1 / 12

Section 5-3 & 5-5 “Cancer & Stem Cells ”

Section 5-3 & 5-5 “Cancer & Stem Cells ”. Write everything that is underlined. 5.3 KEY CONCEPT Cell cycle regulation is necessary for healthy growth. I. Cell Division 1. Internal and external factors regulate (control) cell division. a. External factors include physical and chemical signals

atalo
Télécharger la présentation

Section 5-3 & 5-5 “Cancer & Stem Cells ”

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. Section 5-3 & 5-5“Cancer & Stem Cells” Write everything that isunderlined

  2. 5.3 KEY CONCEPTCell cycle regulation is necessary for healthy growth

  3. I. Cell Division1. Internal and external factors regulate (control) cell division a. External factors include physical and chemical signals b. Growth factors are proteins that stimulate cell division • Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells

  4. webbed fingers 2. Apoptosis is programmed cell death • a normal feature of healthy organisms • caused by a cell’s production of self-destructive enzymes • occurs indevelopmentof infants

  5. II. Cancer Cells 1. Cell division is uncontrolled in cancer 2. Cancer cells form disorganized clumps called tumors • Benign (good) tumors remain clustered and can be removed • Malignant (bad) tumors metastasize, or break away, and can form more tumors

  6. normal cell cancer cell bloodstream

  7. 3. Cancer cells do not carry out their necessary functions 4. Cancer cells come from normal cells with damage to genes involved in cell-cycle regulation

  8. 5. Carcinogens are substances known to cause cancer 6. Standard cancer treatments typically kill both cancerous and healthy cells

  9. 5.5 KEY CONCEPT Cells work together to carry out complex functions

  10. Inner: intestines Outer: skin cells Middle: bone cells I. Specialized Cells1. Specialized cells perform specific functions. • Cells develop into their mature forms through the process of cell differentiation 2. Cells are different because different combinations of genes are expressed • A cell’s location in an embryo helps determine how it will differentiate

  11. II. Stem Cells1. Stem cells are unique body cells. 2. Stem cells have the ability to: • divide and renew themselves • remain undifferentiated in form • develop into a variety of specialized cell types

  12. First, an egg is fertilized by a sperm cell in a petri dish. The egg divides, forming an inner cell mass. These cells are then removed and grown with nutrients. Scientists try to control how the cells specialize by adding or removing certain molecules. • Adult stem cells can be hard to isolate and grow. • The use of adult stem cells may prevent transplant rejection. • The use of embryonicstem cells raisesethical issues • Embryonic stem cellscan be grown indefinitelyin culture. • Stem cells come from adults and embryos

More Related