Question

MUSCULAR SYSTEM Skeletal muscles allow our bodies to bend, walk, sit, chew and talk. Humans have more than 600 muscles in their bodies. Muscles are named in various ways: by the action they perform (extensor, flexor): by their size (maximus, minimus), or length (brevis, longus); by their shape (deltoid, trapezius); for their origin(s) or insertion(s) (sternocleidomastoid), or by the number of origins or insertions (triceps, biceps). In addition, they can be named for their location (abdominis, brachii) or the bones they overlay (frontalis, tibialis). Materials Muscle models, muscle fiber model, textbook, three slides (cardiac, smooth, skeletal muscle). Procedure 5.1 Locate the following muscles on the models. Complete the lab report. Torso and upper extremity: • Trapezius • Pectoralis major • Deltoid • Biceps brachii • Triceps brachii • External obliques • Rectus abdominis • Latissimus dorsi Lower extremitys • Quadriceps femoris • Biceps femoris • Gastrocnemius • Tibialis anterior • Sartorius Gluteus maximus Head and neck: • Orbicularis oris • Orbicularis oculi CHAPTER 5: MUSCULAR SYSTEM

Answer 1

MUSCLE SYSTEM LAB REPORT :

1. External obliques
2. Sartorius
3. Tibialis anterior
4. Orbicularis oculi
5. Orbicularis oris
6. Deltoid
7. Pectoralis major
8. Biceps brachii
9. Rectus abdominis
10. Quadriceps femoris
11. Trapezius
12. Biceps femoris
13. Gastrocnemius
14. Latissimus dorsi
15. Triceps brachii
16. Gluteus maximus.

SKELETAL MUSCLE FIBRE​​​​​​​

1. Axon of motor neuron
2. Neuromuscular junction
3. Axon terminal
4. Sarcolemma
5. Sarcomere
6. Z -lines
7. Nucleus of muscle fiber