1 / 19

Understanding Cell Structure and Function: The Plasma Membrane and Organelles

This overview explores the fundamental components of cells, focusing on the plasma membrane's vital role in regulating material exchange essential for maintaining homeostasis. The structure of the plasma membrane is a phospholipid bilayer that exhibits selective permeability, allowing specific molecules to enter and exit the cell. We also examine the nucleus as the control center housing genetic material, as well as various organelles such as ribosomes, endoplasmic reticulum, Golgi apparatus, vacuoles, lysosomes, and mitochondria. Each structure plays a crucial role in cellular processes and energy management.

jadzia
Download Presentation

Understanding Cell Structure and Function: The Plasma Membrane and Organelles

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cell Parts Dissecting the cell

  2. Plasma Membrane • Cells must control the materials that enter and leave. • The PM is the boundary between the cell and it’s environment.

  3. Homeostasis • Homeostasis is the process of maintaining the cell’s environment. • Selective permeability is the process where a cell allows some molecules into the cell and not others.

  4. PM Structure • PM is made of a phospholipid bilayer • Two phospholipid layers • Hydrophilic – “likes” water • Hydrophobic – “afraid” of water

  5. Cytoplasm • Thick jelly-like substance that fills the cell • Allows material to be moved around the cell.

  6. Control Center The Nucleus

  7. Nucleus • The nucleus contains the genetic material for the cell • Chromosomes • Nuclear Envelope • Double membrane • Nuclear pores

  8. Chromosomes • Chromosomes are made of DNA. • DNA is the genetic material that holds all the information in the organism. • Located inside the nucleus

  9. Homework • Organelle Summary Sheet • Flashcards

  10. Assembly, Transport & Storage Other organelles

  11. Ribosomes • Ribosomes control protein synthesis • Made by the nucleolus • Found floating freely in the cytoplasm or on the rough endoplasmic reticulum

  12. Endoplasmic Reticulum • Site of chemical reactions in the cells • Rough ER • Covered in ribosomes • Smooth ER • No ribosomes

  13. Golgi Apparatus • Sorts and packages products of the ER • Sends packaged proteins to various locations around the cell • Uses vesicles as packaging

  14. Vacuoles & Lysosomes • Vacuoles are used in temporary storage of materials • Plant cells have one large vacuole while animal cells have many smaller vacuoles • Lysosomes contain digestive enzymes that break apart cellular waste for re-use

  15. Cellular Energy Mitochondria

  16. Mitochondria • Energy powerhouses for the cell • Found in plant and animal cells • Double membrane • Increased surface area for reactions

  17. Support

  18. Cytoskeleton • Interior network of support in cells • Criss-crossed web of small “support beams” • Microtubules • Microfilaments

  19. Homework • Organelle Summary Sheet • Flashcards

More Related