Which of the following conditions may cause low active Vitamin D levels? Select one: a. An increase in Vitamin D absorption at the intestines has overwhelmed the homeostasis of vitamin production at the kidneys. b. Melanin production has increased due to sun exposure, reducing Vitamin D activation. c. Liver dysfunction has reduced the conversion of cholecalciferol to the intermediate for calcitriol production.
Added by Laura L.
Step 1
- An increase in Vitamin D absorption at the intestines has overwhelmed the homeostasis of vitamin production at the kidneys. - This statement suggests that there is too much Vitamin D being absorbed, which could lead to high, not low, Vitamin D levels. Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 96 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Vitamin D contributes to bone health by maintaining blood calcium and phosphorus levels within the normal range. Unlike any other vitamin, the body can produce vitamin D from exposure to ultraviolet light. From the list below, choose all the correct statements about vitamin D. Select all that apply. a. The liver converts cholecalciferol into the active form of vitamin D. b. Factors that enhance UV-light-mediated vitamin D synthesis include living north of 37° latitude, having darker skin pigmentation, and being obese. c. Vitamin D promotes absorption of calcium and phosphorus from the small intestine. d. Vitamin D decreases calcium reabsorption by the kidneys. e. Vitamin D is necessary for the normal calcification of bone.
Sri K.
The disease in adults from vitamin D deficiency is rickets osteoporosis osteomalacia osteomyelitis The parathyroid hormone causes what change in bone in order to increase calcium in the blood? increases catabolism of the bone Which of the following organs are involved in the production of active vitamin D in the body? skin liver kidney all of the above 10. Which of the following could be the cause of hypokalemia (low blood potassium)? vomiting excess sweating potassium-wasting diuretics all of the above 11. This mineral is involved in more than 300 enzymatic reactions in the body. It is involved in ADP an ATP in energy metabolism. It probably stabilizes nervous and vascular tissue and it used in eclampsia as an anticonvulsant. phosphorus calcium magnesium sulfur 12. One of the most common causes of hypercalcemia, besides cancer, is this syndrome, caused by ingestion of excess calcium and absorbable alkali. irritable bowel syndrome milk alkali syndrome tetany phosphorus syndrome
Madhur L.
Part 1. Peggy is a 68-year-old woman who has worked long hours indoors her entire life. A recent checkup indicated that she was severely deficient in vitamin D due to inadequate intake and a lack of sun exposure. Following these findings, the doctor diagnosed Peggy with a (1) primary deficiency of vitamin D, resulting in (2) osteomalacia or poor bone mineralization. Her doctor explained that because of this vitamin deficiency, Peggy was not able to maintain appropriate levels of calcium, which had resulted in hyperparathyroidism. In this example, hyperparathyroidism (3) is a vitamin D deficiency disease. answer choices to fill in the blank: 1. (A) primary or (B) secondary 2. (A) rickets or (B) osteomalacia 3. (A) is or (B) is not Part 2. In order for the synthesis of vitamin D to occur, a series of steps are necessary and any disruption in this process can result in a deficiency of vitamin D. With this in mind, choose the situations or conditions that could contribute to a vitamin D deficiency. Choose all that apply. (a) Living in a region without a lot of sunlight (b) Having a lighter skin pigmentation (c) Limited or no use of sunscreen outdoors (d) Having liver disease
Adi S.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD