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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On axial images, the temporal lobes are seen at the same level as the ____________________.
Fill in the blank(s) with the appropriate word(s).
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.