Tana's Science Blog

Cardiovascular System

2009-02-24T12:07:00.000-08:00

2.) Low oxygen blood enters body, right atrium. Low oxygen blood leaves heart to lungs through right ventricle. High oxygen blood enters heart from lungs through left atrium. High oxygen blood to body through left ventricle.

3.) Q: Why do their heart rates increase when they are playing?
A: Because your body needs to pump more oxygen.

4.) Q: How does diet affect the cardiovascular system? What typed of foods should athletes eat to have a healthy heart?
A: If you don't eat right your heart will beat fast, for being low on energy. Types of food that athletes should eat are very healthy foods, foods that don't affect the heart in a bad way.

5.) Q: How does substance abuse affect the heart? Why is this bad for an athlete?
A: Thickens your muscle of the heart, some drugs stop the heart. This would be bad for an athlete because they need a good heart to be able to run and do other activities. =]

characteristics of bacteria

2008-11-03T11:47:00.001-08:00

1. Bacteria are different than eukaryotic cells in several ways.

no nucleus

10x smaller

DNA in circular structure

reproduce by binary fission

single cellular structure

use flagella to move

can use anaerobic respiration and aerobic

3. Gram staining is importana in medicine because the two groups of bacteria differ in their susceptibility to different antibiotic would be most usefu in fighting an infection.

4. Conjugation is a process in which two organisms exchange genetic material.

Parts of a Cell. =]

2008-10-03T11:29:00.000-07:00

*Nucleus: An internal compartment that houses the cell's DNA.

*Mitochondrian: Orgenelle that harvests energy ffom organic compounds to make ATP.

*Lysosomes: Small, spherical organelles that contain the cell digestive energy.

*Cell Membrane: Encloses the cell and separates the cell interior.

*Ribosomes: The cellular stuctures on which protiens are made.

*Endoplasmic Reticula (ER): An extensive system of internal membrane that move protiens and other substances through the cell.

*Cytoplasm: Regulates what enters and leaves the cell.

*Golgi Aparatus: An organelle that packeges and distributes molecules produced by a eukaryotic cell.

*Vacuole: Membranebound cavity in plant cells used for storage.

*Chloroplast: Organelle that uses light energy to make carbohydrates from carbon dioxide and water.

*Cell Wall: The structure that surrounds the cell membrane and provides support for the cell.

camas..

2008-05-08T13:18:00.000-07:00

Two varieties of camas were considered the staple food items and were abundant in several areas. The "Brown" camas, an onion like bulb, was dug in damp meadows. It was dried in large fire pits in layers separated by moss and eaten whole or added to fish and meat for seasoning. The "White" camas is found in rocky areas of the plateau country. It was used primarily for making flour. Today the "Brown" camas is found in several places on the Spokane Reservation and just to the north of Camas Prairie. The "White" camas is usually dug in an area between Davenport and Creston, Washington.

newtons laws of motion

2008-04-24T13:02:00.000-07:00

--Newton’s Laws
1. An object at rest remains at rest and object in motion maintains its velocity unless it experiences an unbalanced force.

2. The unbalanced force acting on an object equals the object’s mass times its acceleration.

3. The acceleration of an object is proportional to the net force on the object and inversely proportional to the object’s mass.