Muscular System Quiz: Test Your Knowledge of Muscles

Question 1

Classify the muscle tissue that controls deliberate movements, such as walking and lifting.

Accepted Answer

Skeletal muscle

Answer

Smooth muscle

Answer

Cardiac muscle

Question 2

The primary function of the junction between the nerve and muscle cells is to:

Accepted Answer

Transmit nerve impulses to muscle cells

Answer

Store calcium ions

Answer

Generate muscle contractions

Question 3

Which option is not an action of skeletal muscles?

Accepted Answer

Lengthening and decreasing tension (relaxation)

Answer

Bending (flexion)

Answer

Moving a limb away from the midline (abduction)

Answer

Moving a limb towards the midline (adduction)

Question 4

Identify the muscle group that straightens the knee joint.

Accepted Answer

Quadriceps femoris

Answer

Hamstrings

Answer

Biceps femoris

Answer

Gastrocnemius

Question 5

In muscle contraction, which type involves shortening the muscle and generating force?

Accepted Answer

Concentric contraction

Answer

Isometric contraction

Answer

Eccentric contraction

Answer

Isotonic contraction

Question 6

According to the sliding filament theory, which proteins interact to enable muscle contraction?

Accepted Answer

Myosin and actin filaments

Answer

Actin and tubulin filaments

Answer

Troponin and tropomyosin molecules

Answer

Myoglobin and glycogen molecules

Question 7

Which factor does NOT affect muscle strength?

Accepted Answer

Gender

Answer

Type of muscle fibers

Answer

Muscle cross-sectional area

Answer

Regular exercise routine

Question 8

Identify the primary neurotransmitter responsible for initiating skeletal muscle contraction.

Accepted Answer

Acetylcholine

Answer

Dopamine

Answer

Serotonin

Answer

Epinephrine

Question 9

Which muscle is responsible for closing the eyes?

Accepted Answer

Orbicularis oculi

Answer

Levator palpebrae superioris

Answer

Corrugator supercilii

Answer

Frontali

Question 10

Identify the muscle that separates the chest cavity from the abdomen.

Accepted Answer

Diaphragm

Answer

Transversus abdominis

Answer

Obliquus internus abdominis

Answer

Rectus abdominis

Question 11

During muscle contraction, what is the primary role of calcium ions?

Accepted Answer

They bind to troponin, exposing myosin-binding sites on actin.

Answer

They trigger the release of acetylcholine from the motor neuron.

Answer

They stimulate ATP synthesis, providing energy for muscle contraction.

Answer

They inhibit acetylcholine reuptake in the synaptic cleft.

Question 12

Which muscle fiber type exhibits both resistance to fatigue and the capacity to produce substantial force?

Accepted Answer

Type I

Answer

Type IIa

Answer

Type IIb

Question 13

During short, high-intensity activities like sprinting or weightlifting, which energy system is primarily used?

Accepted Answer

ATP-PC system

Answer

Glycolytic system

Answer

Oxidative system

Question 14

Which muscle injury involves a partial or complete tear in the muscle tissue?

Accepted Answer

Strain

Answer

Sprain

Answer

Bruise

Answer

Contusion

Question 15

Which part of the central nervous system is responsible for initiating and coordinating voluntary muscle movements?

Accepted Answer

Cerebral Cortex

Answer

Cerebellum

Answer

Spinal Cord

Answer

Autonomic Nervous System

Question 16

Which assessment technique utilizes a specialized tool to measure the range of motion and strength of a specific muscle group?

Accepted Answer

Goniometry

Answer

Electromyography

Answer

Biopsy

Answer

Magnetic Resonance Imaging (MRI)

Question 17

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

Accepted Answer

Connective tissue

Answer

Skeletal muscle

Answer

Smooth muscle

Answer

Cardiac muscle

Question 18

The primary function of actin and myosin filaments in muscle contraction is to:

Accepted Answer

Slide past each other

Answer

Generate ATP

Answer

Release calcium ions

Answer

Transmit nerve impulses

Question 19

Which neurotransmitter is primarily responsible for initiating muscle contraction?

Accepted Answer

Acetylcholine

Answer

Epinephrine

Answer

Dopamine

Answer

Serotonin

Question 20

The resting membrane potential of a muscle cell is approximately:

Accepted Answer

-70 mV

Answer

-55 mV

Answer

-90 mV

Answer

-110 mV

Question 21

The insertion of a muscle is the point where it:

Accepted Answer

Attaches to a movable bone

Answer

Attaches to a fixed bone

Answer

Generates the greatest force

Answer

Receives its nerve supply

Question 22

The process by which muscles lengthen while under tension is known as:

Accepted Answer

Eccentric contraction

Answer

Concentric contraction

Answer

Isometric contraction

Answer

Isotonic contraction

Question 23

The primary role of the muscle spindle is to:

Accepted Answer

Detect changes in muscle length

Answer

Initiate muscle contraction

Answer

Transmit nerve impulses to the spinal cord

Answer

Regulate blood flow to muscles

Question 24

Which muscle is primarily responsible for pointing the foot downward (plantar flexion) at the ankle joint?

Accepted Answer

Gastrocnemius

Answer

Tibialis anterior

Answer

Peroneus longus

Answer

Extensor hallucis longus

Question 25

During muscle contraction, what happens according to the sliding filament theory?

Accepted Answer

Actin filaments slide past myosin filaments, shortening the muscle.

Answer

Myosin filaments slide past actin filaments, causing muscle relaxation.

Answer

Calcium ions bind to troponin, triggering muscle contraction.

Answer

Muscle contraction occurs without filament movement.

Question 26

Which protein is the most abundant in the human body?

