Massage and Bodywork Licensing Examination MBLEx Anatomy and Physiology 1 — Questions and Answers
Question 1: Which bone forms the posterior portion of the hard palate?
- Maxilla
- Vomer
- Palatine bone (Correct answer)
- Sphenoid bone
Correct answer: Palatine bone
The hard palate is formed by two bones: the palatine processes of the maxilla anteriorly, and the horizontal plates of the palatine bones posteriorly. The vomer forms the nasal septum, and the sphenoid is part of the cranial floor.
Question 2: Which neurotransmitter is released at the neuromuscular junction to trigger skeletal muscle contraction?
- Dopamine
- Serotonin
- Norepinephrine
- Acetylcholine (Correct answer)
Correct answer: Acetylcholine
Acetylcholine (ACh) is released from the motor neuron terminal and binds to nicotinic receptors on the motor end plate, generating an action potential that initiates the contraction cascade within the muscle fiber.
Question 3: The sinoatrial (SA) node, which sets the heart's natural rhythm, is located in which structure?
- Left ventricle
- Left atrium
- Right ventricle
- Right atrium (Correct answer)
Correct answer: Right atrium
The SA node is embedded in the posterior wall of the right atrium, near the opening of the superior vena cava. It generates spontaneous electrical impulses that spread through the myocardium to coordinate each heartbeat.
Question 4: Which structure lines the joint cavity and is responsible for producing synovial fluid?
- Periosteum
- Articular cartilage
- Fibrous joint capsule
- Synovial membrane (Correct answer)
Correct answer: Synovial membrane
The synovial membrane is the inner lining of a joint capsule. It secretes synovial fluid, which reduces friction between articular surfaces and delivers nutrients to the avascular articular cartilage.
Question 5: In which layer of the epidermis are melanocytes primarily located?
- Stratum corneum
- Stratum granulosum
- Stratum spinosum
- Stratum basale (Correct answer)
Correct answer: Stratum basale
Melanocytes reside mainly in the stratum basale, the deepest layer of the epidermis. They produce melanin granules that are transferred to surrounding keratinocytes to absorb ultraviolet radiation and protect underlying tissues.
Question 6: The biceps femoris, semitendinosus, and semimembranosus collectively form which muscle group?
- Quadriceps femoris
- Hip adductors
- Gluteal group
- Hamstrings (Correct answer)
Correct answer: Hamstrings
These three muscles make up the hamstring group on the posterior thigh. Together they perform knee flexion and hip extension — actions highly relevant to gait analysis and soft-tissue work in massage therapy.
Massage and Bodywork Licensing Examination MBLEx Anatomy and Physiology 1
Which bone forms the posterior portion of the hard palate?