Lymphatic tissue forms
a. all types of white blood cells
b. only lymphocytes
c. both lymphocytes and monocytes
d. lymphatic tissue does not form blood cells
c. both lymphocytes and monocytes
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When stress is applied to a bone,
A) the minerals in the bone produce a weak electrical field that attracts osteoblasts. B) osteoclast activity increases and osteoblast activity decreases. C) the bone becomes thin and brittle and ultimately fractures. D) the bone compensates by becoming thinner in the region of stress. E) blood supply through the nutrient artery diminishes and thus remodeling proceeds at a much slower rate.
Ridges that anchor muscles that stabilize the head are the
A) anterior and posterior nuchal lines. B) anterior and superior nuchal lines. C) inferior and superior nuchal lines. D) medial and lateral nuchal lines. E) cranial and caudal nuchal lines.
Polar R groups of closely positioned amino acids often enter into _________ with each other, which helps give a protein its three-dimensional shape.
A. hydrophobic interactions?B. ionic bonds?C. hydrogen bonds?D. van der Waal repulsions?E. sulfur-carbon bonds
Bones of a synovial joint are held together by
A) articular cartilage. B) a meniscus. C) a joint capsule. D) a synovial membrane.