Which of the following is a potent stimulator of aldosterone release?
A) thymosin
B) calcitonin
C) atrial natriuretic peptide (ANP)
D) angiotensin II
D
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Answer the following statements true (T) or false (F)
1. Synovial fluid is a viscous material that is derived by filtration from blood. 2. The articular surfaces of synovial joints play a minimal role in joint stability. 3. The major role of ligaments at synovial joints is to help direct movement and restrict undesirable movement. 4. The only movement allowed between the first two cervical vertebrae is flexion. 5. Movement at the hip joint does not have as wide a range of motion as at the shoulder joint.
Histologically, the epithelium of the alveoli includes which of the following structures?
(1) cornified epithelial cells (2) simple squamous epithelium, type I cells (3) septal, or surfactant, type II cells (4) bony trabeculae (5) roaming macrophages A) All of the above structures are included. B) None of the above structures are included. C) 2, 3, 5 D) 1, 4, 5 E) 1, 3, 5
Melatonin's actions may include
a. regulation of circadian rhythms b. antioxidant activity c. induction of calcium reabsorption d. both a and b e. none of the above
The diffusion of calcium ions into a smooth muscle cell does not depolarize the membrane so no action potential occurs
Indicate whether the statement is true or false.