A&P Test 3

Transverse Tubule

A series of tubules that are invagination of the muscle cell membrane and transport action potetial is call what?

Nerve

A stimulus is started by the _______cell

Twitch

A type of contraction represented by a single stimulus/ contraction/ relaxation sequence is termed?

Myosin

Actin the can bind with_______

Flexing your elbow

An example of a third class lever is what?

Tropomyosin changes positions

Binding sites on actin become available when?

Acts as an energy reserve in muscle tissue

CP is what?

troponin

Ca+ binds to_______

rectus

Muscle whose fibers run parellel to the sagital plane are termed?

T-tubule

Sodium travels down the_______

exocytosis

Synaptic vesicles in the motor neuron containing neurotransmitters are released by this method

transverse tubule

The invagination of the sarcolema through the muscle fiber is called what?

Myosin

The thick filament contains?

Z line

The thin filaments are attatched at the end of the sarcomere to which of the following?

Spinning filament

What is the name of the theory that explains muscle contractions?

ATP

______ breaks the cross bridge.

Tropomyosin

______ gets rotated to uncover the binding sites on actin

Sodium

________ Enters the cell and travels down the t tubule

Synaptic Cleft

Each skeletal fiber is controlled by a neuron at a single junction, The space in that junction is called what?

Perimysium

Nerves and blood vessels that service the muscle fibers are located in the connective layers that surrounds the fasciles. What is that layer called?

b

During activities requiring aerobic endurance a. Oxygen Debts are common b. Most of the muscle's energy is produced in the mitochondria c. fatigue occurs in a few minutes d. oxygen is not required

CA++

Terinal cisternae release ______ into the muscle cell

plasticity

The ability of a smooth muscle cell function over a wide range of lengths producing the same tension level is termed what?

Zone of overlap

The action of a muscle contraction occurs in the sarcomere at which location?

Sarcolemma

The cell membrane of a skeletal muscle is called the?

Tendon

The continuation of the three layers of collagen fibers that seperate the muscle layers and are connected to the periosteum is called the what?

Epimysium

The dense layer of collagen fibers that surround an entire skeletal muscle is the?

Sarcomere

The functional unit of the skeletal muscle is the

motor end plate

The neurotransmitter binds to the_______

ACH

The neurotransmitter_______is realeased

Calcium

The sarcoplasmic reticulum stores what?

Concentric

The type of muscle contraction in which the fibers produce increased tension and shortens is termed?

D

Whichof the following is true requarding the muscles of the head and neck functions? a. Nonverbal communication b. Controling the eyes c. controlling the mouth d all of the above

wave summation

if a second stimulus arrives before the relaxation phase has ended, a second , more powerful contraction can occur. this is called?

Resistance fulcrum force

A first class lever is organized how?

fixator

A muscle that stabilizes the wrist during forearm flexion would be demonstrating the role of which term?

Upper arm

A muscle with the name Brachii would have an attachment site in which area?

cervicle spine

A muscle with the name cervicis would have an attachment site in what area?

Anaerobic respiration

At maximum exersion, the muscles generate most of its ATP by which process?

Doubling over in flexion

If you were hit in the rectus abdominis muscle, what would your body position change to?

calcium ions

In response to action potentials arriving from the transverse tubules, sarcoplasmic reticulum releases what?

Thick filaments

In the sarcomere what fibers make up the h-zone?

both thick and thin

In the sarcomere, what fibers make up the zone of overlap?

Muscle contraction, Muscle relaxation

Interaction between the actin and myosin filaments of the sarcomere are responsible for?

Muscle contraction would not occur

What would be the result of a drug that blocks the acetylcholine receptors?

A

Which is true about fast fiber. a. white- do not contain myoglobin b. aerobic c. small diameter d. slow fatigue

Tropomyosin rotates out of the way

When calcium ions bind to troponin,

Essentric

When flexing the bicep muscle, while the muscle is lengthening, this type of contraction is termed what?

obicularis oris

When putting on lipstick, what muscle would be good to contract.

Sodium

Which ion is outside the muscle cell that starts the action potential down the T tubules?

raising up on your toes

Which is a example of a second class lever?

Rectus Femoris

Which is a good example of a bipennate muscle?

e

Which is not a characteristic of cardiac muscle? a. automaticity-pacemaker b. responds to nervous system to quicken pace or slow c. contractions last longer than skeletal d no wave summation e.all are true

All are correct

Which is not a function of skeletal muscles? Produce Movement Maintain Posture Maintain Body temperature Support soft tissues All are correct

B.

Which is not true about slow fibers? a. Red- contains myoglobin b.anaerobic c. fatigues slow d. small diameter

d

Which is of the following is false? a. cardiac muscle contractions cannot be summated b. Skeletal muscle contractions may be summated c. Skeletal muscle control is neural d. Cardiac muscle control is neural e. cardiocytes are interconnected through intercalated discs

c

Which of the following is incorrect? a.The contractraction of skeletal muscles pull on tendons and move bones. b.Skeletal muscles are responsible for controlling the openings of the digestive and urinary tracts. c. Skeletal Muscles are responsible for moving urine the urinary system d. skeletal muscles support the weight of some internal organs. e. skeletal muscle contraction helps maintain body temperature.

e

Which of the following is not a cause of muscle fatigue? a. Depletion of metabolic reserves b. damage to the sarcolemma c. decline in pH within the muscle fiber d. increased lactic acid titer e. all are causes

A

Which of the following is not a characteristic of smooth muscle? A.Smooth muscle connective tissue forms tendons B. neurons that innervate smooth muscle are under involuntary control c. smooth muscle is uninucleated d. smooth muscles do not contain sarcomeres

d

Which of the following is not one of the forms of fasicle organization? a. parallel b. convergent c. divergent d. pinnate e. circular

D

Which of the following is not self antagonistic? a. pectoralis major b. trapezius c. deltoid d. Flexor digitorum superficialis

C

Which of the following motor units would produce the greatest tension? a. a motor unit of the eye b. a motor unit of the intrinsic hand c. a motor unit of the chest

E

Which of the following muscles compress the abdominal cavity? a. rectus abdominis b. transverse abdominis c. diaphram d. external obligue e. all but c

E

Which of the following situations would result in the increase oxygen utilization by muscles? a. Increased heat production b. increased conversion of pyruvic acid to ATP c. increased muscle contraction d. Increases aerobic respiration e. All of the above

E

Which of the following terms would not be a muscle naming for size? a. longus b. magnus c.brevis d.minimus e. All are size names