The membrane structures that respond to chemical stimuli to produce sweet, bitter, and umami sensations are called
A) gustatory hairs.
B) chemically-gated ion channels.
C) voltage-regulated ion channels.
D) G proteins.
E) papillae.
D
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Answer the following statement(s) true (T) or false (F)
1. Endocrine glands release their hormones into the blood via a duct system. 2. Hormones are not very specific about the cells they affect. 3. With increasing age, the thymus increases in size. 4. Testosterone is a gonadotropin.
Each segment of lung tissue is divided into a number of ____ wrapped in elastic connective tissue with a lymphatic, an arteriole, a venule, and bronchioles from a terminal bronchiole
a. alveolus b. meatus c. septa d. lobules
Under the influence of cytokines from helper T cells, B cells enlarge and divide, forming
A. plasma cells. B. helper cells. C. memory cells. D. plasma cells and memory cells.
On axial images, the temporal lobes are seen at the same level as the ____________________.
Fill in the blank(s) with the appropriate word(s).