Which of the following occurs when a hormone binds to a nuclear receptor?
A. activation of cyclic AMP
B. activation of mRNA synthesis
C. increased lipid synthesis by ribosomes
D. opens membrane channels
E. alters membrane permeability
B
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Which of the following is not true of William Harvey?
A. He wrote about his work in the 1600s. B. He believed blood orbits the body similar to the way planets orbit the sun. C. He observed capillaries under the microscope. D. He measured cardiac output in a variety of animals. E. He experimentally demonstrated that blood returns to the heart after passing through the organs.
All axons in the PNS have a myelin sheath.
Answer the following statement true (T) or false (F)
Adaptive immunity involves skin, NK cells, and phagocytosis.
Answer the following statement true (T) or false (F)
All of the following are functions of the mucous membrane lining of the sinuses except which one?
A. Give resonance to voice B. Fill the sinus with air C. Warm the air D. Moisten the air