The papillary layer of the dermis is connective tissue heavily invested with blood vessels. The superficial surface has structures called:
A) dermal papillae.
B) hair follicles.
C) ceruminous glands.
D) reticular papillae.
A) dermal papillae.
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All but which one of the following compounds is an invertebrate phosphogen?
A) Phosphoarginine B) Phosphocreatine C) Phosphoglycocyamine D) Phospholambricine
How is alveolar air different than inspired air?
A. Alveolar air has a higher PN2 than inspired air. B. Alveolar air has a lower PCO2 than inspired air. C. Alveolar air has a higher PH2O than inspired air. D. Alveolar air has a higher PO2 than inspired air.
The first teeth to appear are the ________ teeth
A) provisional B) transitory C) transitional D) temporary E) deciduous
Which of the following statements is correct with respect to the sites of synthesis of B and T cells?
A) In bony fish, B cells are produced in the kidney or spleen. B) In most vertebrates, B cells are produced in body cells, but in different locations of the body. C) Jawless fish produce T cells in the thymus. D) Bony and cartilaginous fish produce T cells in the gill region, referred to as the thymoids.