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10 multiple-choice questions and 90 flashcards on Skeletal System, about 7% of the HS Anatomy & Physiology bank. Every one carries a written rationale.
Skeletal System is one of 13 chapters in CoStudy's HS Anatomy & Physiology bank, and it holds 10 of the bank's 150 multiple-choice questions — roughly 7% of the total. That proportion is not arbitrary: chapters follow the certifying body's published exam outline, and the number of questions in each is set by that domain's published weight, so the share of your practice time this chapter takes matches the share of the real exam it accounts for.
Studying by chapter is worth doing once you have a diagnostic score. A single overall percentage tells you whether you are close; it does not tell you which domain is dragging. Working a weak chapter in isolation, and re-testing it in isolation, is the fastest way to move a score that has stalled — and it is why the mock exams in CoStudy report by domain rather than as one number.
4 questions drawn from this chapter, with the full rationale shown — the controlling principle behind the right answer, and why each wrong option tempts and fails.
Which bone is part of the axial skeleton, NOT the appendicular skeleton?
Answer: C — Sternum
C) Sternum is part of the rib cage → axial. B) Femur is a lower-limb bone → appendicular. A) Clavicle is part of the pectoral girdle → appendicular. D) Humerus is an upper-limb bone → appendicular.
Which part of the brain coordinates movement, balance, and motor learning?
Answer: B — Cerebellum
The cerebellum coordinates voluntary motor activity, balance, and fine motor learning. The cerebrum handles higher cognition; medulla controls vital functions.
Which type of muscle tissue is striated, branched, and involuntary?
Answer: C — Cardiac muscle
Cardiac muscle (found only in the heart) is striated like skeletal muscle but branched, with intercalated discs, and is involuntary.
Insulin, which lowers blood glucose, is produced by which organ?
Answer: B — Pancreas
Beta cells in the pancreatic islets of Langerhans secrete insulin; alpha cells secrete glucagon (which raises blood glucose).
4 cards from the 90 in this chapter.
Foot — identify the highlighted tarsal bone.
Cuboid — cube-shaped tarsal in the lateral midfoot, between the calcaneus and the 4th/5th metatarsals. Forms the lateral longitudinal arch. Grooves on its plantar surface transmit the peroneus longus tendon.
Hand — identify the highlighted carpal bone (distal row).
Hamate — the medial (pinky-side) carpal of the distal row. Has a distinctive hook (hamulus) on its palmar surface, which forms part of the ulnar tunnel. Articulates with the fourth and fifth metacarpals. Hook fractures are seen in golf and baseball injuries.
Identify the highlighted structures.
Metatarsals (5 per foot) form the sole. Phalanges (14 per foot) are the toes: the great toe (hallux) has 2; each other toe has 3. Total foot bones per side: 7 tarsals + 5 metatarsals + 14 phalanges = 26.
Identify the highlighted region of the spine.
Thoracic vertebrae — 12 bones (T1–T12), each articulating with a pair of ribs. Long, downward-pointing spinous processes.
These are a sample. The full Skeletal System chapter runs 100 items with per-chapter progress tracking, on the web and in the iOS app.
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