作者：Molly Stanhope 5 年以前
97
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Pages: 59, 60, 62, 63, 64, 66, 67, 68, 70 Crash Course
A body is like a building, it has plumbing, heating, cooling, and electricity. All these systems work together to make the building work. If any of those systems break down, the whole building is compromised. plumbing, heating, cooling, and electricity. All these systems work together to make the building work. If any of those systems break down, the whole building is compromised.
Cells work together by bonding with similar cells to create tissues. Cells that bond with different cells create organs.
The primary types of tissue are muscle, epithelial, connective, and nervous tissue. All of these tissues are found in every organ system. These types of muscles allow our bodies to function properly. The main function of muscle tissue is to contract. The main function of epithelial tissue is to cover the body surface and line internal cavities. Support and connection are the main functions of connective tissue and the main functions for nervous tissue are to receive stimuli and conduct impulses. All four of these tissues work together to protect to our bodies from the outside world.
Organ systems work together to maintain our body and keep it in a stable state. I am going to give an example of how some organ systems work together. The digestive system absorbs water and nutrients from food. The circulatory system carries oxygen, water, and nutrients to cells throughout the body. The waste then is eliminated by the respiratory and excretory systems which are controlled by the nervous system.
Pages: 34, 44, 45, 46, 51, 53 Crash Course Sex, Disease, and Extinction
In an article I read, it said that copying mistakes account for nearly 2/3 of the mutations that cause cancer. For example, 95% of cancer-causing mutations in brain or bone cancer are caused by copying errors. People who take all the correct steps to avoid cancer can still be diagnosed with it. Copy errors are undervalued because most people don't know about them.
You can predict which traits offspring will inherit by using punnet squares, pedigrees, and dihybrid crosses.
Mutations, gene flow, and sexual selection all cause variability within genetic code. When a mutation occurs, it a new allele due to mistakes in DNA. Gene flow occurs when animals mix with new genetically different populations. Sexual selection creates alleles for more sexually attractive organisms.
A phenotype can be predicted by using punnet squares, pedigrees, and understanding alleles. A dominant allele masks or suppresses other alleles. A recessive allele gets masked or suppressed by other alleles. Homozygous means that both alleles are the same and heterozygous means that the alleles are different.
Pages: 23, 24, 26, 28, 29, 30, 32, 38, 39 Crash Course
If I were a particle, I would have two main ways to travel around. These two types of transport are called passive and active transport. When I go through passive transport, I go from a higher concentration to a lower one and require no energy. When I go through active transport, I go from the low concentration to the medium and this transport requires ATP.
A cell is made of multiple organelles that perform different jobs within the cell.
Cells obtain and use materials through membranes and transport. The main types of transport are active and passive transport. Passive transport does not require energy whereas active transport does. For the sodium-potassium pump to work it needs ATP. When the pump has ATP, it will extrude three sodium ions and import two potassium ions.
The structure of a cell can consist a cell membrane, cytoplasm, ribosome, and cell wall. The cell membrane separates the cell from the outside environment. Cytoplasm is the "stuff" inside the cell that is always flowing. The cell wall protects the cell and provides support for the cell.
Pages: 7, 8, 9, 13, 14, 16 Percentages of Elements DNA Presentation Crash Course
If I were a plant, I'd be an iris. The way I would eat would be through photosynthesis. For this process to work I need sunlight, water, and carbon dioxide. Photosynthesis occurs in the chloroplast. After I receive all the necessary products for photosynthesis, I will produce oxygen and glucose in which humans use.
Atoms to combine to make life by using the six essential elements.
DNA is the genetic code that determines all characteristics of a living thing. In the 1900's, Thomas Hunt discovered genetics. In the 1950's, Hershey and Chase discovered genetic material. DNA is a strong, flexible double helix.
CHNOPS are the combinations of elements that are important to make life. The six elements apart of CHNOPS create the four macromolecules, carbohydrates, lipids, proteins, and nucleic acids. Oxygen is an element important we breath and it bonds well. Phosphorus is important as well because it creates our DNA.
