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Unit 3 Chapter 10
The Muscular System
| Question | Answer |
|---|---|
| Which are functions of skeletal muscle? Vitamin D synthesis Heat production Movement Joint stability | Heat production Movement Joint stability |
| Which term refers to the loose connective tissue layer that surrounds each individual muscle cell? Multiple choice question. Fascia Perimysium Epimysium Endomysium | Endomysium |
| Tendons attach what structures together? | Bones to muscles |
| In flexing the elbow, the prime mover is the Blank______. | brachialis |
| Innervation of a muscle refers to its what? | Nerve supply |
| Skeletal muscle contraction helps produce body heat. True False | True ;This statement is true. Muscle contraction releases heat which contributes to our body temperature. |
| endomysium: | A loose connective tissue layer around each individual muscle cell |
| What does the term "brevis" mean in the name of a muscle? | short |
| Which term refers to a muscle that produces most of the force during a particular joint action? | Agonist aka prime mover |
| Knowing the innervation to each muscle enables clinicians to diagnose which of the following? Broken bones Osteoarthritis Nerve, spinal cord, and brain stem injuries Damage to blood vessels serving muscles | Nerve, spinal cord, and brain stem injuries |
| Contraction of the left sternocleidomastoid tilts the head toward the right. What type of movement is this? | Contralateral |
| ___________ head movements are toward the same side as the muscle. For example, contract of the right scalene muscles causes the head to tilt toward the right shoulder. | Ipsilateral |
| ___________ movements involve both sides equally. For example, simultaneous contraction of both the right and left sternocleidomastoids draws the head straight forward and down. | Bilateral |
| What are the functions of skeletal muscle? Formation of new blood cells Control of body openings and passages Heat production Blood sugar regulation | Control of body openings and passages Heat production Blood sugar regulation |
| What does the term "depressor" refer to in the name depressor labii inferioris? | The action of the muscle |
| Which muscle forms a dome between the thoracic and abdominal cavities? | Diaphragm |
| What is the action of the zygomaticus major? | Draws the angle of the mouth upward and laterally |
| Which are muscles of the anterior abdominal wall? . Select all that apply Rectus abdominis External abdominal oblique Internal abdominal oblique Latissimus dorsi Transverse abdominal Diaphragm | Rectus abdominis External abdominal oblique Internal abdominal oblique Transverse abdominal |
| Contraction of the left scalene muscles tilts the head toward the left shoulder. What type of movement is this? | Ipsilateral |
| Together the iliocostalis, the longissimus, and the spinalis form a muscle called the ________________ spinae. | Erector |
| Which muscle is the prime mover of inspiration? Multiple choice question. External intercostals Internal intercostals Diaphragm Pectoralis major | Diaphragm |
| The perineum is bordered by which of the following bony landmarks? Select all that apply: Ischial tuberosities Coccyx Occipital protuberance Pubic symphysis Zygomatic arch | Ischial tuberosities Coccyx Pubic symphysis |
| The zygomatic bone and the superolateral angle of the mouth are the skeletal attachments for which muscle? | Zygomaticus major |
| Which neck muscle has an attachment to the external occipital protuberance? | Trapezius |
| Which muscle is the deepest layer of the abdominal wall muscles? | Transverse abdominal muscle |
| The deltoid muscle has multiple actions. Indicate four of its actions from the list below. Adducts arm Elevates shoulder Abducts arm Retracts arm Medially rotates arm Flexes arm Laterally rotates arm | Abducts arm Medially rotates arm Flexes arm Laterally rotates arm |
| Contraction of the right sternocleidomastoid turns the head toward the left. What type of movement is this? | Contralateral |
| Which muscle do you contract in order to straighten your back after bending at the waist? | Erector spinae |
| The muscle that is a three-headed muscle on the posterior side of the humerus is called the ______________ brachii. | triceps |
| Which term refers to the diamond-shaped area between the thighs that is bordered by the pubic symphysis, the coccyx, and the ischial tuberosities? | Perineum |
| The muscle that extends the wrist, metacarpophalangeal, and interphalangeal joints is the extensor _____________ | Digitorum |
| Which muscle stabilizes the scapula during arm movements? | Trapezius |
| Muscles in the thenar group act on which of the following? Little finger Thumb Elbow Wrist | Thumb |
| What are the actions of the anterior fibers of the deltoid? | Flex and medially rotate the arm |
| Contraction of the right scalene muscles tilts the head toward the right shoulder. What type of movement is this? | Ipsilateral |
| Which is a three-headed muscle on the posterior side of the humerus? | Triceps brachii |
| What is the action of the quadriceps femoris? | Extend the knee |
| Where are the thenar group of muscles located? | At the base of the thumb |
| Where is the quadriceps femoris located? | Anterior thigh |
| Choose all that are actions of the gastrocnemius? Flexes knee Extends knee Dorsiflexes foot Plantar flexes foot | Flexes knee Plantar flexes foot |
| The muscle that extends the wrist, metacarpophalangeal, and interphalangeal joints is the extensor _____________ | Digitorum |
| Considering the name of the flexor hallucis brevis, what is its action? | Flexes big toe |
| Which group of hand muscles is concerned with moving the thumb? | Thenar group |
| Which is a prominent scapular muscle that can move the arm in many different ways? Multiple choice question. Temporalis Brachialis Deltoid Platysma | Deltoid |
| Which is an action of the gastrocnemius? Multiple choice question. Eversion of the foot Dorsiflexion Inversion of the foot Plantar flexion | Plantar flexion |
| Which muscle adducts toes III-V? Plantar interosseous muscle Flexor hallucis brevis muscle Adductor hallucis muscle Dorsal interosseous muscles | Plantar interosseous muscle |
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