Test Yourself About Muscles With Online Quiz

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  • 1/157 Questions

    What is the action of the rectus abdominis?

    • Compresses abdomen and flexes vertebral column
    • Expands abdomen and extends vertebral column 
    • Option 3
    • Option 4
    • Option 5
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About This Quiz

Do you know how many muscles are there in our body? What is the strongest muscle in the human body? Check out our online quiz to test yourself and learn interesting facts as you play.

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  • 2. 

    WHat is the action of the transversus abdominis?

    • Depress ribs

    • Compress abdomen 

    • Expand abdomen 

    • Evelate scapula 

    Correct Answer
    A. Compress abdomen 
    Explanation
    The action of the transversus abdominis is to compress the abdomen. This muscle is located deep within the abdomen and plays a crucial role in stabilizing the core and providing support to the spine. When the transversus abdominis contracts, it helps to flatten and tighten the abdominal area, which can be beneficial for activities that require core strength and stability, such as lifting heavy objects or maintaining good posture.

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  • 3. 

    Where does the pectoralis major originate?

    • Acromial extremity of clavicle 

    • Spines t7-t12

    • Clavicle, sternum, cartilage of ribs 2-6 

    • Supraspinous fossa of scapula 

    Correct Answer
    A. Clavicle, sternum, cartilage of ribs 2-6 
    Explanation
    The pectoralis major muscle originates from the clavicle, sternum, and cartilage of ribs 2-6.

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  • 4. 

    What is the action of the brachioradialis?

    • Extend forearm, fully supinate and pronate 

    • Extend forearm 

    • Flex forearm, partially supinate and pronate 

    • Laterally rotate forearm 

    Correct Answer
    A. Flex forearm, partially supinate and pronate 
    Explanation
    The brachioradialis is a muscle in the forearm that flexes the forearm, partially supinates and pronates it. It is responsible for movements such as bending the elbow and rotating the forearm to face the palm up or palm down positions.

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  • 5. 

    What innervates the vastus medialis?

    • Medial

    • Sciatic 

    • Femoral

    • Deep peroneal

    Correct Answer
    A. Femoral
    Explanation
    The correct answer is femoral because the vastus medialis muscle is innervated by the femoral nerve. The femoral nerve originates from the lumbar plexus and supplies motor innervation to the muscles of the anterior thigh, including the vastus medialis. It also provides sensory innervation to the skin of the anterior thigh and medial leg.

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  • 6. 

    What innervates the vastus intermedius?

    • Sciatic

    • Femoral

    • Tibial

    • Deep peroneal

    Correct Answer
    A. Femoral
    Explanation
    The correct answer is femoral because the vastus intermedius muscle is innervated by the femoral nerve. The femoral nerve is a major nerve of the lower limb that arises from the lumbar plexus and supplies motor innervation to the muscles of the anterior thigh, including the vastus intermedius.

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  • 7. 

    What is the action of external oblique? 

    • Together compress abdomen, singly laterally flex vertebral column 

    • Singly laterally flex vertebral column 

    Correct Answer
    A. Together compress abdomen, singly laterally flex vertebral column 
    Explanation
    The external oblique muscle is responsible for both compressing the abdomen and laterally flexing the vertebral column. When both sides of the muscle contract together, they help to compress the abdomen, providing support and stability to the core. When only one side contracts, it laterally flexes or bends the vertebral column to the same side. This action allows for movements such as side bending or twisting of the torso.

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  • 8. 

    Where does the deltoid originate?

    • Acromial extremity of clavicle, acromion, and spine of scapula 

    • Supraspinous fossa of scapula 

    • Inferior lateral border of scapula 

    • Supracond ridge 

    Correct Answer
    A. Acromial extremity of clavicle, acromion, and spine of scapula 
    Explanation
    The deltoid muscle originates from the acromial extremity of the clavicle, the acromion, and the spine of the scapula.

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  • 9. 

    What is the action of the deltoid?

