Which of the following statements about calcium homeostasis is FALSE? * PTH stimulates calcium uptake by bones The parathyroid gland secretes PTH in response to low calcium levels. The thyroid gland secretes calcitonin in response to high blood calcium levels. Calcitonin targets bone cells.. Calcitonin and PTH are antagonistic hormones (have opposing functions)..

Which of the following statements about calcium homeostasis is FALSE? * PTH stimulates calcium uptake by bones The parathyroid gland secretes PTH in response to low calcium levels. The thyroid gland secretes calcitonin in response to high blood calcium levels. Calcitonin targets bone cells.. Calcitonin and PTH are antagonistic hormones (have opposing functions)..

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter18: Principles Of Endocrinology; The Central Endocrine Glands

Section: Chapter Questions

Problem 5TAHL

See similar textbooks

Similar questions

Which cause-and-effect relationship is correct for a deficiency of active vitamin D (calcitriol)? bone formation is increased because vitamin D blocks the action of PTH on bone resorption osteoporosis, but not osteomalacia, is associated with a calcitriol deficiency because calcitriol synergizes with PTH in its action on bone hypophosphatemia occurs because of decreased intestinal phosphate absorption hypercalcemia occurs because of decreased intestinal calcium absorption
All of the following result in decreased calcium levels in the bloodstream except... calcitonin inhibition of osteoclasts pth stimulation of osteoclasts increased calcitonin levvels decreased pth or calcitriol levels
Why does the release of cortisol during the stress response have a negative effect on bone density? Cortisol increases serum calcium to fuel muscle contraction during the fight or flight responseCortisol reduces estrogen production and triggers early menopause Cortisol draws calcium out of the bones to increase serum calcium to fuel muscle contraction during the fight or flight response Cortisol decreases calcium to fuel muscle contraction during the fight or flight response
Betty has a calcium poor diet and because of her age (menopause years) she is concerned about becoming hypocalcemic (low blood calcium). Once the blood levels of calcium start dropping, the body will compensate for hypocalcemia. Receptors continually feed the brain’s hypothalamus (blood-calcium regulatory center) information on calcium blood levels. The parathyroid gland will be stimulated to release parathyroid hormone (PTH). PTH will stimulate osteoclast cells to break down bone and release the stored calcium to the blood, raising the calcium blood level. a. What is the stimulus?b. What is the control center?c. Identify the control center’s response to the stimuli?d. Does the response stop/reverse the stimuli or enhance the stimuli?e. Is the body’s response a negative or positive feedback?
Draw a negative feedback loop for blood calcium regulation. Falling calcium level signals release of parathyroid hormone from the parathyroid glands. Calcium is released from bones, increased uptake by digestive system. Rising calcium level signals release of calcitonin from the thyroid. Blood calcium is taken up into bone tissue.
What are the Hormones that regulate calcium and phosphate homeostasis: parathyroid hormone, calcitonin, 1,25 (ОН)2D3. The influence of other hormones in calcium metabolism (glucocorticoids, somatotropin. Thyroid hormones, estrogens, insulin)
Explain how calcitonin, parathyroid hormone, and vitamin D are involved in maintaining blood calcium levels. What happens when too little or too much parathyroid hormone is secreted?
explain the role of the calcitonin and parathyroid hormone in calcium homeostasis
Of the following, could you please assist the answer for when blood calcium levels are low?? osteoblast activity increases. ostoclast activity increases. calcitonin secretion increases. calcium absorption is reduced. bones produce more bone tissue.
Calcium is a mineral that is important for many cells of the body. It is required for bone strength. It is also necessary for muscle contraction and the proper functioning of neurons. When you eat food that provides you with calcium, there will temporarily be an excess of it in the bloodstream. This is sensed by the thyroid gland, which is located in your lower neck region. The thyroid responds by secreting calcitonin into your bloodstream. The calcitonin signals to your bones to absorb and deposit calcium. Sometimes there is so much calcium that your bones cannot absorb it all, so calcitonin also signals to your kidneys to absorb some calcium and filter it out of the blood and add it too your urine where it can be excreted. Once calcium levels drop to the set point, calcitonin secretion stops. On the other hand, if calcium levels in the blood drop too far below the set point, there is a danger that the muscles and neurons will not have enough to function. A different gland called the…
Indicate of the statements are TRUE or FALSE. Statements TRUE FALSE Production of blood cells is NOT a function of skeletal system. Thyroid hormone may produce either osteogenesis or osteolysis. Bone matrix is composed primarily of Calcium and Magnesium which maybe withdrawn in small amounts as needed elsewhere in the body. Remodelling of bone is a function of osteoclasts and osteoblasts. A combination of the hormone, adrenal cortisol, and the bone cell, osteoclast, may result in osteoporosis. The addition of bone to its outer surface resulting in growth in diameter is called apposional growth. Once an individual reaches skeletal maturity, the bones undergo years of metabolic rest. Mitosis resulting in elongation of bone occurs at the articular cartilage. Most bones of the body are formed by intramembranous ossification.
Explain the function and regulation of parathyroid hormone. - Contrast in detail the action of calcitonin and parathyroid hormone in calcium homeostasis.