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lab practical 4
| Question | Answer |
|---|---|
| Epicranuis ( frontalis ) | action : elevates the eyebrows |
| orbicularis oculi | action: closes the eye ( squinting blinking ) |
| orbicularis oris | action: close the mouth |
| zygomaticus major | origin : zygomatic bone insertion: superclateral skin of the mouth action: elevates and retracts the corner of the mouth (smiling) |
| temoparlis | origin : temporal bone insertion : coronoid process of the mandible action elevates and retracts the mandible |
| Masseter | origin zygomatic arch insertion: ramus and angle of the mandible action: elevates and protudes the mandible |
| platysma | (superficial layer) action: depresses the mandible. pulls corners of the mouth inferiorly and laterally. |
| superior rectus | action: elevates the eyeball ( looking up to the ceiling) |
| inferior rectus | action: depresses eye ball ( looking down to the floor) |
| lateral rectus | action abducts the eyeball ( side eye) |
| medial rectus | action: adducts the eyeball |
| sternocleidomastoid | origin: manubrium of the sternum and the medial clavicle insertion: mastoid process of the temporal bone bilateral action: flexion of the neck unilateral action : contralateral rotation of the head ipsilateral flexion of the neck |
| splenius capitas | bilateral action: extension of the neck unilateral action : ipsilateral rotation of the head ipsilateral flexion of the neck |
| rectus abdominis | origin: public crest of the coxal bone insertion : Xiphoid process of the sternum and the costal cartilage of ribs 5-7 action: flexion of the trunk |
| external oblique | bilateral action: flexion of trunk unilateral action: contralateral rotation of the trunk and ipsilateral flexion of the trunk |
| internal oblique | bilateral action: flexion of trunk unilateral action : ipsilateral rotation of the trunk and ipsilateral flexion of the trunk |
| transverse abdominis | action: compression of the abdominal cavity |
| Why the surface of motor end plate of skeletal muscle are NOT smooth? | fold increase surface area |
| In which type of muscles actin and myosin are NOT arranged in myofibrils? | smooth muscle |
| If you are looking to your left, which muscle is responsible for getting your right eye into position? | medial rectus |
| What are the two intercellular junctions in INTERCALATED DISCS? | gap junction desmosomes |
| What type of muscle have striations and multi nuclei when viewed under a microscope | skeletal muscle |
| Which muscles relax when you turn your head to the right? | splenius capitas, sternocleidomastoid |
| What type of muscle does NOT have striations when viewed under a microscope | smooth muscle |
| name and antagonist of the brachi | triceps brachi |
| what is the function of the orbicularis oculi | close the eye, wink, blink squint |
| name an antagonist of the pectoralis major | latissimus dorsi |
| what is the function of the lacrimal gland | tear produntion |
| when the superior rectus is contracted what is this person doing | looking up |
| what is a synergist to the bicep | brachialis |
| what is a person doing when the zygomatic major is contracted | smiling |
| a synergist to the temporalis is | masseter |
| The portion of a muscle between the two tendons is the ________ of the muscle. | belly |
| What is the insertion of the pectoralis minor? | coracoid process |
| what is the origin of the deltoid | clavicle, scapula |
Created by:
Rhonjoh2979