please answer 48-5048. The efficiency of calcium absorption across the gut epithelium is increased in response toa) vitamin Cb) 1,25-dihydroxyvitamin Dc) aldosteroned) growth hormone 49. Bone resorptiona) can be inhibited and bone formation stimulated by the proper amount of PTH.b) can be increased by high levels of PTH secretionc) can be stimulated by inflammatory mediators such as Interleukin-1.d) All the above (a, b and c) are correct. 50. Genetic informationa) is carried from generation to generation in DNAb) is subject to mutation that may alter the function of specific genesc) is subject to epigenetic alterations in gene expression that may occur as the result of environmental influencesd) All the above (a, b and c) are correct.

Answered: The efficiency of calcium absorption…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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please answer 48-50

48. The efficiency of calcium absorption across the gut epithelium is increased in response to

a) vitamin C
b) 1,25-dihydroxyvitamin D
c) aldosterone
d) growth hormone

49. Bone resorption

a) can be inhibited and bone formation stimulated by the proper amount of PTH.
b) can be increased by high levels of PTH secretion
c) can be stimulated by inflammatory mediators such as Interleukin-1.
d) All the above (a, b and c) are correct.

50. Genetic information

a) is carried from generation to generation in DNA
b) is subject to mutation that may alter the function of specific genes
c) is subject to epigenetic alterations in gene expression that may occur as the result of environmental influences
d) All the above (a, b and c) are correct.

Expert Solution

Step 1

Calcium is absorbed in the mammalian small intestine by two general mechanisms:

i. a transcellular active transport process,

ii. passive process that functions throughout the length of the intestine.

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