7 th grade Third Six Week Review

Third Six Weeks Review What is “homeostasis?” Name some ways that your body’s systems work to maintain homeostasis so that you can stay alive. Homeostasis is regulation of an organism’s internal, life-maintaining conditions despite changes in its environment. Examples: internal body’s temperature

Third Six Week Test Review Work and the Human Body Review your two labs on this topic. 1.What is the scientific definition of “work?” work= force X distance 2. What are the units used for force? N for distance? meters for work? J 3.What tool did we use to measure force? Spring scale distance? rulers (Be able to use these tools.)

Third Six Weeks Test Review Circulatory System (Ch. 14, Sec. 1 & 2) 1.What are the levels of organization, as it relates specifically to the circulatory system? cells, blood, heart, circulatory system 2.What is the function of the red blood cells? The function of the red blood cells is carry oxygen and carbon dioxide. What is the function of the white blood cells? The function of the white blood cells are to fight invaders. 3.Which blood type is the universal recipient, which can receive from every kind? Type AB the universal donor, which can donate to every kind? Type O 4. Capillaries are important because it is in the capillaries where oxygen and carbon dioxide are exchanged.

Third Six Weeks Test Review 5. Know the significance of the following words: artery (blood vessels that move blood away from the heart), vein(blood vessels that move toward the heart), pulmonary (the lungs), aorta (largest artery), and vena cava (vein from the lower area of the abdominal and legs). 6. Blood in the veins is high in carbon dioxide. (exception is in the pulmonary vein)

Third Six Weeks Test Review Excretory System (Ch. 15, Sec. 2) Excretion means getting rid of liquid waste. The main excretory organs in our bodies are the (1) kidneys, which are made up of millions of filtering units called (2) nephrons. They filter all of our blood daily to remove excess (3) water and waste, creating urine in the process.

Third Six Weeks Test Review Respiratory System (Ch. 15, Sec. 1) 1. Label and give the functions of the parts of the respiratory system as seen on page 446 or on your handout. (label all of the parts of the respiratory system not just the label parts)

Third Six Week Test Review 2. Fill in the blanks: We inhale. In the lungs, (1) oxygen is picked up by the (2) hemoglobin on the red blood cells. This happens in the (3) capillaries which surround the (4) alveoli, or air sacs. Oxygen is carried by the blood to the (5) body cells. Oxygen is combined with (6) glucose in the mitochondria of the cells to make ATP (7) energy. (8) Carbon dioxide is removed from the cells and carried to the (9) lungs. We (10) exhale, breathing out the CO 2.

Third Six Weeks Test Review 3.What was the main idea in the lab, “Lung Capacity?” The main of the “Lung Capacity” is to see how much air the lungs will hold. Review the graph on lung capacity lab. 4. What did the “Lung Model Lab” demonstrate? The “Lung Model Lab demonstrates how air pressure in our chest cavity causes us to breathe.

Third Six Weeks Test Review Digestive System & Nutrition (Ch. 16, Sec. 1 & 2) 1. What is the main reason that we need to digest our food? The main reason that we need to digest our food is to absorb nutrients. 2. Label and give the functions of the parts seen on page 483. Also, tell the path the food takes through our digestive system. Where does digestion begin? sequence of digestion mouth, esophagus, stomach, small intestines,

Third Six Weeks Test Review 3.Tell the difference between mechanical and chemical digestion. Also, where does each occur? Chemical digestion is a process that occurs when chemicals break down large food molecules into smaller ones that can be absorbed by the body. Mechanical digestion is process where food is broken down through chewing, mixing and churning. 4. When we eat food, our body will be able to convert the chemical energy in that food into thermal (heat) energy and kinetic (mechanical) energy for our bodies to use in daily life. 5. Be able to read a nutrition label.

Third Six Weeks Test Review 6. Other Vocabulary: Enzymes are (mostly) proteins that (1) speed up chemical reactions. (2) Chyme is a thin, watery fluid that leaves your stomach. Peristalsis is (3) waves of muscular contractions that moves food through the digestive system. 7. Which (lipids, carbohydrates, or proteins) are used first by the body to make energy?

Third Six Weeks Test Review 8. One of the most important monosaccharides (single sugars) that we studied is glucose, which has the chemical formula, C 6 H 12 O 6. 9.Remember the labs we did for this unit. What was the main idea of the “Intestine Digestion Lab?” The Intestine Digestion Lab shows how bile breaks down fats into smaller molecules and how acids are neutralized by bases(enzymes) What was the main idea the “Carbohydrate Lab?” The carbohydrates lab shows how larger carbohydrates can be broken down into single sugar (like glucose) by adding H 2 O.