Ch 6 Muscular System

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Which of these pathways to regenerate ATP during muscle activity is the fastest:

Anaerobic glycolysis and lactic acid formation

Which muscle type moves bones and facial skin?

Skeletal

The type of muscle tissue pictured in Figure 6.3 is:

Smooth muscle

A sarcomere is:

The contractile unit between two Z discs

Primary action of the deltoid AND the movement of a limb away from the body midline:

Abduction

Anaerobic glycolysis occurs without:

Oxygen

Which muscle type(s) do(es) NOT have striations?

Smooth

Primary action of the rectus abdominis AND type of movement that decreases the angle of a joint:

Flexion

The muscle tissue type that consists of single, very long, cylindrical, multinucleate cells with very obvious striations is:

Skeletal muscle only

Which of the following is NOT a function of the muscular system:

Hematopoiesis

Which one of the following muscle actions would NOT be classified as an isotonic contraction:

Pushing against a stationary wall

The striations that give skeletal muscle its characteristics striped appearance are produced, for the most part, by:

The arrangement of myofilaments

Muscle tissue that has involuntary regulation of contraction is:

Cardiac muscle and smooth muscle

What type of membrane wraps a fascicle:

Perimysium

Which muscle type(s) is(are) voluntary?

Skeletal muscle

Place these structures of the skeletal muscle in order from largest to smallest:
1. fascicle
2. myofilament
3. muscle fiber
4. myofibril
5. sarcomere

1,3,4,5,2

Which muscle type has layers arranged both longitudinally and circularly to change shape and size?

Smooth

True or False: Lactic acid results from aerobic respiration.

False

The condition of skeletal muscle fatigue can be best explained by:

Insufficient intracellular quantities of ATP due to excessive consumption.

Which of the following does not describe cardiac muscle tissue:

Attached to bones

Creatine phosphate (CP) functions within the muscle cells by:

Storing energy that will be transferred to ADP to resynthesize ATP as needed.

True or False: a contraction in which a skeletal muscle does not shorten but its tension increases is called isometric.

True

Which muscle type is only found in the heart?

Cardiac

The plasma membrane of a muscle cell is called the:

Sarcolemma

Which one of the following is composed of myosin protein:

Thick filaments

Type of movement that results when the forearm rotates laterally so that the palm faces anteriorly:

Supination

The movement of a bone around its longitudinal axis:

Rotation

Type of movement that results when the forearm rotates medially so the palm faces posterioly:

Pronation

The insertion of the gluteus maximus is the:

Femur

Which of the following muscles closes the jaw:

The masseter and the temporalis

Sandra is playing the piano for her recital. Which muscle is not involved in the movement of her hands and/or fingers:

Extensor digitorum longus

Which of the following muscles inserts on the calcaneus:

The soleus

Which one of the following does NOT compress the abdomen:

Latissimus dorsi

A muscle located on the ventral (anterior) side of the body is the:

Pectoralis major

A nursing infant develops a powerful sucking muscle that adults also use for the whistling or blowing a trumpet called the:

Buccinator

Which of these muscles is not responsible for flexion or extension of the arm:

Platysma

A muscle group that works with and assists the action of a prime mover is a(n):

Synergist only

Which of the following muscles is not involved in dorsiflexion and/or plantar flexion of the foot:

Iliopsoas

Which one of the following is the action of the orbicularis oris:

Closes, purses, and protrudes the lips.

Paralysis of which of the following would make an individual unable to flex the thigh:

Iliopsoas and rectus femoris

Which one of the following muscles is involved in abduction of the arm at the shoulder joint:

Deltoid

Which of the following muscles adducts the thigh:

Adductor muscles

While doing "jumping jacks" during an exercise class, your arms and legs move laterally away from the midline of your body. This motion is called:

Abduction

Which of the following muscles are antagonists

Biceps brachii and triceps brachii

Paralysis of which of the following would make an individual unable to flex the knee:

Hamstring muscle group

Which one of the following is NOT a criteria generally used in naming muscles:

Method of attachment of the muscle to bone

Connective tissue ensheating the entire muscle.

Epimysium

Connective tissue surrounding a fascicle.

Perimysium

Thin connective tissue investing each muscle cell.

Endomysium

Plasma membrane of the muscle cell

Sarcolemma

Cordlike extension of connective tissue beyond the muscle, serving to attach it to the bone.

Tendon

A muscle cell

Fiber

A discrete bundle of muscle cells.

Fascicle

A long, filamentous organelle found within muscle cells that has a banded appearance.

Myofibril

Contractile unit of muscle

Sarcomere

Actin- or myosin-containing structure

Myofilament

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