Answer:
The development and alteration of the gut microbiome are affected by a variety of factors including birthing and infant feeding method, exposure to stress, environment, diet, medications, stage of lifecycle, and comorbid diseases (Fig. 4.2).
Explanation:
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Answer:
Because a stationary front marks the boundary between two air masses, there are often differences in air temperature and wind on opposite sides of it. The weather is often cloudy along a stationary front, and rain or snow often falls, especially if the front is in an area of low atmospheric pressure.
Answer:
IgM
Explanation:
The first molecular mechanism of adptative immunity to appear is IgM. These molecular pentameric (constituted of 5 smaller units), are produced in the macrophages of the organism and are released when some time has elapsed since the beginning of the infection (latency period). By having 5 possible epitopes, it increases the chances of triggering a cell-mediated immune response and stimulating the production of IgG.
Answer:
The periosteum is one source of precursor cells which develop into chondroblasts and osteoblasts that are essential to the healing of bone. Other sources of precursor cells are the bone marrow (when present), endosteum, small blood vessels, and fibroblasts.
