The Muscular System: Structure, Function, and Movement

Question 1

Which of the following is a unique characteristic of muscle tissue?

Accepted Answer

Ability to contract

Answer

Voluntary control

Answer

Most abundant tissue in the body

Answer

Lack of blood supply

Question 2

Which of the following is NOT a type of muscle tissue?

Accepted Answer

Adipose tissue

Answer

Skeletal muscle

Answer

Smooth muscle

Answer

Cardiac muscle

Question 3

What is the primary function of skeletal muscle?

Accepted Answer

Producing voluntary movement

Answer

Secreting hormones

Answer

Transporting substances

Answer

Protecting internal organs

Question 4

Which of the following is NOT a primary function of the muscular system?

Accepted Answer

Regulating blood sugar levels

Answer

Generating force for movement

Answer

Maintaining body posture and stability

Answer

Protecting and supporting internal organs

Question 5

Which function is NOT performed by skeletal muscle?

Accepted Answer

Secreting digestive enzymes

Answer

Generating movement

Answer

Maintaining body posture

Answer

Producing body heat

Question 6

Within a skeletal muscle fiber, what is the fundamental unit responsible for muscle contraction?

Accepted Answer

Sarcomere

Answer

Myofibril

Answer

Myofilament

Answer

Myosin head

Question 7

Which of the following functions is NOT performed by the muscular system?

Accepted Answer

Sensory perception and response

Answer

Movement and locomotion

Answer

Joint stabilization and posture maintenance

Answer

Heat production for body temperature regulation

Question 8

In muscle contraction, which protein changes shape when calcium binds, exposing the myosin-binding site on actin and triggering contraction?

Accepted Answer

Troponin

Answer

Actin

Answer

Myosin

Answer

Rigor

Question 9

What is the main role of the sarcomere in muscle contraction?

Accepted Answer

Allows actin and myosin filaments to slide, causing muscle shortening.

Answer

Stores calcium ions for muscle contraction.

Answer

Provides energy for muscle contraction.

Answer

Maintains the length of muscle fibers.

Question 10

Which of the following describes the mechanism of muscle contraction according to the sliding filament theory?

Accepted Answer

Myosin heads bind to actin filaments and pull them towards the center of the sarcomere, causing muscle shortening.

Answer

Actin filaments slide over myosin filaments, leading to muscle contraction.

Answer

Calcium ions bind to troponin, exposing binding sites on actin for myosin to attach to, initiating muscle contraction.

Answer

The sarcoplasmic reticulum releases calcium ions into the cytosol, triggering muscle contraction.

Question 11

Within the microscopic structure of a skeletal muscle fiber, what is the fundamental functional unit?

Accepted Answer

Sarcomere

Answer

Myofibril

Answer

Myofilament

Answer

Fascicle

Question 12

Which of the following is NOT a type of muscle tissue?

Accepted Answer

Adipose tissue

Answer

Skeletal muscle

Answer

Smooth muscle

Answer

Cardiac muscle

Question 13

Which of the following is **not** a function of the muscular system?

Accepted Answer

Electrical impulse transmission

Answer

Movement

Answer

Support

Answer

Heat production

Question 14

Within skeletal muscle, what structure is the smallest unit responsible for contraction?

Accepted Answer

Sarcomere

Answer

Myofibril

Answer

Myosin filament

Answer

Actin filament

Question 15

Which of these is a feature of smooth muscle?

Accepted Answer

Involuntary contractions

Answer

Striated appearance

Answer

Rapid contraction speed

Answer

Found only in skeletal muscles

Question 16

What is the primary function of the muscular system?

Accepted Answer

Generate force, produce movement, and maintain posture

Answer

Regulate body temperature and protect internal organs

Answer

Transport oxygen and nutrients throughout the body

Answer

Control hormone levels and regulate metabolism

Question 17

Which type of muscle tissue in the human body is directly attached to bones and enables voluntary movement?

Accepted Answer

Skeletal muscle

Answer

Cardiac muscle

Answer

Smooth muscle

Answer

Connective muscle

Question 18

Which of the following is NOT a type of muscle tissue?

Accepted Answer

Adipose

Answer

Skeletal

Answer

Cardiac

Answer

Smooth

Question 19

Which characteristic is NOT associated with fast-twitch muscle fibers?

Accepted Answer

Resistance to fatigue

Answer

High force generation

Answer

Abundance of myosin filaments

Answer

Rapid contraction ability

Question 20

Which muscle type allows for voluntary, controlled movements, like lifting your arm or walking?

Accepted Answer

Skeletal muscle

Answer

Cardiac muscle

Answer

Smooth muscle

Answer

Visceral muscle

Question 21

Which of the following is NOT a type of muscle tissue?

Accepted Answer

Nervous tissue

Answer

Skeletal muscle

Answer

Smooth muscle

Answer

Cardiac muscle

Question 22

Within a skeletal muscle fiber, which structure is the fundamental functional unit responsible for muscle contraction?

