If the atomic number of an element is 27 and the mass number is 60, how many neutrons does the atom have?
A. 33
B. 60
C. 27
D. 87
Answer: A
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Which of the following is NOT a correct matching of a fetal structure with what it becomes at birth?
A) foramen ovale?fossa ovalis B) ductus venosus?ligamentum venosum C) ductus arteriosus?ligamentum teres D) umbilical arteries?medial umbilical ligaments
An advantage of innate immunity is ________
A) its barriers that prevent pathogens from entering into the body B) the specificity of its individual cells which specialize in the removal on one type of antigen C) the numerous steps in the activation of its cells that can prevent autoimmune disease D) the use of antibodies to cause cell lysis and kill invading cells
A direct connection between arteries is called a/an
A. auricle. B. sulcus. C. sinus. D. anastamosis.
Women have a tendency to retain water during part of the menstrual cycle because estrogen mimics the action of what?
A) Atrial natriuretic hormone B) Prolactin C) Aldosterone D) Oxytocin E) ADH