    • Adducts and extends humerus 

    • Flexes the wrist 

    • Abducts, flexes, extends, medially, and laterally rotates the humerus 

    • Flexes and extends the forearm 

    Correct Answer
    A. Abducts, flexes, extends, medially, and laterally rotates the humerus 
    Explanation
    The deltoid is a muscle located in the shoulder region. It is responsible for multiple actions including abduction (moving the arm away from the body), flexion (bringing the arm forward), extension (moving the arm backwards), medial rotation (rotating the arm inward), and lateral rotation (rotating the arm outward). These actions allow for a wide range of movements in the shoulder joint.

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  • 10. 

    What innervates the deltoid?

    • Subscapular 

    • Lower subscapular 

    • Accessory 

    • Axillary 

    Correct Answer
    A. Axillary 
    Explanation
    The deltoid muscle is innervated by the axillary nerve. This nerve arises from the brachial plexus and provides motor innervation to the deltoid muscle, allowing for shoulder abduction and flexion. The other options listed (subscapular, lower subscapular, and accessory) do not innervate the deltoid muscle.

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  • 11. 

    What is the action of the levator scapulae 

    • Adducts scapula and rotates down 

    • Elevates scapula and rotates down 

    • Elevates the head

    • Cervical flexion 

    Correct Answer
    A. Elevates scapula and rotates down 
    Explanation
    The levator scapulae is a muscle located in the neck and upper back region. Its main action is to elevate the scapula, which means it helps to lift the shoulder blade towards the ear. Additionally, it also helps in rotating the scapula downwards. Therefore, the correct answer is "elevates scapula and rotates down".

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  • 12. 

    What is the pectoralis major innervated by?

    • Thoracodorsal 

    • Lower subscapular 

    • Axillary 

    • Medial/lateral pectoral

    Correct Answer
    A. Medial/lateral pectoral
    Explanation
    The pectoralis major is innervated by the medial and lateral pectoral nerves. These nerves arise from the brachial plexus and provide motor innervation to the pectoralis major muscle. The thoracodorsal nerve innervates the latissimus dorsi muscle, the lower subscapular nerve innervates the subscapularis muscle, and the axillary nerve innervates the deltoid and teres minor muscles. Therefore, the correct answer is medial/lateral pectoral.

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  • 13. 

    What is the action of latissimus dorsi?

    • Flexes and laterally rotates humerus 

    • Abducts and laterally rotates humerus 

    • Extends, adducts and medially rotates humerus 

    • Adducts and flexes humerus 

    Correct Answer
    A. Extends, adducts and medially rotates humerus 
    Explanation
    The latissimus dorsi muscle is responsible for extending, adducting, and medially rotating the humerus. This means that it helps to move the arm backward, bring it closer to the body, and rotate it inward.

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  • 14. 

    Where does the supraspinatus originate?

    • Supraspinous fossa of scapula 

    • Inferior angle of scapula 

    • Inferior lateral border of scapula 

    • Acromial extremity of clavicle 

    Correct Answer
    A. Supraspinous fossa of scapula 
    Explanation
    The supraspinatus muscle originates from the supraspinous fossa of the scapula. This is a shallow depression located on the posterior side of the scapula, above the spine of the scapula. The muscle then attaches to the greater tubercle of the humerus in the shoulder joint.

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  • 15. 

    What is the origin of the sternocleidomastoid?

    • Sternum and Clavicle 

    • Mastoid

    • Xiphoid

    • Iliac Crest 

    Correct Answer
    A. Sternum and Clavicle 
    Explanation
    The sternocleidomastoid muscle originates from the sternum (breastbone) and clavicle (collarbone). It is a large muscle located in the front of the neck that helps with various movements of the head and neck.

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  • 16. 

    What is the insertion of the sternocleidomastoid?

    • Central tendon 

    • Superior vertebral border of scapula 

    • Mastoid 

    • Xiphoid 

    Correct Answer
    A. Mastoid 
    Explanation
    The insertion of the sternocleidomastoid muscle is the mastoid process of the temporal bone. This muscle originates from the sternum and clavicle, and its insertion at the mastoid process allows it to rotate and flex the head and neck.

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  • 17. 

    What innervates the supraspinatous?

