Massage and Bodywork Licensing Examination MBLEx Test Anatomy and Physiology 1

Question 1

Which layer of the epidermis is responsible for continuous cell division to replenish skin cells?

Accepted Answer

Stratum basale

Answer

The stratum basale is the deepest epidermal layer, sitting directly atop the dermis. It contains mitotically active keratinocytes that constantly divide, pushing older cells toward the surface to replace those that are shed.

Question 2

The head of the femur articulates with which structure to form the hip joint?

Accepted Answer

Acetabulum

Answer

The rounded head of the femur fits into the cup-shaped acetabulum of the os coxae (hip bone), creating the ball-and-socket hip joint. This structure provides both stability and a wide range of motion.

Question 3

Which neurotransmitter is released at the neuromuscular junction to initiate skeletal muscle contraction?

Accepted Answer

Acetylcholine

Answer

Motor neurons release acetylcholine (ACh) into the synaptic cleft at the neuromuscular junction. ACh binds to nicotinic receptors on the motor end plate, generating an action potential that triggers the muscle fiber to contract.

Question 4

The sinoatrial (SA) node, which generates the heart's electrical impulse, is located in which chamber?

Accepted Answer

Right atrium

Answer

The SA node sits in the posterior wall of the right atrium, near the opening of the superior vena cava. It spontaneously depolarizes to set the normal sinus rhythm and is therefore called the heart's natural pacemaker.

Question 5

Which of the following muscles is NOT part of the rotator cuff?

Accepted Answer

Teres major

Answer

The rotator cuff is made up of four muscles — supraspinatus, infraspinatus, teres minor, and subscapularis (SITS). Teres major is a separate muscle that medially rotates and adducts the arm but does not attach to the glenohumeral capsule.

Massage and Bodywork Licensing Examination Practice Test

Massage and Bodywork Licensing Examination Practice Test

Massage and Bodywork Licensing Examination MBLEx Test Anatomy and Physiology 1