#1
Which of the following muscles is responsible for knee extension?
Rectus femoris
ExplanationRectus femoris extends the knee by pulling on the patellar tendon.
#2
What is the primary function of the biceps brachii muscle?
Elbow flexion
ExplanationBiceps brachii flexes the elbow joint when contracting.
#3
Which of the following terms describes a movement that decreases the angle between two body parts?
Flexion
ExplanationFlexion refers to the movement that decreases the angle between two body parts, typically in the sagittal plane.
#4
What is the anatomical term for the shoulder blade?
Scapula
ExplanationThe scapula, or shoulder blade, is a flat bone located on the posterior side of the thoracic cage.
#5
Which of the following muscles is NOT part of the rotator cuff?
Teres major
ExplanationTeres major is not part of the rotator cuff; it mainly functions in arm adduction and medial rotation.
#6
Which of the following joints allows for circumduction movement?
Hip joint
ExplanationThe hip joint permits circumduction, a circular movement, due to its ball-and-socket structure.
#7
What type of lever system is represented by the arrangement of the effort (E), load (L), and fulcrum (F) in the body when performing a biceps curl with a dumbbell?
Third-class lever
ExplanationA biceps curl exemplifies a third-class lever system, with the effort (muscle force) between the fulcrum (elbow joint) and the load (dumbbell weight).
#8
During which phase of gait does the foot initially make contact with the ground?
Initial contact
ExplanationThe phase of gait where the foot first makes contact with the ground is known as initial contact.
#9
Which muscle is primarily responsible for plantar flexion of the ankle?
Soleus
ExplanationThe soleus muscle, along with the gastrocnemius, primarily performs plantar flexion of the ankle.
#10
What is the primary function of the triceps brachii muscle?
Elbow extension
ExplanationThe triceps brachii muscle primarily extends the elbow joint when contracting.
#11
Which of the following proprioceptors are responsible for detecting changes in muscle length?
Muscle spindles
ExplanationMuscle spindles are proprioceptors that detect changes in muscle length, contributing to the stretch reflex.
#12
Which of the following movements is associated with the sagittal plane?
Elbow flexion
ExplanationElbow flexion occurs in the sagittal plane, which divides the body into left and right halves.
#13
Which muscle is NOT involved in dorsiflexion of the ankle?
Gastrocnemius
ExplanationThe gastrocnemius primarily performs plantar flexion, not dorsiflexion, of the ankle.
#14
Which of the following muscles is NOT involved in shoulder abduction?
Pectoralis major
ExplanationPectoralis major primarily functions in shoulder adduction, not abduction.
#15
Which muscle is primarily responsible for wrist flexion?
Flexor carpi radialis
ExplanationFlexor carpi radialis is a forearm muscle primarily responsible for wrist flexion.