MBLEx Kinesiology 1 Flashcards
6 cards from real Massage and Bodywork Licensing Examination practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 MBLEx Kinesiology 1 flashcards as text
Which muscle of the quadriceps group is the only one that also crosses the hip joint, making it biarticular?
Answer: Rectus femoris
The rectus femoris originates on the anterior inferior iliac spine (AIIS), crossing both the hip and knee joints. The three vastus muscles originate on the femur itself and only cross the knee, making them uniarticular.
Movements such as flexion and extension occur in which plane of the body?
Answer: Sagittal plane
The sagittal plane divides the body into left and right halves. Movements that occur within this plane — primarily flexion and extension — rotate around a mediolateral (side-to-side) axis.
Which rotator cuff muscle is primarily responsible for initiating the first 15–30 degrees of shoulder abduction?
Answer: Supraspinatus
The supraspinatus, running through the supraspinous fossa and under the acromion, initiates abduction of the arm. The deltoid takes over as the primary abductor after the first 15–30 degrees.
A muscle contraction in which the muscle generates force without any change in its length is called:
Answer: Isometric contraction
In an isometric contraction, tension is developed but the muscle neither shortens nor lengthens — the joint angle remains constant. This occurs when holding a static position against resistance.
What combined actions does the biceps brachii perform at the forearm?
Answer: Flexion and supination
The biceps brachii flexes the elbow and supinates the forearm (rotating the palm upward). Supination is actually its most powerful action; the brachialis is a stronger pure elbow flexor.
Which property of muscle tissue describes its ability to return to its resting length after being passively stretched?
Answer: Elasticity
Elasticity is the property that allows muscle (and connective tissue) to recoil back to its original length after a stretching force is removed, similar to a rubber band. Extensibility refers to the ability to be stretched in the first place.