    • Axillary 

    • Suprascapular 

    • Phrenic

    • Radial 

    Correct Answer
    A. Suprascapular 
    Explanation
    The supraspinatus muscle is innervated by the suprascapular nerve. This nerve originates from the upper trunk of the brachial plexus and passes through the suprascapular notch to reach the supraspinatus muscle. It provides motor innervation to the supraspinatus, allowing it to contract and assist in shoulder abduction and stabilization. The axillary nerve innervates the deltoid and teres minor muscles, the phrenic nerve innervates the diaphragm, and the radial nerve innervates the extensor muscles of the forearm.

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  • 18. 

    Where does the teres minor originate?

    • Inferor angle of scapula 

    • Inferior lateral border of scapula 

    • Superior angle of scapula 

    • Bicip groove 

    Correct Answer
    A. Inferior lateral border of scapula 
    Explanation
    The teres minor muscle originates from the inferior lateral border of the scapula.

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  • 19. 

    What is the action of adductor longus?

    • Flex, adducts, laterally rotates femur

    • Abducts femur

    • Extend leg

    • Flex leg 

    Correct Answer
    A. Flex, adducts, laterally rotates femur
    Explanation
    The adductor longus is a muscle located in the inner thigh. Its main actions are flexion, adduction, and lateral rotation of the femur. Flexion refers to bending the leg at the hip joint, adduction refers to bringing the leg towards the midline of the body, and lateral rotation refers to rotating the leg outward. Therefore, the correct answer is flex, adducts, laterally rotates femur.

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  • 20. 

    What innervates the adductor brevis?

    • Femoral

    • Sciatic

    • Tibial

    • Obturator

    Correct Answer
    A. Obturator
    Explanation
    The adductor brevis is innervated by the obturator nerve. The obturator nerve is a major nerve of the lower limb that arises from the lumbar plexus and provides motor innervation to the adductor muscles of the thigh, including the adductor brevis. This nerve also supplies sensory innervation to the skin of the medial aspect of the thigh. Therefore, the correct answer is obturator.

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  • 21. 

    What innervates the vastus lateralis?

    • Tibial

    • Sciatic 

    • Femoral

    Correct Answer
    A. Femoral
    Explanation
    The vastus lateralis is innervated by the femoral nerve. The femoral nerve is a major nerve that originates from the lumbar plexus and supplies motor and sensory innervation to the muscles of the anterior thigh, including the vastus lateralis. It is responsible for the extension of the leg at the knee joint.

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  • 22. 

    What are the external intercostals innervated by? 

    • Accessory nerve 

    • Phrenic 

    • Dorsal scapular 

    • Intercostals 

    Correct Answer
    A. Intercostals 
    Explanation
    The external intercostals are innervated by the intercostal nerves. These nerves are located between the ribs and provide motor and sensory innervation to the muscles and skin of the intercostal spaces. The intercostal nerves originate from the spinal cord and run along the lower border of each rib. They are responsible for the contraction of the external intercostal muscles during inspiration, helping to elevate the ribs and expand the thoracic cavity.

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  • 23. 

    What innervates the bicep brachii?

    • Radial 

    • Median 

    • Musculocutaneous 

    • Ulnar

    Correct Answer
    A. Musculocutaneous 
    Explanation
    The correct answer is musculocutaneous. The musculocutaneous nerve is responsible for innervating the bicep brachii muscle. It originates from the brachial plexus and supplies motor innervation to the bicep brachii muscle, allowing it to contract and perform movements such as flexion at the elbow joint. The musculocutaneous nerve also provides sensory innervation to the skin on the lateral aspect of the forearm.

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  • 24. 

    What is the action of gluteus maximus?

    • Flex vertebrae

    • Flex, abducts femur

    • Abducts, medially rotates femur 

    • Extends, abducts, adducts, and laterally rotates femur

    Correct Answer
    A. Extends, abducts, adducts, and laterally rotates femur
    Explanation
    The gluteus maximus is a large muscle located in the buttocks. It is responsible for extending the femur, which means it helps to move the leg backwards. Additionally, it also abducts the femur, which means it moves the leg away from the midline of the body. It can also adduct the femur, which means it moves the leg towards the midline of the body. Lastly, the gluteus maximus laterally rotates the femur, which means it rotates the leg away from the midline of the body.

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  • 25. 

    What is the action of biceps brachii?

