Physiology Quiz 4 05/04/2016 Part A Bone is the most important storehouse in the body for: iron. chlorine. calcium. sodium. [AdsenseImage] Charlie has a break in the shaft of his thigh bone. He broke the: epiphyseal plate. diaphysis. epiphysis. articular cartilage. The function of yellow bone marrow is: hematopoiesis. mineral storage. acid-base homeostasis. triglyceride storage. What tissue serves as the model for bones formed during endochondral ossification? spongy bone compact bone hyaline cartilage fibrocartilage What term implies bone deposition via osteoblasts? resorption calcification keratinization degradation [AdsenseImage] Place the following steps of bone repair in the correct sequence. 1. The bone callus is remodeled and primary bone is replaced with secondary bone. 2. A hematoma fills the gap between bone fragments. 3. Osteoblasts built a new bone callus. 4. Fibroblasts and chondroblasts infiltrate the hematoma and a soft callus forms. 2, 4, 3, 1 3, 2, 4, 1 3, 2, 1, 4 2, 3, 4, 1 Bone deposition exceeds bone resorption when bones are stressed through compression or tension. True False Where should most of the potassium ions be located when a muscle cell is at rest? extracellular fluid sarcoplasmic reticulum cytosol of the muscle cell tranverse tubules (T-tubules) Place the following events of excitation in the correct order. 1) ion channels on the sarcolemma open and sodium ions enter the muscle fiber 2) the entry of sodium ions into the muscle fiber depolarizes the sarcolemma locally 3) acetylcholine is released from vesicles in the motor neuron into the synaptic cleft 4) an action potential arrives at the axon terminal of a motor neuron 5) acetylcholine binds to ligand-gated sodium ion channels in the motor end plate 2, 4, 3, 5, 1 3, 4, 5, 1, 2 4, 5, 3, 2, 1 4, 3, 5, 1, 2 [AdsenseImage] The return of calcium ions to the sarcoplasmic reticulum during muscle relaxation decreases the calcium ion concentration in the cytosol. True False Through which ATP-generating mechanism can long-lasting muscle contractions be sustained? oxidative catabolism glycolysis creatine phosphate reaction anaerobic catabolism Which statement best describes the function of myoglobin? Myoglobin stores oxygen in muscle cells. Myoglobin is a source of ATP for muscles. Myoglobin catabolizes glycogen. Myoglobin hydrolyzes ATP. dfadsfdsfs Shady equipment operatorsHigh School 1957 vs 2016 – This is so true!!!
