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WorksheetsMuscular System Review
Total questions: 65
Worksheet time: 33mins
What does the muscular system consist of?
Bones and ligaments
Nerves and neurons
Muscles and muscle tissues
Skin and hair
Which of the following is a function of the muscular system?
Producing hormones
Facilitating mobility
Digesting food
Filtering blood
How does the muscular system help in the cardiovascular system?
By generating heat
By stabilizing joints
By facilitating the movement of blood
By maintaining posture
Which function is NOT performed by the muscular system?
Generating heat
Protecting internal organs
Producing red blood cells
Stabilizing joints
What is the ability of muscle tissue to respond to a stimulus called?
Contractility
Extensibility
Excitability
Elasticity
Which property of muscle tissue refers to its ability to shorten and generate a pulling force?
Elasticity
Contractility
Extensibility
Excitability
What does extensibility in muscle tissue refer to?
Ability to respond to stimulus
Ability to be stretched
Ability to bounce back after being stretched
Ability to shorten to generate a pulling force
Which property of muscle tissue allows it to bounce back after being stretched?
Extensibility
Contractility
Elasticity
Excitability
What are muscle cells also known as?
Myocytes
Neurons
Osteocytes
Erythrocytes
Which proteins are most notably responsible for muscle contraction?
Actin and myosin
Keratin and collagen
Hemoglobin and insulin
Elastin and fibrin
Muscle tissue is classified into which of the following types?
Cardiac, visceral, skeletal
Nervous, epithelial, connective
Adipose, cartilage, bone
Smooth, rough, fibrous
What is the primary function of cardiac muscle tissue?
To aid in digestion
To form the majority of the walls of the heart
To support bone structure
To regulate body temperature
What is another name for cardiac muscle tissue?
Myocardium
Endocardium
Pericardium
Epicardium
How does cardiac muscle tissue function?
Voluntarily
Involuntarily
With conscious thought
With external stimulation
What causes the striations in cardiac muscle tissue?
Random arrangement of cells
Alternating arrangement of certain proteins
Uniform distribution of fat
Consistent blood flow
Where is smooth muscle tissue commonly found?
In the heart
In the walls of hollow organs like the stomach and intestines
In the skeletal muscles
In the brain
What is the shape of the fibers in smooth muscle tissue?
Striated and cylindrical
Spindle-shaped without striations
Branched and striated
Flat and rectangular
What is the primary function of smooth muscle tissue?
To move bones
To contract for voluntary movements
To cause involuntary movements of organs
To transmit nerve impulses
What type of muscle tissue forms the muscles attached to bones throughout the body?
Cardiac muscle tissue
Smooth muscle tissue
Skeletal muscle tissue
Connective tissue
What percentage of the body's total mass is made up of skeletal muscle tissue?
20%
30%
40%
50%
Which type of muscle tissue is considered voluntary?
Cardiac muscle tissue
Smooth muscle tissue
Skeletal muscle tissue
Nervous tissue
What is one of the functions of skeletal muscle tissue?
Pumping blood
Digesting food
Providing movement of the body
Producing hormones
How is skeletal muscle tissue structured?
As smooth, non-striated fibers
As cylindrical, striated fibers
As branched, striated fibers
As flat, non-striated fibers
Which type of muscle is responsible for voluntary movements in the body?
Skeletal Muscle
Smooth Muscle
Cardiac Muscle
Nervous Tissue
Which type of muscle is found in the walls of internal organs and is involuntary?
Skeletal Muscle
Smooth Muscle
Cardiac Muscle
Connective Tissue
Which type of muscle is unique to the heart?
Skeletal Muscle
Smooth Muscle
Cardiac Muscle
Epithelial Tissue
What are skeletal muscle fibers composed of?
Myofibrils
Sarcomeres
Endomysium
Perimysium
What is the membrane that covers skeletal muscle fibers called?
Endomysium
Sarcolemma
Perimysium
Fascicle
What is the layer of connective tissue that surrounds and protects skeletal muscle fibers?
Sarcolemma
Perimysium
Endomysium
Myofibrils
What are bundles of skeletal muscle fibers called?
Sarcomeres
Fascicles
Myofibrils
Sarcolemma
What is the connective tissue layer that surrounds each fascicle?
Endomysium
Sarcolemma
Perimysium
Myofibrils
What are skeletal muscles formed by?
Bundles of fascicles
Layers of skin
Chains of neurons
Sheets of cartilage
What is the connective tissue layer that covers fascicles in skeletal muscles called?
Perimysium
Epimysium
Endomysium
Sarcolemma
What role do nerves play in skeletal muscles?