Accepted Answer

Myofibril

Answer

Sarcolemma

Answer

Sarcoplasm

Answer

Tendon

Question 23

Which of the following is NOT a type of muscle tissue?

Accepted Answer

Nervous tissue

Answer

Cardiac muscle

Answer

Skeletal muscle

Answer

Smooth muscle

Question 24

Which function is NOT performed by the muscular system?

Accepted Answer

Detecting and transmitting sensory information

Answer

Generating movement

Answer

Providing support and protection to internal organs

Answer

Regulating body temperature

Question 25

What is the primary function of the muscular system?

Accepted Answer

Generating movement

Answer

Pumping blood

Answer

Digesting food

Answer

Regulating body temperature

Question 26

What is the main job of your muscles?

Accepted Answer

Making your body move

Answer

Helping you breathe

Answer

Making hormones

Answer

Balancing fluids in your body

Question 27

Which of the following is the primary component of adipose tissue, unlike cardiac, skeletal, and smooth muscle tissue?

Accepted Answer

Fat cells

Answer

Myofilaments

Answer

Sarcomeres

Answer

Myoglobin

Question 28

What is the smallest unit of skeletal muscle that can contract?

Accepted Answer

Sarcomere

Answer

Myofibril

Answer

Myofilament

Answer

Fascicle

Question 29

What is the microscopic unit responsible for muscle contraction in skeletal muscle?

Accepted Answer

Sarcomere

Answer

Myofibril

Answer

Myofilament

Answer

Muscle fiber

Question 30

Which of the following correctly describes the characteristics of skeletal muscle?

Accepted Answer

Voluntary and striated

Answer

Involuntary and non-striated

Answer

Voluntary and non-striated

Question 31

Which of the following is the smallest functional unit of skeletal muscle tissue?

Accepted Answer

Sarcomere

Answer

Myofibril

Answer

Myofilament

Answer

Motor unit

Question 32

What is the primary function of the sarcomere in muscle contraction?

Accepted Answer

Generating force

Answer

Transmitting nerve impulses

Answer

Storing energy

Question 33

Which of the following is a key characteristic of muscular dystrophy?

Accepted Answer

Progressive muscle weakness

Answer

Improved muscle function with exercise

Answer

Increased muscle mass

Question 34

When muscles become exhausted, what common symptom is observed?

Accepted Answer

Diminished muscle strength

Answer

Increased muscle size

Answer

Improved muscle stamina

Question 35

When muscles work against each other to control movement, what type of muscle action is taking place?

Accepted Answer

Antagonistic action

Answer

Agonistic action

Answer

Synergistic action

Question 36

Which of the following is a common symptom associated with muscular dystrophy?

Accepted Answer

Progressive muscle weakness

Answer

Increased muscle strength

Answer

Improved coordination and balance

Answer

Absence of muscle pain or discomfort

Question 37

In a skeletal muscle fiber, the sarcomere is the basic unit of contraction. What is the sarcomere's primary function in the muscle contraction process?

Accepted Answer

Acts as the contractile unit where actin and myosin filaments slide past each other

Answer

Initiates the release of calcium ions, triggering muscle contraction

Answer

Transmits nerve impulses from the motor neuron to the muscle fiber

Question 38

In a skeletal muscle fiber, which structure is the smallest, repeating unit that causes muscle contraction at the microscopic level?

Accepted Answer

Sarcomere

Answer

Myofibril

Answer

Fascicle

Answer

Muscle fiber

Question 39

In the microscopic anatomy of a skeletal muscle fiber, which component serves as the functional unit responsible for muscle contraction?

Accepted Answer

Sarcomere

Answer

Myofibril

Answer

Myofilament

Answer

Fascicle

Question 40

Which neurotransmitter is released by a motor neuron at the neuromuscular junction to trigger muscle contraction?

Accepted Answer

Acetylcholine

Answer

Dopamine

Answer

Serotonin

Answer

Epinephrine

Question 41

Muscular dystrophies are characterized by:

Accepted Answer

Progressive loss of muscle function and strength

Answer

Sudden onset and rapid resolution

Answer

Limited impact to specific muscle groups

Answer

A single, known genetic cause

Question 42

Within skeletal muscle, what is the fundamental repeating unit responsible for muscle contraction?

Accepted Answer

Sarcomere

Answer

Actin filament

Answer

Myosin filament

Answer

Myofibril

Question 43

Which of the following is a common symptom of muscular dystrophy?

Accepted Answer

Progressive muscle weakness, particularly in the legs

Answer

Increased muscle size and strength

Answer

Enhanced coordination and balance

Answer

Absence of muscle pain or discomfort

Question 44

How does the sarcomere contribute to muscle contraction, as explained by the sliding filament theory?

Accepted Answer

Generates force by sliding thick and thin filaments.

