A&P Chapter 10 & 11 HW

Which of these statements about skeletal muscles is FALSE? They store nutrient reserves. They support soft tissues. They pull on tendons. Their fibers branch.

The cross bridge cycle starts when _________.

steps of cross bridge cycle

Which of the following statements is true concerning motor units? -Movement of the eyeball requires fewer muscle fibers with less tension being produced. -A motor unit consists of all the muscle fibers it controls as well as the area of the spinal cord where it originates. -Lesser tension is required in lifting a dumbbell than in lifting a cup of coffee. -An increased number of motor neurons is needed in precise movements such as lifting a cup of coffee than in lifting a dumbbell. -A small number of muscle fibers with increased tension is needed in large, gross movements.

Which of the following is a way that muscle fibers get energy needed for contraction? -Because energy demands are low in a resting muscle, a resting muscle is able to meet its ATP requirement through glycolysis. -When a muscle is contracting during peak activity, it quickly uses up stored creatine phosphate which was produced during moderate exercise. -During moderate exercise, such as jogging on the treadmill, pyruvate and hydrogen ions accumulate causing muscle fatigue. -Aerobic exercise is beneficial to a muscle because it increases the muscle's ability to acquire greater amounts of glucose from the blood for ATP production. -During peak activity levels, glycolysis is the only pathway by which ATP can be produced to supply energy to the muscle.

At each end of the muscle, the collagen fibers of the epimysium, perimysium, and endomysium, come together to form a ________.

The terminal cisternae that form a triad along with a T tubule are part of what organelle?

Interactions between actin and myosin filaments of the sarcomere are responsible for

The advantage of having many nuclei in a skeletal muscle fiber is the ability to

Which of the following best describes the term Z line?

At rest, the tropomyosin molecule is held in place by

The region of the sarcomere that always contains thin filaments is the

When a skeletal muscle fiber contracts, the

The most important factor in decreasing the intracellular concentration of calcium ion after contraction is

In rigor mortis

Which of the following become connected by myosin cross-bridges during muscle contraction?

A single contraction-relaxation cycle in a muscle fiber produces a(n)

A muscle producing its maximum tension for a prolonged period is in __________.

A weight-lifter strains to lift a heavy weight and there is no movement of the person's arms holding on to the weight. This type of contraction is called a(n) ________ contraction.

You try to pick up an object and discover that it is much heavier than you expected. Which process must occur in the muscle to increase tension so you can pick up the object?

Which of the following allows muscles to return to their original shape during relaxation?

During anaerobic glycolysis

The type of muscle fiber that is most resistant to fatigue is the ________ fiber.

fast fibers

Which of the following is true about the difference between cardiac muscle cells and skeletal muscle cells?

To allow for flexion, the __________ unlocks the knee joint.

The prime mover of hip extension is the __________.

The tensor fascia latae is involved in hip __________.

The action that moves the scapula towards the head is called __________.

Which movement results after the contraction of the serratus anterior muscle?

Which movement is NOT associated with the scapula?

The muscles that extend the forearm are located __________.

The two heads of the biceps brachii muscle come together distally to insert on the __________.

The smallest of the posterior extensors of the elbow joint is the __________.

The origin of the long head of the triceps brachii is on the _______

Muscles that guard entrances and exits of internal passageways are ________ muscles.

In a ________ muscle, the fascicles are concentrically arranged around an opening.

The type of muscle whose functional characteristics most closely resemble those of its muscle fibers is the ________ muscle.

In a ________ muscle, the muscle fibers and fascicles lie in a slanted or oblique position to the tendon.

________ muscle fibers pull in different directions, permitting different actions depending on stimulation.

In a convergent muscle, fascicles converge on a common attachment site that may be a slender band of collagen fibers known as a(n)

A muscle whose fascicles all pull in the same direction is a __________ muscle.

The fascicle arrangement that permits the greatest exerted force applied to a tendon is __________.

The end of a muscle that remains stationary when the muscle contracts is called the

The end of a muscle that is attached to the point that moves when the muscle contracts is called the

A muscle that opposes the action of another muscle is called its __________.

The external intercostals elevate the rib cage during __________.

The origin of the external obliques includes ribs __________.

The actions of the internal intercostals are most important during __________.

The actions of the internal obliques include __________.

The origins of the rectus abdominus muscle are on the __________.

The "kissing muscle" that purses the lips is the

The sternocleidomastoid inserts on the

Which of the following muscles compresses the abdomen?

Which of the following muscles has its insertion on the sternum?

Ryan hears a loud noise and quickly turns his eyes sideways in the direction of the sound. To accomplish this action he must use his ________ muscles.

The muscle that raises the corners of the mouth as when smiling is the ________ muscle.

The anterior muscles of the thigh that originate on the os coxae are __________.

The iliacus and the psoas major muscles are collectively known as the ____________ muscle because they share a common insertion on the __________ of the femur.

All fibers of the pectoralis major muscle converge on the lateral edge of the__________.

The anterior axial muscle that crosses the glenohumeral joint is the pectoralis major muscle.

The posterior axial muscle that crosses the glenohumeral joint is the __________.

The two heads of the biceps brachii combine to insert on the __________.

Both heads of the biceps femoris muscle __________.

The long head of the biceps femoris muscle originates on the __________.

The biceps femoris is located in the __________.

The brachialis muscle is located __________ to the biceps brachii muscle.

The brachioradialis is a strong forearm __________.

The latissimus dorsi inserts __________.

One of the actions of the latissimus dorsi muscle is to __________.

The vastus intermedius __________ the leg at the knee.

The origin that the vastus medialis muscle shares with the vastus lateralis is the __________.

Muscles of mastication most often insert into the ________.

If Rob says he wants to make his "six-pack" muscles more visible, which muscle(s) is he going to exercise?

The deepest lateral layer of the abdominal muscles is the ________.

Which of the following muscles plays NO role in respiration?

The deltoid muscle fibers are separated into __________.

The middle fibers of the deltoid muscle __________.

The actions of the rhomboid major on the scapula do NOT include __________.

Downward dislocation of the humerus from the glenohumeral joint when carrying weight is prevented by the __________.

The angle of which muscle prevents the humeral head from sliding upward out of the joint as the arm is raised?

The teres major adducts the arm but does not __________ the arm.

The origin of the rectus femoris is the ____________.

The rectus femoris muscle extends the leg at the __________.

The tibialis anterior muscle dorsiflexes the foot at the ankle and also assists in __________ of the foot.