Robert Johnson
AP2530/ Unit 2 Assignment 1
Crash Course Biology 4

This crash course video covered a lot of information in a few minutes. He talked about the differences in plant and animal cells. Plant cells have cell membranes and cell walls, and is why they can’t dance or evolve. They can make their own food though which is cool. Animals have flex membranes and is why they have muscle cells for movement. Robert Hooke discovered the cell in 1665 with his beta version microscope. But he had no idea what would be found later. A cell is like a city with walls that only allow certain things in. there is a power plant for energy, waste services, palace in the center and even a police force. The cell runs like a dictatorship. The nucleus tells everything what to do with no exceptions. The Mitochondria makes the energy for the cell but has its own DNA. The mitochondria of a woman is the only one passed to the child, not the fathers Mito. Basically the cell has lots of parts and works with billions of other cell.
Robert Johnson Crash course Biology 5

In this crash course it’s talking about cell transport mostly. Cells need to be selective in what it lets in and what it want out like a night club. Water is like a celebrity and sugar is on a waiting list with others. There are two kinds of transport, active and passive. Passive transport uses no energy and lets things like water and oxygen move back and forth to less crowded areas causing uniformed mass, which is called Diffusion. The other transport is active and uses energy or ATP. This is needed when moving against the normal movement so a fee must be paid. Cells use these transports to stay in an isotonic state not a hyper or hypo state where there is no balance and could be deadly. The main gate that uses ATP is the potassium sodium pump. It was found in the 1950’s by Jens Christian Skou when studying crabs. It was easier since their cells are much larger than human cells. It was discovered that the pump allowed two potassium in and three sodium out. This process does use ATP also known as Adenosine Tri-Phosphate. Most important word to memorize with cell study per the video.
Robert Johnson
Crash Course Biology 7 This crash course deals with making energy or ATP (Adenosine Tri-Phosphate) molecules. When you work out you use energy. Before you can work out you need a buildup of currency or ATP to work out or move body for anything. There are several steps to making ATP. First you must convert your food you eat to Glucose, also known as sugar. One Glucose molecule can create thirty eight Adenosine Tri-Phosphate (ATP). Breaking down the glucose is an anaerobic process called Glycolysis. When your muscles create lactic acid after a workout and you become sore, its lack of oxygen so is an Aerobic endeavor. Hans Krebs who was an EAR, Nose and throat doctor discovered the Krebs cycle in 1937. Also known as the citric Acid cycle do to it’s by products. The end of the