Answer

Stores calcium ions to trigger contraction.

Answer

Controls protein synthesis for muscle growth and repair.

Question 45

A patient has a weakened left deltoid muscle. Which movement would be primarily affected?

Accepted Answer

Lifting the arm away from the body

Answer

Arm bending

Answer

Rotating the forearm inward

Question 46

A patient presents with a complaint of having 'pulled a muscle' in their leg during a soccer game. Which of the following is the most appropriate initial treatment for this patient's injury?

Accepted Answer

Apply ice to the injured area

Answer

Apply heat to the injured area

Answer

Massage the injured muscle

Answer

Stretch the injured muscle

Question 47

What is the main action of the biceps brachii muscle?

Accepted Answer

Bending the elbow

Answer

Moving the arm away from the body

Answer

Straightening the wrist

Answer

Bringing the arm towards the body

Question 48

What three factors primarily determine muscle strength and power?

Accepted Answer

Muscle fiber composition, training methods, and nutrition

Answer

Muscle fiber composition and genetics

Answer

Training methods and nutrition only

Question 49

How does aging affect the muscular system?

Accepted Answer

Decreases muscle mass and muscle strength

Answer

Decreases muscle mass and increases muscle strength

Answer

Increases muscle mass and decreases muscle strength

Answer

Increases muscle mass and muscle strength

Question 50

Which of the following statements about rehabilitation techniques for muscle injuries is accurate?

Accepted Answer

The effectiveness of a rehabilitation technique depends on the injury's severity and the patient's needs.

Answer

Physical therapy is the most effective technique for all muscle injuries.

Answer

Massage therapy can reduce muscle pain and inflammation but cannot treat muscle tears.

Answer

Acupuncture has no scientific evidence to support its use in treating muscle injuries.

Question 51

Which physiological adaptations occur in the muscular system due to regular exercise training?

Accepted Answer

Increased muscle mass, strength, endurance, and power output

Answer

Decreased muscle mass, strength, endurance, and power output

Answer

Increased muscle mass, decreased strength, impaired endurance, and reduced power output

Answer

Decreased muscle mass, increased strength, improved endurance, and enhanced power output

Question 52

Which type of muscle tissue is involuntary and found in the walls of internal organs?

Accepted Answer

Smooth muscle

Answer

Skeletal muscle

Answer

Cardiac muscle

Answer

Striated muscle

Question 53

The muscle that extends the knee joint is the:

Accepted Answer

Quadriceps

Answer

Hamstring

Answer

Calf

Answer

Gluteus maximus

Question 54

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

Accepted Answer

Vision

Answer

Movement

Answer

Heat production

Answer

Blood circulation

Question 55

The sliding filament theory of muscle contraction explains:

Accepted Answer

How muscle fibers shorten and lengthen

Answer

The role of calcium in muscle contraction

Answer

The energy source for muscle contraction

Answer

The innervation of muscle fibers

Question 56

Which of the following is a neurotransmitter involved in muscle contraction?

Accepted Answer

Acetylcholine

Answer

Dopamine

Answer

Serotonin

Answer

Norepinephrine

Question 57

What is the term for a muscle that helps another muscle in a particular movement?

Accepted Answer

Synergist

Answer

Prime mover

Answer

Antagonist

Answer

Fixator

Question 58

The muscle that flexes the wrist joint is the:

Accepted Answer

Flexor carpi radialis

Answer

Biceps brachii

Answer

Triceps brachii

Answer

Brachioradialis

Question 59

Which of the following is a major muscle group of the back?

Accepted Answer

Trapezius

Answer

Quadriceps

Answer

Hamstrings

Answer

Gastrocnemius

Question 60

The muscle that abducts the shoulder joint is the:

Accepted Answer

Deltoid

Answer

Pectoralis major

Answer

Latissimus dorsi

Answer

Biceps brachii

Question 61

Which muscle fiber type is known for its endurance, low force output, and crucial role in maintaining posture?

Accepted Answer

Type I muscle fibers

Answer

Type IIx muscle fibers

Answer

Type IIa muscle fibers

Answer

Type III muscle fibers

Question 62

Which type of muscle fiber is NOT found in skeletal muscle?

Accepted Answer

Smooth

Answer

Fast-twitch oxidative-glycolytic

Answer

Slow-twitch oxidative

Question 63

Which of the following is not a type of skeletal muscle fiber?

Accepted Answer

Cardiac muscle

Answer

Type I

Answer

Type IIa

Answer

Type IIx

Question 64

To optimize muscle recovery after an intense workout, which nutrient combination is crucial for muscle regeneration, reduced soreness, and accelerated recovery?

Accepted Answer

Carbohydrates, protein, and water

Answer

Protein, vitamins, and calcium

Answer

Fiber, fats, and electrolytes

Answer

Sugary drinks, caffeine, and alcohol