They provide nutrients
They allow communication with the brain
They store energy
They produce hormones
What is the function of blood vessels in skeletal muscles?
To transmit signals
To provide nutrients
To store oxygen
To produce energy
What is the term for the sheaths of connective tissue that surround, protect, and support skeletal muscles?
Superficial fascia
Deep fascia
Myofibrils
Tendons
What is the outermost layer of connective tissue surrounding a muscle?
Endomysium
Perimysium
Epimysium
Sarcolemma
Which structure is responsible for the contraction of muscle fibers?
Sarcoplasmic Reticulum
Myofibril
Deep Fascia
Sarcolemma
What is the basic contractile unit of a muscle fiber?
Sarcomere
Myosin
Actin
Fascicle
Which component of the muscle fiber stores calcium ions?
Sarcolemma
Sarcoplasmic Reticulum
Myofibril
Endomysium
What is the origin of a muscle?
The attachment site that moves during muscular contraction
The attachment site that does not move when the muscle contracts
The site where the muscle receives nerve signals
The site where the muscle receives blood supply
What is the insertion of a muscle?
The attachment site that does not move when the muscle contracts
The site where the muscle receives blood supply
The attachment site that moves during muscular contraction
The site where the muscle receives nerve signals
What is the primary function of tendons in the human body?
Attach bone to bone
Attach muscle to bone
Connect nerves to muscles
Connect skin to muscles
Which of the following is an example of a tendon?
Achilles Tendon
Patellar Ligament
Anterior Cruciate Ligament
Medial Collateral Ligament
What is the primary function of ligaments in the human body?
Attach muscle to bone
Attach bone to bone
Connect skin to muscles
Connect nerves to muscles
What is responsible for muscle movement?
Blood flow
Nerve signals
Interaction of actin and myosin
Bone structure
What happens when proteins actin and myosin interact?
The muscle relaxes
The sarcomeres lengthen
The entire fiber shortens and the muscle contracts
The muscle expands
What are sarcomeres?
The outer layer of muscles
Functional contractile units of myofibrils
A type of muscle tissue
Connective tissue in muscles
What are sarcomeres composed of?
Alternating thick and thin myofilaments
Only thick myofilaments
Only thin myofilaments
Randomly arranged myofilaments
Where are the thin filaments of actin located in a sarcomere?
At either end of the sarcomere
In the middle of the sarcomere
Throughout the sarcomere
Outside the sarcomere
What type of filaments lie at the middle of the sarcomere?
Thick filaments of myosin
Thin filaments of actin
Elastic titin filaments
Regulatory nebulin filaments
Which of the following is an example of supportive accessory proteins in sarcomeres?
Elastic titin filaments
Thick myosin filaments
Thin actin filaments
Collagen fibers
What are the Z lines at the ends of a sarcomere composed of?
Crosslinked mix of actin and titin
Only actin filaments
Only myosin filaments
Crosslinked mix of myosin and titin
Which filament is described as the region with actin filaments but no myosin filaments?
Thin filament
Thick filament
Z line
H zone
What is the length of the myosin filament referred to as?
Thick filament
Thin filament
Z line
H zone
What does the H zone in the middle of a sarcomere include?
M line of myosin crosslinked with titin
Only actin filaments
Only titin filaments
Z line of actin crosslinked with myosin
What does the Sliding Filament Theory describe?
The process of muscle relaxation
The process of muscle contraction
The process of nerve signaling
The process of blood circulation
What happens when a sarcomere shortens according to the Sliding Filament Theory?
Filaments break apart
Filaments slide over one another
Filaments dissolve
Filaments become rigid
Which filaments have heads that become activated by biochemical reactions?
Actin filaments
Myosin filaments
Collagen filaments
Elastin filaments
Where does shortening occur in a sarcomere?
A bands and Z lines
I bands and H zones
M lines and Z lines
A bands and I bands
What happens to actin and myosin filaments during muscle contraction?
They change length.
They slide past each other.
They break apart.
They fuse together.
What causes muscle contraction?
Biochemical reactions caused by nerve impulses
Increase in blood flow
Decrease in body temperature
Lack of oxygen
What determines the amount of force generated by muscle contraction?
The number of fibers stimulated and their condition
The length of the muscle
The temperature of the environment
The amount of blood in the muscle
Which muscle is responsible for moving the radius bone in the forearm?
Biceps brachii
Triceps brachii
Deltoid
Pectoralis major
What is an example of a muscle that moves the skin?
Orbicularis oculi
Gastrocnemius
Latissimus dorsi
Rectus abdominis
