Musculoskeletal System Flashcards
6 cards from real Anatomy and Physiology practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Musculoskeletal System flashcards as text
What is the name of the cartilage found at the ends of long bones that cushions joints?
Answer: Articular cartilage
Articular cartilage (a type of hyaline cartilage) covers the ends of long bones in synovial joints, providing a smooth, low-friction surface.
Which muscle is the primary hip flexor?
Answer: Iliopsoas
The iliopsoas, formed by the iliacus and psoas major muscles, is the strongest and most important hip flexor.
What are the small projections on the surface of trabecular (spongy) bone called?
Answer: Trabeculae
Trabeculae are the needle-like or plate-like bony projections that form the lattice-work structure of spongy bone, reducing weight while maintaining strength.
Which structure connects the two bones of a synovial joint and provides stability?
Answer: Ligament
Ligaments are dense fibrous connective tissue bands that connect bone to bone across a joint, providing structural stability.
In the sliding filament theory of muscle contraction, which ion is released from the sarcoplasmic reticulum to trigger contraction?
Answer: Calcium (Ca²⁺)
Calcium ions released from the sarcoplasmic reticulum bind to troponin, causing a conformational change that exposes actin binding sites for myosin cross-bridges.
What is the term for the fibrous membrane covering the outer surface of most bones?
Answer: Periosteum
The periosteum is a dense fibrous membrane covering the outer surface of bone, containing osteoblasts essential for bone growth and repair.