ESTUDYR
BIOL102-LO5: STUDY SET MOST TESTED QUESTIONS AND
ANSWERS GRADED A+ WITH RATIONALES
1. Abduction — Which definition is correct?
A. Movement in the sagittal plane that decreases a joint angle.
B. Movement in the coronal plane that moves a limb medially toward the body.
C. Movement in the transverse plane rotating the limb inward.
D. Movement in the coronal plane that moves a limb laterally away from the body;
spreading of the fingers. ✔
E. Movement that brings the thumb to the fingertips.
Rationale: Abduction moves a limb away from the midline; finger spreading is
abduction.
2. Acetabulum — What is the acetabulum?
A. The head of the femur.
B. The pubic symphysis.
C. A small notch on the sacrum.
D. Large, cup-shaped cavity on the lateral hip bone formed by ilium, pubis, and
ischium. ✔
E. The socket for the humeral head.
Rationale: The acetabulum is the hip socket receiving the femoral head.
3. Acromial end of the clavicle — This refers to:
A. Medial clavicular articulation with sternum.
B. Midshaft of clavicle where muscles attach.
C. Lateral end of clavicle that articulates with the acromion of scapula. ✔
D. The inferior surface of the clavicle.
E. The notch for subclavian vessels.
Rationale: The acromial (lateral) end meets the scapula at the AC joint.
4. Acromial process — Also called:
A. Glenoid cavity.
B. Coracoid process.
C. Spine of scapula.
D. Acromion of the scapula. ✔
E. Tubercle of humerus.
Rationale: Acromial process is the acromion, the prominent scapular tip.
,ESTUDYR
5. Acromioclavicular joint — What is this joint?
A. Sternum to clavicle articulation.
B. Humerus to scapula socket.
C. Articulation between scapular acromion and acromial end of clavicle. ✔
D. Glenohumeral joint.
E. Coracoclavicular ligament.
Rationale: AC joint connects scapula’s acromion to clavicle.
6. Acromion — Best description:
A. The clavicular notch of sternum.
B. The coracoid notch.
C. Flattened bony process extending laterally from scapular spine forming shoulder
tip. ✔
D. The medial border of scapula.
E. Part of the humeral head.
Rationale: Acromion is the bony shoulder tip projection of scapula.
7. Adduction — Which defines adduction?
A. Movement in sagittal plane increasing joint angle.
B. Movement in the coronal plane that moves a limb medially toward or across the
midline; bringing fingers together. ✔
C. Rotational movement.
D. Movement of thumb to fingers.
E. Upward movement of scapula.
Rationale: Adduction moves toward the body midline.
8. Amphiarthrosis — What is an amphiarthrosis?
A. A freely movable joint.
B. An immobile suture.
C. A ball-and-socket joint.
D. A slightly mobile joint. ✔
E. A synovial hinge.
Rationale: Amphiarthroses (e.g., intervertebral discs) allow limited movement.
9. Anatomical neck (humerus) — The anatomical neck is:
A. The tubular shaft of humerus.
B. The groove for radial nerve.
C. Line around the outside margin of the humeral head. ✔
D. Distal articular surface.
, ESTUDYR
E. The site of surgical neck fractures.
Rationale: Anatomical neck encircles humeral head; surgical neck is distal to it.
10. Ankle joint — Which bones form the ankle joint superiorly and inferiorly?
A. Femur and tibia.
B. Tibia + fibula superiorly with calcaneus inferiorly.
C. Talus inferiorly with distal tibia (medial malleolus) and distal fibula (lateral
malleolus) superiorly. ✔
D. Navicular and cuboid.
E. Talus with femur.
Rationale: Talus articulates with distal tibia and fibula to form ankle (tibiotalar joint).
11. Anterior cruciate ligament (ACL) — Primary role:
A. Prevents posterior tibial displacement.
B. Connects femur to patella.
C. Intracapsular ligament resisting hyperextension and anterior tibial translation. ✔
D. Limits ankle inversion.
E. Stabilizes hip joint.
Rationale: ACL resists anterior movement of tibia and hyperextension of knee.
12. Anterior inferior iliac spine (AIIS) — Location?
A. Superior most point of ilium.
B. Posterior ilium margin.
C. Small bony projection on anterior ilium below anterior superior iliac spine. ✔
D. Ischial tuberosity.
E. Pubic symphysis.
Rationale: AIIS lies inferior to ASIS on anterior iliac margin.
13. Anterior superior iliac spine (ASIS) — Best description:
A. Posterior rim of ilium.
B. Rounded anterior end of iliac crest.
C. Ischial spine.
D. Rounded, anterior end of the iliac crest. ✔
E. Insertion for hamstrings.
Rationale: ASIS is a palpable anterior iliac crest landmark.
