Which of the following is true about epithelia?
A) Simple epithelia are commonly found in areas of high abrasion.
B) Stratified epithelia are associated with filtration.
C) Endothelium provides a slick surface lining all hollow cardiovascular organs.
D) Pseudostratified epithelia are commonly keratinized.
C) Endothelium provides a slick surface lining all hollow cardiovascular organs.
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Cells with similar functions aggregate into organelles.
Answer the following statement true (T) or false (F)
Pernicious anemia caused by a lack of intrinsic factor is specifically treated by
A) oral doses of iron. B) injections of iron. C) oral doses of vitamin B12. D) injections of vitamin B12. E) blood transfusion.
An ovulating oocyte is actually activated by hormones about ________ days before ovulation.
A) 14 B) 28 C) 85 D) 110
How does the integumentary system contribute to osteoporosis?
A. Lack of exposure to sunlight increases calcitonin secretion leading to reduced calcium storage in the bones. B. Decreased estrogen levels following menopause contribute to the disease. C. Lack of exposure to sunlight reduces vitamin D production and decreases calcium absorption. D. Estrogen produced in the dermis reduces calcium excretion in the kidneys. E. Calcium ions released from the bones are excreted through sweat.