Class 1: INTRODUCTION TO CELL

Class 1: INTRODUCTION TO CELL

THREE COMPONENTS OF CELL THEORY

1) All living organisms are composed of one or more cells

2) A cell is the basic structural and functional unit of organisms

3) All cells come from pre-existing cells

TWO BASIC CELL TYPES

Prokaryote & Eukaryote

source: PHGY 170

Make sure to know all of these important differences between prokaryotes & eukaryotes

source: Biology Dictionary

source: Genetic Education

Practice picturing the top 2 images in your head for your exam

Practice Qs on Prokaryotes vs. Eukaryotes (**BEST RESOURCE**)

source: http://birdmanscience.weebly.com/uploads/5/6/5/7/56574945/prokaryotes_vs._eukaryotes___print_-_quizizz.pdf

Answer Key

CELL TYPES IN HUMAN BODY

1. Epithelial cells: protective barriers of tissues + may absorb & secrete certain compounds

source: https://www.beckman.com/resources/cell-types/epithelial-cells

2. Muscle cells: allow movement of skeleton, heart and other organs such as the stomach

source: https://www.dkfindout.com/us/gallery/human-body/types-muscle-cells/

3. Nerve cells: send electrical signals throughout the body + responsible for muscle contractions and the five senses

source: https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.mpg.de%2F15268319%2Fneurons-mitochondrial-dysfunction&psig=AOvVaw2MJLesv_zAN7Det04ZBmDY&ust=1699546859735000&source=images&cd=vfe&opi=89978449&ved=0CBIQjRxqFwoTCPD2o8nntIIDFQAAAAAdAAAAABAE

4. Connective tissue cells: synthesizes extracellular matrix that holds cells together

source: https://www.thoughtco.com/connective-tissue-anatomy-373207

5. Bone cells: form the skeleton of the body

source: https://www.orthobullets.com/basic-science/9002/bone-cells

6. Secretory cells: form glands that secrete certain substances

source: https://www.sciencephoto.com/media/309992/view/tem-of-goblet-and-secretory-cells-in-duodenum

7. Adipose cells: fat cells that store fat

source: https://www.sciencephoto.com/media/1152314/view/adipose-tissue-light-micrograph

8. Red blood cells: synthesized in the bone marrow, then released into circulation for delivery of nutrients and oxygen to tissues

source: https://www.medicalnewstoday.com/articles/red-blood-cell-disorders-types-causes-and-symptoms#definition

OVERVIEW OF CELLULAR STRUCTURES

source: PHGY 170

Make sure to know the functions of each cellular structure

source: https://www.sepmag.eu/blog/cell-centrifugation

Practice picturing these different cellular structures in your head for your exam

Practice Qs on Labeling Cellular Structures (BEST RESOURCE)

source: https://www.oxfordsd.org/cms/lib/MS01001032/Centricity/Domain/758/Cell%20Organelles%20Worksheet%202%20.pdf

Answer Key