    • Flex humerus, flex and supinate forearm 

    • Extend the humerus 

    • Extend and prontate the forearm 

    • Extends forearm and humerus 

    Correct Answer
    A. Flex humerus, flex and supinate forearm 
    Explanation
    The action of the biceps brachii is to flex the humerus and flex and supinate the forearm. This means that it is responsible for bending the upper arm at the elbow joint and rotating the forearm so that the palm faces upward.

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  • 26. 

    Where does the deltoid insert?

    • Bicip groove 

    • Deltoid tuberosity of humerus 

    • Greater tubercle of humerus 

    • Tuberosity and coronoid process of ulna 

    Correct Answer
    A. Deltoid tuberosity of humerus 
    Explanation
    The deltoid muscle is a large, triangular muscle located on the upper arm. It inserts at the deltoid tuberosity of the humerus, which is a bony prominence on the lateral side of the humerus. This tuberosity provides a strong attachment point for the deltoid muscle, allowing it to exert force and participate in movements of the shoulder joint.

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  • 27. 

    Where does the latissumus dorsi originate?

    • Iliac crest 

    • Sternum, cartilage of ribs 2-6

    • Spines t7-t12, sacral crest, ilium

    • Scapula 

    Correct Answer
    A. Spines t7-t12, sacral crest, ilium
    Explanation
    The latissimus dorsi muscle originates from the spines of the 7th to 12th thoracic vertebrae, the sacral crest, and the ilium.

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  • 28. 

    What is the latissimus dorsi innervated by?

    • Accessory nerve

    • Axillary nerve

    • Phrenic nerve

    • Thoracodorsal nerve

    Correct Answer
    A. Thoracodorsal nerve
    Explanation
    The latissimus dorsi muscle is innervated by the thoracodorsal nerve. This nerve originates from the brachial plexus and supplies motor innervation to the latissimus dorsi muscle. The thoracodorsal nerve runs along the posterior wall of the axilla and travels through the latissimus dorsi muscle, providing the necessary nerve impulses for muscle contraction and movement.

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  • 29. 

    What is the action of the internal oblique?

    • Together compress abdomen, singly laterally flex vertebral column 

    • Singly compress abdomen, together flex vertebral column 

    Correct Answer
    A. Together compress abdomen, singly laterally flex vertebral column 
    Explanation
    The internal oblique muscle is responsible for compressing the abdomen when both sides contract simultaneously. When only one side contracts, it laterally flexes the vertebral column. This means that the correct answer is "together compress abdomen, singly laterally flex vertebral column".

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  • 30. 

    What is the internal oblique innervated by?

    • T8-T12, iliohypogastric, ilioinguinal 

    • T7-T12

    • Dorsal scapular 

    • Thoracodorsal 

    Correct Answer
    A. T8-T12, iliohypogastric, ilioinguinal 
    Explanation
    The internal oblique muscle is innervated by the T8-T12 spinal nerves, as well as the iliohypogastric and ilioinguinal nerves. These nerves provide the necessary motor and sensory input to the muscle, allowing it to contract and perform its functions. The T8-T12 spinal nerves originate from the thoracic region of the spinal cord and supply the muscles and skin of the abdominal wall. The iliohypogastric and ilioinguinal nerves also arise from the spinal cord and provide innervation to the lower abdomen and groin region.

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  • 31. 

    Where does the trapezius originate?

    • Spines t2-t5

    • Superior c4-c5

    • Occipital, spines c7-t12

    • Superior border of the rib below 

    Correct Answer
    A. Occipital, spines c7-t12
    Explanation
    The trapezius muscle originates from the occipital bone and the spinous processes of the seventh through twelfth thoracic vertebrae (C7-T12).

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  • 32. 

    Where does the rhomboid major originate?

    • Superior c4-c5 

    • Occipital

    • Sternum

    • Spines t2-t5

    Correct Answer
    A. Spines t2-t5
    Explanation
    The rhomboid major muscle originates from the spines of the second to fifth thoracic vertebrae (T2-T5).

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  • 33. 

    What is the action of brachialis?

    • Extend forearm 

    • Pronate forearm 

    • Flex forearm 

    • Supinate forearm 

    Correct Answer
    A. Flex forearm 
    Explanation
    The action of the brachialis muscle is to flex the forearm. This means that it is responsible for bending the forearm at the elbow joint, bringing the hand closer to the shoulder. The brachialis works in conjunction with other muscles, such as the biceps brachii, to perform this movement.

