Tsh
a. is stimulated by thyrotropin-releasing hormone (TRH).
b. is inhibited by T3 and T4.
c. increases the rate of thyroid hormone secretion.
d. promotes hypertrophy and hyperplasia of thyroid cells.
e. all of these answers.
E
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In these views of the trachea, what structure does number 2 indicate?
A. Tracheal cartilage B. Trachealis muscle C. Carina D. Anular ligament E. Pseudostratified ciliated columnar epithelium
Which salivary gland produces a serous secretion containing large amounts of salivary amylase?
A) mandibular B) sublingual C) lingual D) submandibular E) parotid
Saltatory conduction
A) occurs only if the myelin sheath is continuous. B) occurs only if nodes of Ranvier are lacking. C) is faster than conduction on an unmyelinated axon. D) produces a stronger action potential. E) occurs at the synapse.
Which of the following substances must travel across a membrane via facilitated diffusion?
A) carbon dioxide B) water C) oxygen D) fat-soluble vitamins E) glucose