Bio 254 Exam 2 Questions & Answers(RATED A)

Compact bone - ANSWERmade of heavy osteons, yellow marrow, weight barring and resists compression Spongy bone - ANSWERmade of light trabeculae, red bone marrow, reduces weight and is slightly flexible yellow marrow - ANSWERtriglyceride storage red marrow - ANSWERhematopoiesis, half is converted into yellow marrow with maturity lamellae - ANSWERrings around the central canal, sites of lacunae illium, ischium, pubis - ANSWERwhat are the three bones that form the hip bone osteoclasts - ANSWERbreak down bone osteoblast - ANSWERbone-forming cell temperature regulation, protection, support, mineral storage, movement, attachment site for muscles - ANSWERwhat is the function of the skeletal system growth hormone - ANSWERwhat hormone stimulates osteoblast activity promoting bone formation sarcoplasmic reticulum (SR) - ANSWERstores calcium essential for muscle contractions transverse tubules - ANSWERconducts the action potential with sodium to stimulate calcium to release Sarcolemma - ANSWERplasma membrane of a muscle fiber sarcoplasma - ANSWERcytoplasm of a muscle cell sarcomere - ANSWERshortens during muscle contractions causing the sliding filiment model z-line - ANSWERseparates sacromeres from z-line to z-line