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A&P Final Exam
Terms in this set (70)
Voluntary muscle tissue is...
An individual muscle cell
The plasma membrane of a skeletal muscle cell is called the...
Smooth muscle cells are...
Which type of muscle tissue responds the fastest to stimulations to contact?
Skeletal muscle tissue
Which of the following is NOT a function of the muscular system?
A sarcomere is...
The contractile unit between two Z discs
Which one of the following is composed of myosin protein?
Place these structures of the skeletl muscle in order from largest to smallest:
3. muscle fiber (cell)
3. Muscle fiber (cell)
The light and dark banding patterns send in striated muscle, like skeletal muscle, originate from...
Alternating light and dark bands
Why are calcium ions necessary for skeletal muscle contraction?
Calcium triggers the binding of myosin to actin
The mechanical force of contraction is generated by...
A sliding of thin filaments past thick ones
A neurotransmitter that stimulates skeletal muscle
The gap between the axon terminal of a motor neuron and the sarcolemma of a skeletal muscle cell is called the...
Neurotransmitters are released upon stimulation from a nerve impulse by the...
Axon terminals of the motor neuron
An elaborate and specialized network of membranes in skeletal muscle cells that function in calcium storage is the...
During skeletal muscle contraction, myosin heads attach to active sites of...
Which of the following can actually shorten during a muscle contraction?
A single, brief, jerky muscle contraction is termed...
Which of these events most occur first to trigger the skeletal muscle to generate an action potential and contract?
Acetylcholine (ACh) causes temporary permeability to sodium
A skeletal muscle twitch differs from a tetanic contraction in that...
The muscle twitch is a brief and "jerky" movement, while the tetanic contraction is prolonged and continous
Creatine phosphate (CP) functions within the muscle cells by...
Storing energy that will be transferred to ADP to re-synthesize ATP as needed.
Isometric contractions produce...
Anaerobic glycolysis occurs without...
Which of these pathways is the fastest way to regenerate ATP during muscle activity?
Direct phosphorylation of ADP by creatine phosphate
What is the opposite to abduction is?
Which of the following muscles closes the jaw?
Both masseter and temporalis
Which muscle is NOT involved in the movement of the hands and/or fingers?
Extensor digitorum longus
Which of the the following does NOT compress the abdoment?
A muscle is located on the ventra/anterior side of the body is of...
A nursing infant develops a powerful sucking muscle that adults also use for whistling or blowing a trumpet called the ...
What is the main function of the quadriceps femoris group?
A muscle group that works with and assists the action of a prime mover is a...
Which of the following muscles is NOT involved in dorsiflexion and/or plantar flexion of the foot?
Which one of the following is the action of the orbicularsis oris?
Closes, purses, and protrudes the lips
Paralysis of which of the following would make an individual unable to flex the hip?
Which one of the following muscles is involved in abduction of the arm at the shoulder joint?
What is the origin of the deltoid muscle?
Scapular spine and clavicle
While doing "jumping jacks" during an exercise clas, your arms and legs move laterally away from the midline of your body. This motion is called...
Which of the following muscles are antagonists?
Biceps brachii and triceps brachii
Which congentil muscle disease results from the degeneration and atrophy of muscles?
Which one of the following is NOT a criteria generally used in naming muscles?
Number of origins of the muscle
Cardiac and smooth muscles both have striations.
False. Cardiac and skeletal muscles both have striations.
All types of muscle have endomysium covering individual muscle cells.
Smooth muscles activity generates heat to help maintain body temperature.
False. Skeletal muscles activity generates heat to help maintain body temperature.
The striations seen in skeletal muscle are actually alternating A and I bands.
The sacroplasmic reticulum wraps like a sleeve around the myofibril and stores and releases calcium
Cardiac muscle fibers are relatively short, tapering cells within a single centrally located nucleus.
The neurotransmitter used by the nervous system to activate skeletal muscle cells is aetylcholine.
Thick filaments are made of a protein called actin.
Aerobic respiration requires the use of oxygen to generate ATP.
Oxygen debt promotes lactic acid accumulation on muscles from anaeobic cellular respiration.
A sustained partial contraction of skeletal muscle is called muscle tone.
An aponeurosis is a ropelike piece of muscle fascia that forms indirect connections to muscles of the leg.
A muscle twitch results when the muscle is stimulated so rapidly that no evidence of relaxation is seen.
The effect of the neurotransmitter on the muscle cell membrane is to temporarily modify its permeability of ions such as Na+ and K+.
When a muscle fiber contacts, the I bands diminish in size, the H zones disappear, and the A bands move closer together but do not diminish in size.
Biceps brachii, brachialis, and brachioradialis all cause arm flexion at the elbow joint.
The deltoid is a pime mover of arm adduction.
The deepest muscle of the abdominal wall is the transversus abdominis.
Dorsiflexion and plantar flexion are synergistic actions.
Plantar flexion at the ankle joint is accomplished by the tibialis anteior muscle.
The hamstring group inserts into the distal tibia.
Muscle development in babies occurs in a cephalic/caudual direction.
Supination and pronation refer to up and down movements of the foot at the ankle.
There is no possibility of damaging the spinal cord below the third lumbar vertebra.
Tissue found only in the heart; composed of branching cells and intercalated discs
Tissue that forms valves to regulate the passage of substances though internal body openings; activates arrector pili muscles which stand hairs on end; perform very slow, sometimes rhythmic, contractions
Voluntary muscle tissue; multinucleate; maintains posture, body position, stabilizes joints, and regulates body temperature
Muscles and glands are:
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