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.