Post lab question 1) A prime mover (agonist)__. A) is primarily responsible for
ID: 300920 • Letter: P
Question
Post lab question 1) A prime mover (agonist)__. A) is primarily responsible for a movement B) opposes or reverses a movement C) aids the action of the muscle primarily responsible for the movement D) immobilizes the origin of the prime mover 2) Muscles are named based on all the criteria below except__. A) action of the muscle C) number of origins B) direction of muscle fibers D) color of the muscle 3) This muscle is used in smiling A) depressor anguli oris Cl orbicularis oris B) levator labii superioris D) zygomaticus 4) This muscle closes the eyes, allowing you to wink or blink. A) orbicularis oris C) frontal belly of the epicranius B) orbicularis ocui D) cormugator supercili 5) This muscle compresses the cheek when you whistle A) levator labii superioris Cl masseter B) buccinator D) depressor labii inferioris 6) Located over the mandibular ramus, this muscle closes the jaw A) buccinators Cl masseter B) epicranius, frontal belly D) risorius 7) When both muscles of this pair are contracted simultaneously, they flex the neck forward A) platysma C) sternocleidomastoid B) semispinalis D) trapezius 8) This large, fan-shaped muscle of the upper chest is the prime mover of arm flexion A) deltoid C) pectoralis major B) external oblique D) serratus anterior ? 9) This powerful muscle is the prime mover of arm extension A) latissimus dorsi C) supraspinatus B) rhomboids Dl teres minor 10) This forearm muscle is a powerful wrist flexor. A) flexor carpi radialis C) palmaris longus B) extensor digitorum D) pronator teres 11) This deep muscle flexes the trunk on the thigh A) adductor longuS C) iliopsoas B) erector spinae D) splenius group 12) Commonly referred to as the A) hamstrings C) quadriceps femoris this muscle group on the posterior thigh extends the hip B) gluteus medius Dl tensor fasciae lataeExplanation / Answer
1. primer mover (agonist) is responsible primarily for the movement.
2.muscle are named based on all the criteria except color of the muscle.
3. D. zygomaticus muscles works in association with risorius muscle by lifting corners of mouth which helps in smiling.
4. B. orbicularis oculi control relexes of blinking in which eyes open whereas levator palbrae involves in closing of eye.
5. B . BUCCINATOR muscles compresses the cheek when we whistle . located in cheeks of face. hold the cheek close to teeth.
6.masseter involved in chewing of solid food it is type of facial jaw. shape is like a parallelogram and connected to lower jaw and cheek bone.
7, C sternocleidomastoid. two headed neck muscle,. extends from thorax to the base of skull behind the ear. when one side contracts face move towards the opposite side and when both muscles contract head move bent towards the chest.
8. pectoralis major----located at the chest of human body. flexion of humerus, movement of shoulder joint, keep arm attached to the trunk of body, rotation of humerus medially(arms -wrestling), adducts the humerus(flapping of arms)
9. lattisimus dorsi present behind the arm. largest muscle in the upper body.
10. flexor carpi radialis located in the anterior forearm. thin muscle which arises in the epicondyle which allows to flex and abduct the hand
11. iliopsoas(anterior hip muscle or inner hip muscle. involved in walking, running and standing.
12. hamstrings these contains biceps, femoris, semi membranous and semitendonous muscles.these are involved in straightening of thigh at the hip.