A) Permanent loss of all calcium B) Binding of a new ATP molecule C) A red blood cell collision D) […]

What covers the ends of bones at most synovial joints?

A) Epidermis B) A tendon sheath only C) Articular cartilage D) Lung pleura Answer: C Explanation: Smooth cartilage reduces friction […]

What does yellow bone marrow mainly store?

A) Oxygen gas B) Fat C) Stomach acid D) Chlorophyll Answer: B Explanation: Yellow marrow contains many fat cells. It […]

A) A nerve ending in skin B) A cylindrical structural unit arranged around a central canal C) A blood-clotting protein […]

A) A single red blood cell B) A type of bone cavity C) A plant root segment D) The repeating […]

A) Hinge joint B) Ball-and-socket joint C) Pivot joint D) Suture Answer: D Explanation: Skull bones meet at fibrous sutures. […]

A) Bone forming only from a blood clot B) Bone dissolving in acid C) A muscle becoming a tendon D) […]

A) Bone forming directly within embryonic connective tissue B) Cartilage first becoming an entire limb C) Only an adult fracture […]

A) It makes stomach acid B) It filters inhaled air C) It supplies chlorophyll D) It produces blood cell precursors […]

A) Digesting fats B) Filtering air C) Producing blood cells D) Secreting bile Answer: C Explanation: Hematopoiesis occurs in red […]