Close examination of an organ reveals a lining of several layers of cells. The layers do not contain any blood vessels and one surface of the cells is open to the internal cavity of the organ. This tissue is probably
A) epithelium.
B) muscle tissue.
C) connective tissue.
D) neural tissue.
E) fat tissue.
Answer: A
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Thyroid hormone synthesis involves secretion of a glycoprotein called ___________ by the follicular cells
A. colloid B. thyroxine C. triiodothyronine D. thyroglobulin E. tetraiodothyronine
Which muscle is an adductor of the thigh and attaches to both the pubis and ischium?
A. Adductor longus B. Adductor magnus C. Adductor brevis D. Pectineus E. Gracilis
Copying genetic information from DNA into RNA is called ________; using the information contained in mRNA to make a polypeptide is called ________.
A. DNA translation; RNA transcription B. DNA replication; translation C. translation; transcription D. transcription; translation E. DNA duplication; transcription
Arrange the following in correct order
(1) cotransport molecule binds to sodium and glucose (2) establish sodium concentration gradient between tubular cells and tubular lumen (3) sodium and glucose moved into tubular cell (4) active transport of sodium from tubular cells to interstitial area A. 2, 1, 3, 4 B. 4, 2, 1, 3 C. 1, 3, 4, 2 D. 2, 4, 1, 3 E. 1, 2, 3, 4