An allele that masks the effect of another is
A. dominant.
B. heterozygous.
C. homozygous.
D. recessive.
Answer: A
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The urethra and urinary bladder develop from a structure called the
A. cloaca. B. urethral bud. C. urogenital sinus. D. urachus. E. allantois.
Answer the following statements true (T) or false (F)
1. In the lymph node, biological filtration is accomplished by phagocytosis. 2. The immune system is different from most systems because it is made up of cells and molecules rather than large organs. 3. Inborn or innate immunity is an example of the body’s specific immunity. 4. The antibodies passed from the mother to the fetus before birth is an example of inherited immunity. 5. One of the things antibodies can do is to make phagocytosis more efficient.
The ascending limb of the loop of Henle
a. actively transports NaCl into the surrounding interstitial fluid b. is permeable to water in the presence of vasopressin c. is found in the renal cortex d. drains into the proximal tubule e. actively reabsorbs water from the filtrate
How much of the body's calcium resides within the ECF?
a. 0.1% b. 1% c. 10% d. 50% e. 99%