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7th Science Part 5
Malia Faith Nelson-A Beka Book- Chapter 3- Your Wonderful Body
| Question | Answer |
|---|---|
| Muscular system | Responsible for producing the movements of your body |
| About ___ of your body weight is ______. | Half, muscle |
| Skeletal muscles | Muscles that you directly control with a conscious mind |
| Tendons | Tough, cordlike things that attach skeletal muscles to the bones of the skeletal system |
| Muscles are like ropes they can ____, but they never ____. | pull, push |
| Origin | Anchors one side of a skeletal muscle |
| Insertion | Attaches the other side of the skeletal muscle. |
| The __________ is always pulled ______ the origin. | Insertion, organ |
| Involuntary muscles | Do their work whether you think about them or not; they are vital to your body |
| Nervous system | Coordinates the activities of your body |
| What are the two major divisions of your brain? | Central nervous system and peripheral nervous system |
| Central nervous system | The brain and the spinal cord |
| Peripheral nervous system | Composed of nerves and nerve tissues called ganglia |
| Nerves | Bundles of fibers that connect the central nerbous system with the rest of the body |
| Nerves transmit information through your body as electrochemical messages called ________. | Impulses |
| ________ travel to and from the central nervous system allowing the _____ and ______ ____ to control all your other body systems. | Impulses, brain, spinal cord |
| Brain | Chief organ of the nervous system and consists of the cerebrum, the cerebellum, and the brain stem. |
| Cerebrum | Largest part of the brain and controls conscious though and reason |
| The cerebrum is divided into two halves or ___________. | Hemispheres |
| Cerebellum | Responsible for balance and skeletal muscle coordination. Coordinates activities like walking writing speaking and riding a bike. |
| Brain stem | Connects the rest of the brain to spinal cord |
| Spinal cord | Controls simple reflexes and transmits impulses from the brain to the peripheral nervous system |
| Sensory nerve fivers | Transmits information to the brain and the spinal cord |
| Motor nerve fibers | transmit messages form the central nervous system to the muscles and other organs |
| Sensory receptors | Special nerve endings that detect conditions around you. |
Created by:
nelsonclan
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