How does the muscular system contribute to osteoporosis?
A. Pain following injury helps prevent further injury.
B. Calcitonin is used to treat osteoporosis.
C. Lack of exercise reduces muscle stress on bone.
D. It is impacted by inadequate amounts of calcium and vitamin D in the diet.
E. Blood clotting starts repair process.
Answer: C
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Reabsorption of nutrients like glucose and amino acids takes place in the proximal convoluted tubule (PCT) via cotransporters that utilize secondary active transport
Which of the following would stop the reabsorption of glucose at the apical surface of the cells in the PCT? A) loss of Na+-K+ ATPase in the basolateral surface of PCT cells B) loss of K+ leak channels at the apical surface C) increasing Na+ concentration in the filtrate D) increasing Na+ in the interstitial fluid
Cardiac muscle tissue makes up all of the following portions of the heart except
A. the chordae tendineae. B. the trabeculae carneae. C. the myocardium of the walls of the heart chambers. D. the papillary muscles. E. the pectinate muscles.
Urine concentration and volume depend on water reabsorption in the ________.
A. ascending loop of Henle B. distal convoluted tubule only C. descending loop of Henle D. proximal convoluted tubule E. distal convoluted tubule and collecting ducts
Both the American horned lizards (Phyrnosoma, Phrynosomatidae) and the Australian thorny devil (Moloch horridus, Agamidae) eat ants almost exclusively
Suggest an explanation for the convergence of ant-eating specialists in these two families on a short-legged, stocky body form and a spine-covered body.