What thin membrane, continuous with the epiblast layer, secretes fluid to bathe the embryo?
A. Chorion
B. Amnion
C. Yolk sac
D. Corona radiata
B
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Which of the following formed elements do not have chromosomes?
A. erythrocytes B. reticulocytes C. erythroblasts D. erythrocytes and reticulocytes E. erythrocytes, reticulocytes and erythroblasts
There are three types of skin cancers. Which one(s) are derived from epithelial cells of the epidermis?
a. squamous cell carcinoma b. basal cell carcinoma c. both types of carcinoma (basal cell and squamous cell) d. melanoma
Which of the following is most likely to be an elastic artery?
A. the ascending aorta B. the coronary arteries C. the right internal thoracic artery D. the parietal arteries E. None of the above is classified as an elastic artery.
Which portion of the nephron reabsorbs most of the important nutrients, such as glucose and amino acids as well as any plasma proteins?
proximal convoluted tubule (PCT) glomerulus nephron loop distal convoluted tubule (DCT)