Factors in the duodenum influence the rate of gastric emptying
Indicate whether the statement is true or false
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CCK causes relaxation of the sphincter of Oddi
Indicate whether the statement is true or false
An atom has an atomic number of 19 and a mass number of 39. This atom will have
A. 19 neutrons. B. 39 neutrons. C. 20 electrons. D. 20 neutrons. E. 58 neutrons.
Skin cells that undergo random changes as a person ages provide an example of a(n) _____ mutation.?
A) ?chromosomal B) ?gene C) ?somatic D) ?inherited
Sexual differentiation of the embryo is normally determined by
A. the number of chromosomes, with males having 22 pairs and females having an extra pair of XX chromosomes. B. the presence of two X chromosomes, which causes the primordial testes to degrade. C. hormones produced by the placenta. D. the presence of one Y chromosome, which causes the primordial ovaries to degrade. E. the presence of the Y chromosome, which directs the undifferentiated gonads to develop into testes (when there is one X chromosome present as well).