Would you expect to see changes in blood levels of the hormones calcitonin and PTH as a result of vitamin D3 deficiency? Explain
A person deficient in vitamin D3 would not be able to absorb calcium effectively from the digestive tract, leading to a shortage of calcium in the blood. To maintain homeostasis, the decrease in blood calcium would trigger the release of PTH. The PTH, in turn, would stimulate osteoclasts to release enough calcium from the bone to maintain proper calcium levels in the blood. Levels of calcitonin would decrease, because release of this hormone is triggered by high blood calcium levels.
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The bone-resorbing cells are called:
a. osteoclasts b. osteocytes c. osteoblasts d. chondrocytes
Regarding the location of the categorical and representational hemispheres in the brain,Regarding the location of the categorical and representational hemispheres in the brain,
A) the left hemisphere often controls complex motor patterns in artists and musicians. B) some individuals have no hemispheric specialization. C) there may be a link between handedness and sensory and spatial abilities. D) right-handed people always have the same pattern of hemispheric specialization.
Fibers of the vagus nerve end very near or within their target organs.
Answer the following statement true (T) or false (F)
Cellular respiration requires oxygen and glucose; in addition to producing energy, it produces water and
A. lactic acid B. carbon dioxide C. pyruvic acid D. fatty acids