When are adult women least likely to be at risk of hypocalcemia (low blood calci

Question

When are adult women least likely to be at risk of hypocalcemia (low blood calcium concentration)? a. Lactation b. Pregnancy c. Removal of the parathyroid glands during thyroidectomy d. If daily diet contains at least 1000 mg of calcium e. Adequate exposure to UV radiation from the sun Pregnancy and lactation put women at risk of hypocalcemia because of the calcium demanded by ossification of the fetal skeleton and synthesis of milk. The leading cause of hypocalcemia tetany is accidental removal of the parathyroid glands during thyroid surgery. When your body needs to regulate the levels of Calcium _____ cells release RANKL. a. Osteoblast b. Osteoclast c. Cartilage PTH binds to receptors on the osteoblasts, stimulating them to secrete RANKL, which in turn raises the osteoclast population and promotes bone resorption. Osteoporosis is most common in women after menopause because of the lack of _____, which would otherwise inhibit _____. a. Dietary calcium: estrogen production b. Osteoblasts: osteoclast activity c. Parathyroid hormone: osteocyte activity d. Osteoblasts: Osteoclast activity e. Estrogen: Osteoblast activity Estrogen stimulates osteoblasts and adolescent growth: prevents osteoporosis A dilligent 17 year old teenager ensures he eats a healthy diet which includes at least _____ mg of calcium per day. His total calcium excretion in feces and urine is roughly _____ mg per day, while on average _____ % of his skeleton is replaced every. a. 25: 25: 50 b. 50: 50: 50 c. 75: 85: 25 d. 1000: 1000: 10 An overproduction of melanin could block UV preventing skin cancer but might inhibit Vitamin D3 Synthesis as well. a. True b. False Not sure If a person has been diagnosed with osteogenesis imperfecta then he most likely suffers from a lack of a. Adequate amount of phosphate in diet b. Adequate amount of calcium in diet c. Adequate amount of protein in diet d. Adequate amount of nucleic acids in diet

Explanation / Answer

Q25

c. removal of parathyroid during thyroidectomy --------------answer

Blood Ca2+ deficiency stimulates parathyroid hormone secretion, which leads to increased osteoclast activity.

explanation is correct

Q26

a. osteoblast --------------answer

explanation is correct

Q27

e. estrogen , osteoblast activity--------------answer

explanation is correct

===============================================================

29. true

Melanin

It is a protective pigment in skin, and blocking UV radiation from damaging DNA.

and potentially causing skin cancer

Q28

d. 1000,1000;10

Q30

Adequate amount of calcium in diet--------------answer

Osteogenesis imperfecta (OI) :

It is a complicatedand variable disorder.

Q25

c. removal of parathyroid during thyroidectomy --------------answer

Blood Ca2+ deficiency stimulates parathyroid hormone secretion, which leads to increased osteoclast activity.

explanation is correct

Q26

a. osteoblast --------------answer

explanation is correct

Q27

e. estrogen , osteoblast activity--------------answer

explanation is correct

===============================================================

29. true

Melanin

It is a protective pigment in skin, and blocking UV radiation from damaging DNA.

and potentially causing skin cancer

Q28

d. 1000,1000;10

Q30

Adequate amount of calcium in diet--------------answer

Osteogenesis imperfecta (OI) :

It is a complicatedand variable disorder.

1. Its major feature is a fragile skeleton.
2. It is caused by a mutation (change) in a gene that affects
3. bone formation,
4. bone strength
5. and
6. the structure of other tissues.

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