Which of the following describes a way that breast cancer influences the physiology of the body?
A. Tumor growth that disrupts the ducts leading to the nipples may result in discharge leaking from the breasts.
B. Breast cancer may cause fatigue and a lack of energy.
C. The lymph nodes underneath the arms may become swollen and painful to touch, indicating the cancer has invaded them.
D. Lumps may be found in breast tissue as tumors form and grow.
E. Metastasis to the bones of the body can cause bone pain and easy fracturing.
F. All of these choices are correct.
Answer: F
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Cell extension involves
A. loss of water. B. low acidic condition. C. enzymes that produce polysaccharides. D. expansion of cellulose microfibrils. E. water leaving the central vacuole.
Totipotent nuclei are capable of:
a. controlling the expression of other genes in the nucleus. b. directing normal development of an organism. c. causing cells to lose the ability to differentiate. d. undergoing unlimited nuclear divisions. e. stopping the cell cycle at will
Vitamin D includes a group of steroid compounds that are converted to the steroid calcitriol in human kidneys
Calcitriol is a circulating steroid hormone that binds to Vitamin D receptors and the hormone binding to the Vitamin D steroid hormone receptor results in heterodimerization with a retinoic acid receptor and eventual regulation of calcium and phosphate in the blood stream. Which of the following DNA sequences is a likely HRE for Vitamin D receptor binding? A. NAGAACANNNTCAGCAN B. NAGGTCNNNATTTTAN C. NNTCCAGTTGACCTNN D. NNAGGTCANNNAGGACANN
An atom that has lost electrons is a
A. cation. B. neutral atom. C. molecule. D. anion.