NCBTMB Applied Science and Anatomy 4 — Questions and Answers
Question 1: The rotator cuff consists of four muscles; which one is responsible for internal rotation of the humerus?
- Supraspinatus
- Infraspinatus
- Teres minor
- Subscapularis (Correct answer)
Correct answer: Subscapularis
The subscapularis originates on the anterior scapula and is the only rotator cuff muscle that internally rotates the humerus.
Question 2: Which anatomical plane divides the body into superior and inferior portions?
- Sagittal plane
- Frontal (coronal) plane
- Transverse (horizontal) plane (Correct answer)
- Oblique plane
Correct answer: Transverse (horizontal) plane
The transverse (horizontal) plane divides the body into upper (superior) and lower (inferior) sections.
Question 3: Which type of connective tissue forms tendons and ligaments?
- Loose areolar connective tissue
- Dense irregular connective tissue
- Dense regular connective tissue (Correct answer)
- Reticular connective tissue
Correct answer: Dense regular connective tissue
Dense regular connective tissue has collagen fibers arranged in parallel bundles, giving tendons and ligaments great tensile strength in one direction.
Question 4: What is the scientific term for the 'knee cap'?
- Fibula
- Patella (Correct answer)
- Tibia
- Talus
Correct answer: Patella
The patella is a sesamoid bone embedded in the quadriceps tendon that protects the knee joint and improves mechanical advantage.
Question 5: Which cranial nerve is responsible for the sensation of touch on the face?
- Facial nerve (CN VII)
- Trigeminal nerve (CN V) (Correct answer)
- Glossopharyngeal nerve (CN IX)
- Vagus nerve (CN X)
Correct answer: Trigeminal nerve (CN V)
The trigeminal nerve (CN V) provides sensory innervation to the face through its ophthalmic, maxillary, and mandibular branches.
Question 6: Which process describes the movement of a limb away from the midline of the body?
- Adduction
- Abduction (Correct answer)
- Flexion
- Circumduction
Correct answer: Abduction
Abduction is movement away from the body's midline, such as lifting the arm laterally away from the side of the body.
Question 7: The sinoatrial (SA) node, which initiates the cardiac cycle, is located in which heart chamber?
- Left atrium
- Right ventricle
- Right atrium (Correct answer)
- Left ventricle
Correct answer: Right atrium
The SA node is located in the posterior wall of the right atrium near the entrance of the superior vena cava and generates the heart's electrical impulse.
NCBTMB Applied Science and Anatomy 4
The rotator cuff consists of four muscles; which one is responsible for internal rotation of the humerus?