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  • 34. 

    What innervates the brachioradialis?

    • Median 

    • Ulnar 

    • Radial 

    • Deep radial 

    Correct Answer
    A. Radial 
    Explanation
    The brachioradialis muscle is innervated by the radial nerve. The radial nerve is responsible for supplying motor innervation to the muscles of the posterior compartment of the forearm, including the brachioradialis. It also provides sensory innervation to the posterior aspect of the forearm and hand. Therefore, the correct answer is radial.

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  • 35. 

    Where does the gluteus medius insert?

    • IT tract, gluteal tuberosity of femur

    • Less trochanter of femur

    • IT band to tibia

    • Greater trochanter of femur

    Correct Answer
    A. Greater trochanter of femur
    Explanation
    The gluteus medius muscle inserts into the greater trochanter of the femur. The greater trochanter is a bony prominence on the upper part of the femur, and it serves as the attachment site for various muscles, including the gluteus medius. This muscle plays an important role in stabilizing the pelvis during walking and other lower limb movements.

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  • 36. 

    Where does the adductor brevis insert?

    • Medial tibia

    • Linea aspera

    • Superior border patella 

    Correct Answer
    A. Linea aspera
    Explanation
    The adductor brevis muscle inserts on the linea aspera. The linea aspera is a ridge on the posterior surface of the femur. It serves as the attachment point for various muscles, including the adductor brevis. Therefore, the correct answer is linea aspera.

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  • 37. 

    What is the action of triceps brachii?

    • Extends forearm and humerus 

    • Flexes forearm and humerus 

    • Extends humerus and flexes forearm 

    • Flexes forearm and extends humerus 

    Correct Answer
    A. Extends forearm and humerus 
    Explanation
    The action of the triceps brachii is to extend the forearm and humerus. This muscle is located on the back of the upper arm and is responsible for straightening the arm at the elbow joint. When the triceps brachii contracts, it pulls on the forearm bone (ulna) and causes extension of the forearm. Additionally, it also assists in extending the upper arm at the shoulder joint by pulling on the humerus bone.

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  • 38. 

    What is the sternocleidomastoid innervated by?

    • Iliohypogastric, ilioinguinal, T8-T12 

    • Accessory, C2-C3

    • Intercostals 

    • Dorsal scapular 

    Correct Answer
    A. Accessory, C2-C3
    Explanation
    The sternocleidomastoid muscle is innervated by the accessory nerve (cranial nerve XI) and the cervical spinal nerves C2 and C3.

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  • 39. 

    Where do the external intercostals insert?

    • Superior vertebral border of scapula 

    • Central tendon 

    • Clavicle, acromion, scapula spine 

    • Superior border of rib below 

    Correct Answer
    A. Superior border of rib below 
    Explanation
    The external intercostals are muscles located between the ribs. They run obliquely downwards and forwards. They attach to the superior border of the rib below, which means that they insert onto the upper edge of the rib that is situated immediately below them. This attachment allows the external intercostals to elevate the rib cage during inspiration, aiding in the process of breathing.

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  • 40. 

    What is the action of the external intercostals?

    • Depresses ribs, decreases thorax lateral and anteroposterior

    • Elevates ribs, increases thorax lateral and anteroposterior 

    • Elevates scapula and rotates down 

    • Pulls central tendon increases thorax length 

    Correct Answer
    A. Elevates ribs, increases thorax lateral and anteroposterior 
    Explanation
    The action of the external intercostals is to elevate the ribs, which increases the lateral and anteroposterior dimensions of the thorax.

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  • 41. 

    What is the action of palmaris longus?

    • Flex wrist 

    • Extend wrist 

    • Laterally rotate wrist 

    • Medially rotate wrist 

    Correct Answer
    A. Flex wrist 
    Explanation
    The action of the palmaris longus is to flex the wrist. This means that it helps to bend the hand towards the palm side of the forearm.

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  • 42. 

    What is the action of flexor digitorum profundis?

