#1
Which muscle is responsible for bending the arm?
Biceps brachii
Triceps brachii
Deltoid
Serratus anterior
#2
Which of the following is not a type of muscle tissue?
Cardiac muscle
Skeletal muscle
Smooth muscle
Neural muscle
#3
Which muscle is responsible for breathing?
Diaphragm
Pectoralis major
Rectus abdominis
Soleus
#4
Which of the following is not a component of a lever?
Fulcrum
Force
Resistance
Pulley
#5
Which muscle is responsible for extending the knee?
Hamstring
Quadriceps
Gastrocnemius
Adductor
#6
What is the main function of the muscular system?
To provide structure and support
To produce movement
To regulate body temperature
To transport oxygen
#7
Which mechanical principle describes the relationship between force, mass, and acceleration?
Pascal's principle
Archimedes' principle
Newton's first law of motion
Newton's second law of motion
#8
What is the main function of the trapezius muscle?
Flexes the elbow
Extends the knee
Stabilizes the shoulder
Raises the eyebrows
#9
Which mechanical principle explains why a seesaw works?
Pascal's principle
Archimedes' principle
Lever principle
Bernoulli's principle
#10
What is the main function of the deltoid muscle?
Flexes the elbow
Extends the knee
Raises the arm
Stabilizes the pelvis
#11
What is the term for the smallest functional unit of a muscle?
Myofibril
Sarcomere
Myofilament
Myosin
#12
What is the function of the neuromuscular junction?
To transmit signals from the brain to the muscle
To produce neurotransmitters
To connect muscles to bones
To allow communication between neurons and muscles
#13
What is the role of actin in muscle contraction?
Forms the thick filaments
Binds to calcium ions
Generates ATP
Forms the thin filaments
#14
What is the function of tropomyosin in muscle contraction?
Regulates the availability of calcium ions
Forms the thick filaments
Cross-links actin filaments
Generates ATP
#15
What is the role of troponin in muscle contraction?
Binds to calcium ions
Forms the thin filaments
Generates ATP
Regulates the availability of calcium ions