Accepted Answer

Titin

Answer

Actin

Answer

Myosin

Answer

Troponin

Question 27

Which muscle type is responsible for voluntary movement?

Accepted Answer

Skeletal muscle

Answer

Cardiac muscle

Answer

Smooth muscle

Question 28

Which action is NOT performed by skeletal muscles?

Accepted Answer

Sensation

Answer

Movement

Answer

Support

Answer

Heat production

Question 29

What is the primary role of the neuromuscular junction?

Accepted Answer

Transmits electrical impulses from nerves to muscle fibers

Answer

Releases calcium ions into the sarcoplasm

Answer

Initiates muscle contraction

Answer

Provides energy for muscle contraction

Question 30

Which muscle action involves the muscle shortening?

Accepted Answer

Concentric

Answer

Eccentric

Answer

Isometric

Answer

Isokinetic

Question 31

Which neurotransmitter is released at the neuromuscular junction?

Accepted Answer

Acetylcholine

Answer

Dopamine

Answer

Epinephrine

Answer

Serotonin

Question 32

What is the main function of the sarcoplasmic reticulum in muscle contraction?

Accepted Answer

Releases calcium ions into the sarcoplasm

Answer

Stores calcium ions

Answer

Synthesizes ATP

Answer

Transmits electrical impulses

Question 33

According to the sliding filament theory of muscle contraction, which structures slide past each other within the muscle fiber?

Accepted Answer

Both actin and myosin filaments

Answer

Actin filaments

Answer

Myosin filaments

Answer

Neither actin nor myosin filaments

Question 34

Which neurotransmitter is released at the neuromuscular junction to initiate muscle contraction?

Accepted Answer

Acetylcholine

Answer

Dopamine

Answer

Epinephrine

Answer

Serotonin

Question 35

Which type of muscle contraction involves the shortening of the muscle and movement of the ends closer together?

Accepted Answer

Concentric contraction

Answer

Eccentric contraction

Answer

Isometric contraction

Answer

Isokinetic contraction

Question 36

What is the primary function of the sarcoplasmic reticulum in skeletal muscle cells?

Accepted Answer

Storing and releasing calcium ions

Answer

Producing ATP for muscle contraction

Answer

Synthesizing proteins

Answer

Controlling the flow of ions across the muscle membrane

Question 37

Which type of smooth muscle is found in the walls of hollow organs and blood vessels?

Accepted Answer

Visceral smooth muscle

Answer

Multiunit smooth muscle

Answer

Voluntary smooth muscle

Answer

Single-unit smooth muscle

Question 38

Which of the following factors does NOT significantly influence muscle strength?

Accepted Answer

Intelligence

Answer

Muscle fiber type composition

Answer

Age

Answer

Exercise

Question 39

Which protein is responsible for regulating calcium-induced muscle contraction and relaxation?

Accepted Answer

Troponin

Answer

Myosin

Answer

Actin

Answer

Creatine kinase

Question 40

Which muscle group is primarily responsible for extending the elbow joint?

Accepted Answer

Triceps brachii

Answer

Biceps brachii

Answer

Brachioradialis

Answer

Flexor carpi radialis

Question 41

What is the repeating structural unit of a skeletal muscle fiber?

Accepted Answer

Sarcomere

Answer

Myofibril

Answer

Fascicle

Answer

Tendon

Question 42

The neuromuscular junction is responsible for what key step in muscle contraction?

Accepted Answer

Initiating muscle contraction

Answer

Providing energy for muscle contraction

Answer

Regulating muscle relaxation

Answer

Maintaining muscle tone

Question 43

Which proteins are specifically responsible for the contractile properties of skeletal muscle?

Accepted Answer

Actin and myosin

Answer

Troponin and tropomyosin

Answer

Osteocalcin and chondroitin sulfate

Answer

Keratin and collagen

Question 44

Which classification of muscle tissue is under voluntary control and enables conscious movements?

Accepted Answer

Skeletal muscle

Answer

Adipose tissue

Answer

Smooth muscle

Answer

Cardiac muscle

Question 45

Which of the following functions is NOT performed by muscles?

Accepted Answer

Photosynthesis

Answer

Generating movement

Answer

Maintaining posture

Answer

Protecting internal organs

Question 46

What is the term used to describe the fundamental process by which muscles shorten and generate force?

Accepted Answer

Muscle contraction

Answer

Muscle relaxation

Answer

Muscle fiber hypertrophy

Answer

Muscle fiber remodeling

Question 47

Which of the following neurotransmitters is released at the neuromuscular junction to initiate muscle contraction?

Accepted Answer

Acetylcholine

Answer

Epinephrine

Answer

Serotonin

Answer

Dopamine

Question 48

Which type of muscle tissue is characterized by multiple nuclei, striated appearance under a microscope, and long, cylindrical cells termed muscle fibers?

Accepted Answer

Skeletal muscle fibers

Answer

Fibroblasts

Answer

Smooth muscle cells

Answer

Cardiac muscle cells

Question 49

Identify the muscle responsible for flexing the knee joint during movement.

Accepted Answer

Biceps femoris

Answer

Deltoid

Answer

Gastrocnemius

Answer

Triceps brachii

Question 50

What is the name of the specialized connective tissue that surrounds and supports muscles, providing protection and facilitating movement?

Accepted Answer

Fascia

Answer

Cartilage

Answer

Ligament

Answer

Tendon

Question 51

What is the role of antagonist muscles in skeletal movement?

Accepted Answer

Relaxing and lengthening to oppose the action of agonist muscles

Answer

Stabilizing joints during movement

Answer

Initiating movement by contracting

Answer

Generating heat to maintain body temperature