutrients to plant cells

6. Body Systems
 Circulatory System
◦ Carries oxygen, nutrients to cells
◦ BLOOD!
 Reproductive System
◦ Makes eggs/sperm (gametes) to pass on
genes to next generation
 Excretory System
◦ Removes bulk waste

7. Body Systems
 Nervous System
◦ Controls everything, Controls movement
 Endocrine System
◦ Hormones
◦ “chemicals that regulate/act at different
sites in the body”

8. Body Systems
 Skeletal System
◦ Attaches to muscles for movement
◦ Bones
 Muscular System
◦ Attaches to bones for movement
◦ Muscles

9. Body Systems
 Digestive System
◦ Breaks down food and nutrients
 Respiratory System
◦ Breathing
◦ Takes in Oxygen, releases CO2

10. Asexual Reproduction
 Mitosis
◦ Cell division in body cells
◦ To make more IDENTICAL cells
 Binary Fission
◦ Division IN BACTERIA
 Cells After Asexual Reproduction
◦ IDENTICAL to original cell
◦ Cloning

11. Homeostasis
 Definition
◦ Maintaining stable internal conditions
◦ Keeping everything in the body “normal”
 Examples:
◦ Body temperature
◦ Blood sugar
◦ Blood pressure

12. Diffusion/Osmosis
 Selectively Permeable
◦ Only allows certain things to move through
◦ The cell membrane is selectively permeable
 Diffusion
◦ Molecules move from high to low
concentration
◦ No energy required
 Osmosis
◦ WATER moves from high to low
concentration
◦ No energy required

13. Diffusion/Osmosis
Diffusion
Osmosis