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Science The Body
Quiz (January, Friday 13th)
| Question | Answer |
|---|---|
| What three things are carried throughout the body by the cardiovascular system? | Need substances,waste products,disease fighting cells. |
| Each time the heart beats,what does it do to blood? | Each time theheart beats,it pushes blood through the blood vessels of the cardiovascular system. |
| A flap of tissue that prevents blood from flowing backward is a(n) | Valve. |
| The group of cells that adjusts the speed of the heart beat is called the | Pacemaker. |
| When blood flows through the heart,what force pushes the blood out of the heart and into the artieries? | The contraction of the ventricles. |
| Name the three kinds of blood vessels | Arteries,capillaries,and veins. |
| The largest artery in the body is called the | Aorta. |
| Arteries carry blood away from the | Heart. |
| Is the following true or false: The coronary arteries provicde the stomach with its blood supply. | False. |
| True or false? Arteries control the amount of blood that different organs receieve. | True. |
| What important thing happens in the capillaries? | Matericals are exchanged between the blood and the body's cell. |
| One process in which materials are exchanged between the blood and the body cells is | Diffusion. |
| What job do veins carry out? | Veins carry blood back to the heart. |
| True or false? The walls of veins are generally much thinner than those of the arteries | True. |
| What is blood pressure? | The pressure that blood exerts against the walls of blood vessels. |
| As blood moves away from the heart,does the blood pressure increase or decrease? | Decrease. |
| Instrument that measures blood pressure | Sphygmomanometer. |
| Name for liquid part of blood | Plasma. |
| What is plasma mostly made up of? | Water (90%) |
| Three kinds of materials that are carried in plasma | Nutrients,chemical messengers and wastes. |
| What job do red blood cells preform in the body? | They pick up oxygen in the lungs and carry it to cells in the body. |
| What is hemoglobin,and where is it found? | An iron-containing protein that binds chemically to oxygen molecules.It is found in red blood cells. |
| What is the job of white blood cells? | They fight diseases. |
| Lymphatic System- | A network of veinlike vessels that return fluid to the bloodstream. |