What is NOT an effect of parathyroid hormone (PTH)?
A.)increased release of calcium ions from bone
B.)increased osteoblast activity
C.)increased reabsorption of calcium ions from fluid in the kidneys
D.)increased absorption of calcium ions by the small intestine
B.)increased osteoblast activity
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The membrane that surrounds and protects the heart is called the
a) pericardium. b) pleura. c) myocardium. d) mediastinum. e) endocardium.
Using Figure 20.2, match the following:
1) Area where B cells become immunocompetent. 2) Area where T cells become immunocompetent. 3) Area where activated immunocompetent B and T cells recirculate. 4) Area seeded by immunocompetent B and T cells. 5) Area where antigen challenge and clonal selection are most likely to occur.
C) intrapleural pressure decreases.
A) inspiratory reserve volume. B) tidal volume. C) vital capacity. D) minimal volume. E) expiratory reserve volume.
The interconnecting struts and plates found in spongy bone are called
A) osteons. B) trabeculae. C) concentric lamellae. D) interstitial lamellae. E) lacunae.