Flashcards in Chapter 5 Asexual Reproduction Deck (30):
Animals & their skin
Need help to get rid of their skin:
-The babies chew off the mother's skin as lunch
-Found in Kenya, Africa
B.titanus: Types of teeth
-Spoon shaped for scraping
-Spiked points for piercing
-Grappling hook designed so it can stay attached to mother
Do cells divide at the same rate?
No. They divide on different rates, and the rate depends on the function. Skin cells endure a lot of wear and tear, so they divide really fast
What cell divides the fastest? What cell divides the slowest
How are stains on your hands cleaned?
-Sometimes not by soap and water, but skin sheds instead
What controls checkpoints?
Rate of red blood cells' division
Every 120 days
Skin cells' division rate
Every 20 days
Every 30-50 years
Stomach lining cells' division rate
Every 2 days
Intestinal lining cells' division rate
Every 3 days
Liver cells' division rate
Every 200 days
When does your body growth slows?
As an adult, what types of cells continue dividing and what doesn't?
-Intestinal cells and stomach cells; cells that takes a lot of wear and tear
-Muscle cell and nerve cell usually doesn't continue to divide
Why won't muscle cells and nerve cells continue to divide when you are an adult?
Needs to be searched up
Where does most of the dust in our house came from?
70% of it comes from dead human skin cells
Brain damage is when...?
-Pathway get damaged, new pathways?????
Cells make up ~, ~ makes up ~, ~ are part of ~?
Tissues, organs, and body systems
Do organs have only one type of tissue?
No, they can have 2+ tissues
Interphase, mitosis, and cytokinesis are the three stages of cell cycle
Interphase: short summary
-The longest stage where cells are carrying out its daily functions
-Prepares for reproduction by doubling the material
Mitosis: short summary
-Usually the shortest
-Divides the duplicated contents of cell's nucleus into two equal parts(2 daughter cells identical n equal to parent cell)
Cytokinesis: short summary
-Separates the two nuclei and cell contents into two daughter cells
Interphase: Growth and preparation
-Increases in size n makes the proteins necessary for the cell to function
-Some organelles began to duplicate
Interphase: DNA Replication: summary
-Temporarily has two complete sets of DNA
-Controlled by enzymes
-Can involve up to 3X10^9 base pairs of DNA
Interphase: DNA replication: Process
-Enzymes uncoil the double helix DNA(becomes straight)
-New bases combine with each strand of DNA
-2 identical DNA are made
Interphase: Continued growth and preparation:
-After DNA replicates, cell continues to grow and makes materials(ex.protein) for the new cells
-Chromatin contains loosely coiled DNA so it can be copied into mRNA so proteins can continue to be made
-Organelles such as mitochondria and chloroplasts will be duplicated at this stage
What does the chromosomes look like as the nucleus prepares to divide?
Visible as X
-Strands of identical duplicated DNA joined together to form half of the chromosome