14. Appendicular skeleton — Includes:
A. Skull and vertebrae only.
B. Sternum and ribs only.
C. All bones of upper & lower limbs plus girdles attaching limbs to axial skeleton. ✔
BIOL102-LO5: STUDY SET MOST TESTED QUESTIONS AND
ANSWERS GRADED A+ WITH RATIONALES
1. Abduction — Which definition is correct?
A. Movement in the sagittal plane that decreases a joint angle.
B. Movement in the coronal plane that moves a limb medially toward the body.
C. Movement in the transverse plane rotating the limb inward.
D. Movement in the coronal plane that moves a limb laterally away from the body;
spreading of the fingers. ✔
E. Movement that brings the thumb to the fingertips.
Rationale: Abduction moves a limb away from the midline; finger spreading is
abduction.
2. Acetabulum — What is the acetabulum?
A. The head of the femur.
B. The pubic symphysis.
C. A small notch on the sacrum.
D. Large, cup-shaped cavity on the lateral hip bone formed by ilium, pubis, and
ischium. ✔
E. The socket for the humeral head.
Rationale: The acetabulum is the hip socket receiving the femoral head.
3. Acromial end of the clavicle — This refers to:
A. Medial clavicular articulation with sternum.
B. Midshaft of clavicle where muscles attach.
C. Lateral end of clavicle that articulates with the acromion of scapula. ✔
D. The inferior surface of the clavicle.
E. The notch for subclavian vessels.
Rationale: The acromial (lateral) end meets the scapula at the AC joint.
4. Acromial process — Also called:
A. Glenoid cavity.
B. Coracoid process.
C. Spine of scapula.
D. Acromion of the scapula. ✔
E. Tubercle of humerus.
Rationale: Acromial process is the acromion, the prominent scapular tip.
,ESTUDYR
5. Acromioclavicular joint — What is this joint?
A. Sternum to clavicle articulation.
B. Humerus to scapula socket.
C. Articulation between scapular acromion and acromial end of clavicle. ✔
D. Glenohumeral joint.
E. Coracoclavicular ligament.
Rationale: AC joint connects scapula’s acromion to clavicle.
6. Acromion — Best description:
A. The clavicular notch of sternum.
B. The coracoid notch.
C. Flattened bony process extending laterally from scapular spine forming shoulder
tip. ✔
D. The medial border of scapula.
E. Part of the humeral head.
Rationale: Acromion is the bony shoulder tip projection of scapula.
7. Adduction — Which defines adduction?
A. Movement in sagittal plane increasing joint angle.
B. Movement in the coronal plane that moves a limb medially toward or across the
midline; bringing fingers together. ✔
C. Rotational movement.
D. Movement of thumb to fingers.
E. Upward movement of scapula.
Rationale: Adduction moves toward the body midline.
8. Amphiarthrosis — What is an amphiarthrosis?
A. A freely movable joint.
B. An immobile suture.
C. A ball-and-socket joint.
D. A slightly mobile joint. ✔
E. A synovial hinge.
Rationale: Amphiarthroses (e.g., intervertebral discs) allow limited movement.
9. Anatomical neck (humerus) — The anatomical neck is:
A. The tubular shaft of humerus.
B. The groove for radial nerve.
C. Line around the outside margin of the humeral head. ✔
D. Distal articular surface.
, ESTUDYR
E. The site of surgical neck fractures.
Rationale: Anatomical neck encircles humeral head; surgical neck is distal to it.
10. Ankle joint — Which bones form the ankle joint superiorly and inferiorly?
A. Femur and tibia.
B. Tibia + fibula superiorly with calcaneus inferiorly.
C. Talus inferiorly with distal tibia (medial malleolus) and distal fibula (lateral
malleolus) superiorly. ✔
D. Navicular and cuboid.
E. Talus with femur.
Rationale: Talus articulates with distal tibia and fibula to form ankle (tibiotalar joint).
11. Anterior cruciate ligament (ACL) — Primary role:
A. Prevents posterior tibial displacement.
B. Connects femur to patella.
C. Intracapsular ligament resisting hyperextension and anterior tibial translation. ✔
D. Limits ankle inversion.
E. Stabilizes hip joint.
Rationale: ACL resists anterior movement of tibia and hyperextension of knee.
12. Anterior inferior iliac spine (AIIS) — Location?
A. Superior most point of ilium.
B. Posterior ilium margin.
C. Small bony projection on anterior ilium below anterior superior iliac spine. ✔
D. Ischial tuberosity.
E. Pubic symphysis.
Rationale: AIIS lies inferior to ASIS on anterior iliac margin.
13. Anterior superior iliac spine (ASIS) — Best description:
A. Posterior rim of ilium.
B. Rounded anterior end of iliac crest.
C. Ischial spine.
D. Rounded, anterior end of the iliac crest. ✔
E. Insertion for hamstrings.
Rationale: ASIS is a palpable anterior iliac crest landmark.
14. Appendicular skeleton — Includes:
A. Skull and vertebrae only.
B. Sternum and ribs only.
C. All bones of upper & lower limbs plus girdles attaching limbs to axial skeleton. ✔
