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Muscular System
| Question | Answer |
|---|---|
| What are muscles? | An organ that contracts, becomes shorter, or expands, becomes longer, which allows the body to move. |
| How many muscles are int he human body? | More than 600 muscles. |
| What percent of body mass is muscle? | 35-40%. |
| What are the two groups of muscles? | Voluntary and involuntary. |
| What are voluntary muscles, and provide an example. | Muscles that you can control; arms, legs, hands, face. |
| What are involuntary muscles, and provide an example. | Muscles you can't control; muscles around the heart, intestines. |
| What are smooth muscles? | Involuntary muscles that contract slowly and move substances through the organs they surround; found in the walls of the stomach, intestine, uterus,... |
| What are cardiac muscles and what is their purpose? | Make up the walls of the heart; pump blood. |
| What are skeletal muscles? | Voluntary muscles that contract quickly and tire easily. |
| How are skeletal muscles attached to bones? | By tendons, which are thick bands that pull on the bones as the muscle contracts. |
| What do skeletal muscles look like under a microscope | Striated, or striped. |
| True of False; Skeletal muscles always push. | False. |
| How do skeletal muscles cause the body to move? | By working in pairs; one muscle contracts while the other muscle relaxes. |
| What is the result of the body creating thermal energy when muscles contract? | Produce heat and keep the body temperature constant. |
| What happens when a muscle contracts and uses chemical energy? | Glucose is used and muscles get tired and need to rest. |
Created by:
Sachi
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