During the third week of development, what is the result of gastrulation?
A. It converts the epiblast into a hypoblast.
B. It converts the hypoblast into endoderm.
C. It forms the primitive streak.
D. It forms the neural tube.
E. It forms the amniotic cavity.
B. It converts the hypoblast into endoderm.
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The largest of the salivary glands is the:
a. sublingual gland b. parotid gland c. submaxillary gland d. submandibular gland
There is not a link between autism and ADHD and the environment.
a. true b. false
Under what conditions would the skin produce sweat and experience cutaneous vasodilation?
A) upon decrease in body temperature B) upon increase in body temperature C) upon exposure to UV radiation D) due to lack of oxygen
Imagine yourself sitting in an awkward position in an uncomfortable chair that is depriving part of your leg from normal blood flow. This deprivation of adequate perfusion will result in what sort of local changes in your leg?
A. Increases in oxygen and potassium will cause vasodilation. B. Decreases in oxygen and potassium will cause vasoconstriction. C. Decreases in carbon dioxide and hydrogen ions will cause vasodilation. D. Buildup of carbon dioxide and hydrogen ions will cause vasoconstriction. E. Buildup of carbon dioxide and hydrogen ions will cause vasodilation.