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MEDS 530A Final Exam Questions And Correct Answers
Muscle tone is ________. - ANSWER a state of sustained partial contraction
Which of the following muscles is used to form a smile - ANSWER Zygomaticus major
The sternocleidomastoid muscle inserts on the - ANSWER mastoid process of the temporal bone
Which of the following muscles does NOT act in plantar flexion? - ANSWER popliteus
The quadriceps femoris is composed of three "vastus" muscles and the - ANSWER rectus femoris
Tennis players frequently complain of pain in the arm (forearm) that swings the racquet. Which muscle is usually strained under these conditions? - ANSWER the brachioradialis
The _____ extends the great toe - ANSWER extensor hallucis longus
What type of muscle assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts? - ANSWER a synergist
The ______ helps to keep food between the grinding surfaces of the teeth during chewing - ANSWER buccinator
The _____ is a synergist of the latissimus dorsi; it extends, medially rotates, and adducts the humerus. - ANSWER teres major
The most powerful muscle in the body is the ________. - ANSWER quadriceps femoris
Which of the following is NOT a member of the hamstrings? - ANSWER gracilis
Paralysis of which of the muscled would make an individual unable to flex the knee? - ANSWER hamstring muscles
Which of the following muscles inserts to the posterior calcaneus via the calcaneal tendon? - ANSWER the gastrocnemius
In general, a muscle that crosses on the anterior side of a joint produces ________. - ANSWER flexion
A nursing infant develops a powerful sucking muscle that inserts to the muscle which adults also use for whistling. What is the name of this muscle? - ANSWER buccinator
At the grocery store a cute, little curly-haired child is standing behind you in line. You turn around for a moment and she sticks her tongue out at you. Which tongue muscle did she use? - ANSWER genioglossus
What is the name given to the muscle that provides the major force for producing a specific movement? - ANSWER an agonist (prime mover)
The abnormal protrusion of the small intestine through a weak point in the muscle of the abdominal wall is called a ________. - ANSWER hernia
Which of the following muscles is responsible for producing horizontal wrinkles in the forehead? - ANSWER frontal belly of the epicranius
Which of the following muscles would be responsible for inversion at the ankle joint? - ANSWER tibialis anterior
ACh
Troponin, a major protein in thin filaments, is a globular protein with three polypeptide subunits. Which of the following is NOT a function of the troponin? - ANSWER One subunit binds to potassium ions
Which of the following is true about smooth muscle? - ANSWER Some smooth muscle cells can actually divide to increase their numbers
Which of the following describes the cells of unitary smooth muscle? - ANSWER They exhibit spontaneous action potentials
If given the exact same amount of ATP which of the three fiber types could contract for the longest amount of time? - ANSWER slow oxidative fibers
A metabolic pathway that is anaerobic and involves the net production of two ATPs/glucose, and two molecules pyruvic acid. - ANSWER glycolysis
The capacity of muscle to shorten forcibly when adequately stimulated is called an ________, and sets muscles apart from others - ANSWER Contractility
The possible advantage to recruiting slow oxidative fibers to contract prior to fast oxidative and fast glycolytic fibers is _______ - ANSWER to allow for fine control with delicate contractile force with small stimulus
The contractile units of skeletal muscles are ________. - ANSWER myofibrils
What does tropomyosin do in skeletal muscles? ANSWER Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules
Which of the following is true? ANSWER Striated muscle cells are long and cylindrical
with many nuclei
Rigor mortis occurs because ________. ANSWER no ATP is available to release attached actin and myosin molecules
Although the anatomical parts of muscle work together to give it its characteristics, which of the following proteins listed below would be most associated with characteristics of excitability? - ANSWER elastic (thin) filaments
Creatine phosphate functions in the muscle cell by ______ - ANSWER storing energy that will be transferred to ADP to resynthesize ATP
The oxygen-binding protein found in muscle cells is ______ - ANSWER myoglobin
Isotonic contraction: the muscle _______ - ANSWER changes in length and moves the "load"
During development, embryonic cells will fuse to form muscle fibers. This will result in ________. - ANSWER multinucleated muscle fibers that can extend as long as 30 centimeters
The strongest muscle contractions are normally achieved by ________. - ANSWER increasing the stimulation up to the maximal stimulus
What is the most distinctive property of muscle tissue? - ANSWER The ability of the tissue to transform chemical energy into mechanical work to move the body
Of the following listed, which is the best description for why skeletal muscle stores glycogen? - ANSWER Skeletal muscle is a high consumer of energy
Curare is a toxic plant extract. Curare molecules have a chemical shape similar to the
