HBS CFA: Unit 1: Bones & Muscles

A short unit check. Enter your Student ID and answer each item. This is practice, not a grade.

1. 1. In anatomy, "proximal" means:

   AFarther from the trunkBToward the back of the bodyCCloser to the trunkDToward the head

2. 2. The heart and lungs are housed mainly in the:

   APelvic cavityBThoracic cavityCCranial cavityDAbdominal cavity

3. 3. Osteoblasts and osteoclasts have opposite jobs. Osteoblasts:

   AForm cartilage at a jointBBuild new bone tissueCBreak down bone tissueDMake blood cells

4. 4. In the sliding-filament model, muscle shortens when:

   AThe tendons shorten and pull the bonesBActin and myosin filaments themselves shrinkCMyosin heads pull actin filaments inwardDNew sarcomeres are added to the fiber

5. 5. An EMG sensor measures:

   AElectrical activity of the heartBElectrical activity of musclesCThe angle a joint moves throughDForce the muscle produces

6. 6. Early rehabilitation after a joint injury usually aims to:

   APush through pain to speed recoveryBLoad the joint with full weight right awayCGradually restore range of motion and strengthDRest the joint completely until pain is gone

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