#1
Which muscle is responsible for the movement of the upper arm?
Biceps brachii
ExplanationPrimary muscle for upper arm movement.
#2
What is the primary function of the skeletal muscles?
To move bones
ExplanationMain function: movement of bones.
#3
Which muscle group is primarily involved in the extension of the knee?
Quadriceps
ExplanationMain muscle group for knee extension.
#4
Tendons connect:
Muscles to bones
ExplanationConnective tissues between muscles and bones.
#5
Which of the following muscles is involved in the abduction of the arm?
Deltoid
ExplanationDeltoid muscle abducts the arm.
#6
Which type of muscle tissue is found in the walls of hollow organs?
Smooth muscle
ExplanationSmooth muscle lines hollow organs.
#7
The smallest contractile unit of a muscle fiber is known as:
Sarcomere
ExplanationBasic contractile unit in muscle fibers.
#8
What is the name of the muscle that separates the thoracic and abdominal cavities?
Diaphragm
ExplanationMuscle separating thoracic and abdominal cavities.
#9
Which muscle is known as the 'smiling muscle' because it raises the corners of the mouth?
Zygomaticus major
ExplanationZygomaticus major lifts corners of mouth.
#10
The repeating unit of a skeletal muscle fiber is the:
Sarcomere
ExplanationRepeating unit in skeletal muscle fibers.
#11
What is the role of acetylcholine in muscle contraction?
It is a neurotransmitter that triggers muscle contraction.
ExplanationAcetylcholine triggers muscle contraction.
#12
In which location would you find the intrinsic muscles of the hand?
Within the hand itself, controlling fine movements
ExplanationIntrinsic hand muscles control fine movements.
#13
Which of the following muscles is found in the posterior compartment of the forearm?
Extensor carpi ulnaris
ExplanationExtensor carpi ulnaris in posterior forearm.
#14
Muscle fatigue is most directly caused by a shortage of:
ATP
ExplanationATP shortage causes muscle fatigue.