Which of the following best describes positive chemotaxis?
A) the movement of neutrophils through capillary walls
B) the movement of cells toward a high concentration of signaling molecules
C) the dilation of blood vessels, which causes local edema
D) the release of a lytic chemical by perforins
E) the limitation of joint movement
B
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A drop in body temperature triggers an internal reaction that ultimately leads to an increase in body temperature. This is called a __________ feedback loop.
Fill in the blank(s) with the appropriate word(s).
Secondary bronchi supply air to the
A) lungs. B) lobes of the lungs. C) lobules of the lungs. D) alveoli. E) alveolar ducts.
Which atom is a major player in the production of energy from nutrient molecules?
A. Hydrogen B. Nitrogen C. Carbon D. Oxygen
Which of the following cover(s) the brain and spinal cord?
A. Periosteum B. Perichondrium C. Meninges D. Synovial membranes