The first trimester is a critical period for development because events in the first 12 weeks establish the basis for organ formation, a process called ________.
Fill in the blank(s) with the appropriate word(s).
organogenesis
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Each of the following is a function of the liver except
A) synthesis and secretion of bile. B) antibody production. C) synthesis of plasma proteins. D) inactivation of toxins. E) storage of glycogen and iron reserves.
The true ribs ________.
A. are not attached to the sternum B. are attached by cartilages to the costal cartilages of the ribs superior to them C. are attached directly to the sternum by the costal cartilages D. are attached directly to the sternum by dense regular connective tissue
When you scrape your skin, white blood cells arrive to fight infection. To slow down near the site of the cut, they use selectin, which provides traction. Since selectin helps white blood cells bind to a surface, they are part of a protein group known as
A. cellular adhesion molecules. B. cellular binding molecules. C. receptors. D. integral proteins.
In the body, 80% of all lymphocytes, a type of immune system cell, are thought to be present in the
A) mouth. B) small intestine. C) stomach. D) large intestine. E) appendix.