How many oxygen molecules can bind to hemoglobin?
A. 1
B. 4
C. 100
D. limitless
E. none of the above
Ans: B. 4
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The chest wall is anatomically configured to contract inwardly, so that when the thorax is opened surgically its walls collapse
Indicate whether this statement is true or false.
The trigone of the bladder:
A) forms the boundaries of the internal urethral orifice. B) is a slight elevation of the internal posterior wall produced by the prostate. C) is the internal area demarcated by the internal urethral and ureteric orifices. D) is the extraperitoneal part of the external surface. E) is synonymous with the apex.
Which is greater?
A) osteoclast activity when calcitonin is present B) osteoclast activity when calcitonin is absent
Which vitamin deficiency is the most common worldwide?
A) Vitamin A B) Vitamin D C) Vitamin E D) Vitamin B6 (pyridoxine) E) Vitamin C