    • Flexes middle phalanx of each finger

    • Extends, adducts hand at wrist joint

    • Flex distal phalanx of each finger 

    • Flex distal phalanx of thumb

    Correct Answer
    A. Flex distal phalanx of each finger 
    Explanation
    The action of the flexor digitorum profundis is to flex the distal phalanx of each finger.

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  • 43. 

    What innervates the rectus femoris?

    • Obturator

    • Sciatic

    • Femoral

    • Tibial

    Correct Answer
    A. Femoral
    Explanation
    The rectus femoris is innervated by the femoral nerve. This nerve is responsible for supplying motor and sensory innervation to the muscles in the anterior compartment of the thigh, including the rectus femoris. It originates from the lumbar plexus and travels through the pelvis and thigh to reach the muscle. Activation of the femoral nerve allows the rectus femoris to contract and participate in movements such as hip flexion and knee extension.

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  • 44. 

    Where does the external oblique insert?

    • Cartilage of ribs 5-7

    • Iliac crest, linea alba 

    • Cartilage of last 3 ribs 

    • Cartilage of last 6 ribs 

    Correct Answer
    A. Iliac crest, linea alba 
    Explanation
    The external oblique muscle inserts into the iliac crest and linea alba. The iliac crest is the upper curved border of the hip bone, while the linea alba is a fibrous band that runs vertically down the midline of the abdomen. The external oblique muscle is responsible for various movements of the trunk, including rotation and bending sideways. Its insertion at the iliac crest and linea alba allows it to exert force and contribute to these movements.

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  • 45. 

    What innervates the trapezius?

    • Phrenic nerve

    • Medial/lateral pectoral 

    • Accessory, C3-C4 

    • Intercostals 

    Correct Answer
    A. Accessory, C3-C4 
    Explanation
    The trapezius muscle is innervated by the accessory nerve, specifically the branches originating from the C3 and C4 spinal nerves. The accessory nerve controls the movement of the trapezius muscle, which is responsible for various movements of the shoulder and neck, such as shrugging the shoulders and rotating the head.

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  • 46. 

    Where does the rhomboid major insert?

    • Vertebral border of scapula below spine 

    • Inferior border of rib below 

    • Mastoid 

    • Xiphoid 

    Correct Answer
    A. Vertebral border of scapula below spine 
    Explanation
    The rhomboid major muscle inserts on the vertebral border of the scapula below the spine. This means that the muscle attaches to the scapula bone along its inner edge, specifically below the spine of the scapula.

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  • 47. 

    What is the action of the pectoralis major?

    • Extends, laterally rotates humerus 

    • Flex, medially rotates, and adducts the humerus 

    • Flexes and supinates the forearm 

    • Extends humerus and forearm 

    Correct Answer
    A. Flex, medially rotates, and adducts the humerus 
    Explanation
    The pectoralis major is a large muscle located in the chest. It is responsible for multiple actions including flexing, medially rotating, and adducting the humerus. Flexion refers to bending the arm at the shoulder joint, medially rotation involves rotating the arm towards the midline of the body, and adduction is the movement of bringing the arm towards the center of the body. Therefore, the correct answer is flex, medially rotates, and adducts the humerus.

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  • 48. 

    Where does the supraspinatus inserT?

    • Bicip groove

    • Greater tubercle of humerus 

    • Styloid process of radius 

    • Sacral crest 

    Correct Answer
    A. Greater tubercle of humerus 
    Explanation
    The supraspinatus inserts on the greater tubercle of the humerus. This is the correct answer because the supraspinatus is one of the four muscles that make up the rotator cuff in the shoulder. It originates from the supraspinous fossa of the scapula and runs laterally to insert on the greater tubercle of the humerus. This insertion point allows the supraspinatus to assist in abduction and stabilization of the shoulder joint.

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  • 49. 

    What is the action of flexor digitorum superficialis?

    • Flexes distal phalanx of thumb

    • Flex distal phalanx of each finger 

    • Flexes middle phalanx of each finger 

    • Option 4

    Correct Answer
    A. Flexes middle phalanx of each finger 
    Explanation
    The action of the flexor digitorum superficialis is to flex the middle phalanx of each finger.

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Quiz Review Timeline (Updated): Mar 22, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 18, 2021
    Quiz Created by
    Alfredhook3
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