Question 6
(6) The upper arm has two types of muscles namely triceps and biceps. These muscles work against each other to produce movement. When an athlete lifts weights as illustrated in the picture on the right, what happens to his upper arm muscles? [1 mark]
| Option | Biceps | Triceps |
| --- | --- | --- |
| A | Contract | Contract |
| B | Relax | Relax |
| C | Contract | Relax |
| D | Relax | Contract |
| Option | Biceps | Triceps |
| --- | --- | --- |
| A | Contract | Contract |
| B | Relax | Relax |
| C | Contract | Relax |
| D | Relax | Contract |