Endocrine glands
A. lack ducts and secrete their products onto the skin surface.
B. possess short ducts and secrete their products directly onto the skin surface.
C. secrete mucus directly into a body cavity.
D. possess ducts to secrete their products into the bloodstream or into interstitial fluid.
E. lack ducts and secrete their products into the bloodstream or into interstitial fluid.
Answer: E
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The segment of the nephron that is impermeable to H2O even in the presence of vasopressin is the
a. proximal tubule b. ascending limb of the loop of Henle c. descending limb of the loop of Henle d. distal tubule e. collecting tubule
Vocabulary TermsPart complete Match these vocabulary terms to their meanings.
The rubbery matrix of cartilage is secreted by ________, whereas ________ produce the fibers and ground substance that form the matrix of fibrous connective tissue.
A. chondroblasts; fibroblasts B. adipocytes; plasma cells C. osteocytes; chondroblasts D. mast cells; fibroblasts E. chondroblasts; plasma cells
All filters are ________, meaning only some substances pass through, mainly due to the size of the openings in the filter.
A. creative B. selective C. retroactive D. peritoneal