let exam 3

the characteristic muscle stiffness associated with rigor mortis is due to the inability of myosin filaments to detach from active site on actin filaments. what molecules is essential for this detachment?

ATP

Tom was experiencing pain, numbness, and weakness after he lifted a heavy box. Which of the following is the most likely injury that occurred?

a herniated intervertebral disk

moving your arm lateral toward your body is

adduction

Gomphosis

are found only in the tooth sockets

muscles that surround the mouth and eyes are __ muscles

circular

Which bone is not part of the axial skeleton?

clavicle

the property of muscle tissue that allows an impulse to travel down the entire length of the cell membrane is __

conductivity

which of the following is the correct sequence, going from superficial to deep, for connective tissue found in skeletal muscle

epimysium, perimysium, endomysium

Both heads of the biceps femoris muscle __________.

extend the leg at the knee

inside a muscle, bundles of single muscle fibers form

fascicles

the soles muscle____ the foot at the ankle and is innervated by the __

flexes; tibial nerve

the most common degenerative joint disease in the elderly, often caused by wear and tear, is

osteoarthritis

shoulder joints and interphalangeal joints are classified as__joints

synovial

The fluid within Bursae functions to cushion structures in or around a joint. In Bursitis, excessive fluid accumulates and joint movements become painful. What is the name of this fluid within healthy bursae?

synovial fluid

someone who can wiggle his ears has good control of his___ muscles

temporoparietalis

Why do the disease tetanus and the normal sustained muscle contraction called tetanus share the same name?

they both eliminate the relaxation phase in the effected muscle fibers

Myosin molecules form what part of the sarcomere?

thick filament

this muscle extends the forearm at the elbow

triceps brachii

to what regulatory protein does calcium bind during the initiation of the contraction cycle in skeletal muscle fibers

troponin

Which muscle assists with smiling

zygomaticus major

considering that the likelihood of nerve damage due to intramuscular injections into bulky muscles with fewer nerves is greatly reduced, into which of the following muscles would you not want to receive an intramuscular injection

adductor longus

which of these body systems interacts extensively with the skeletal system

Muscular,endocrine, hematopoietic

the largest foramen in the skull is the

foramen magnum

the term diarthrosis refers to a join that is

freely mobile

the rotator cuff is a term used to describe the group of muscles and tendons that stabilize and reinforce the __

glenohumeral joint

which of the following movements best illustrates abduction?

spreading the fingers

the organ is

stationary end of the muscle

the suture that separates the parietal bones from the occipital bone is the

lambed suture

Movement of the forearm includes __________.

pronation and supination

which of the following group of muscles make up the quadriceps

rectus femoris, vastus lateralis, vastus medialis, vastus intermedius

release of cross bridges and a decline in muscle tension characterize the __ period of a twitch

relaxation

Which bones articulate with the zygomatic bone

Frontal, temporal, and maxilla

The area in the center of the A band that contains no thin filaments is the

H band

in an inguinal hernia, abdominal contents protrude though an enlarged inguinal canal. which of the following muscles is not superficial to the inguinal canal?

latissimus dorsi

what is the function of the cruciate ligaments in the knee joint

limit the movement of the femur on the tibia

the most common athletic knee injury produces damage to the

medial meniscus

The key actions of the pectoralis major muscle are __________.

medial rotation and adduction

which of the following stores calcium ions for contraction of skeletal muscle fibers

sarcomere

Suzy is on the swim team and her specialty is butterfly. she wants to improve her stroke by building up her lastissimus dorsi. interestingly, she read that she also needs to build up the synergist muscle, the trees major because it

the terms major is considered a synergist because it does all of the above.