What do all hormones have in common?
A. They are made from amino acids.
B. They are bound to transport molecules in the blood.
C. They bind to and interact with a receptor on or in the target cell.
D. They use the second messenger mechanism to control the target cell.
E. They are all lipid-soluble.
C
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Which structure is supplied by postganglionic fibers originating in the ciliary ganglion?
A. Liver B. Spleen C. Smooth muscle of the iris that constricts the pupil D. Parotid gland E. Submandibular salivary gland
Stimuli for the activation of the RAAS pathway include
A) high blood pressure in the renal artery only. B) a decrease in fluid flow through the distal tubule only. C) low blood pressure in arterioles in the nephron and a decrease in fluid flow through the distal tubule. D) low blood pressure in arterioles in the nephron, a decrease in fluid flow through the distal tubule, and high blood pressure in the renal artery. E) low blood pressure in arterioles in the nephron only.
All blood vessels are lined with ________.
A. elastin B. the tunica externa C. smooth muscle D. endothelial cells
Which of the following would not be a common occurrence at joints due to aging?
A: ligaments become stretched and lengthen B: amount of synovial fluid produced decreases C: osteoarthritis due to wear and tear on joints can occur D: articular cartilages becomes thinner E: exervicse can help an older person maintain their range of motion