| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
large intestine |
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stomach |
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mouth |
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small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Tough fibrous cords of connective tissue that connect muscles to the skeleton are called:
vertebra |
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ligaments |
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cartilage |
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tendons |
Tough fibrous cords of connective tissue called tendons connect muscles to the skeleton while another type of connective tissue called ligaments connect bones to other bones at joints (elbow, knee, fingers, spinal column).
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
conduction |
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radiation |
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convection |
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reflection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
Which of these is not a component of blood?
white blood cells |
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plasma |
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marrow |
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red blood cells |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
Which of the following substances gives up positively charged hydrogen ions (H+) when dissolved in water?
acid |
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alkaline |
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solution |
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base |
An acid is a substance that gives up positively charged hydrogen ions (H+) when dissolved in water. A base (alkaline) gives up negatively charged hydroxide ions (OH-) when dissolved in water. pH is a scale that measures of how basic or acidic a solution is. Numbered from 0 to 14, solutions with a pH of 7 are neutral, less than 7 are acidic, more than 7 are alkaline.