because all other numerical values given refer to the serving sive
they all are ratios that are something per serving size
example:
if serving size is 32g then
calories 170 on the label represent the ratio calories 170 per 32g
Answer:
a
Explanation:
they would be the first responder in this situation
Answer:
Accuracy: Girth measurements provide a high-level assessment of an individual. When conducted properly, their accuracy is typically within 5% of the value measured using underwater weighing (the “gold standard” for body composition analysis). ... By measuring several sites, total body fat may be calculated.
Explanation:
Skinfolds are the most accurate way to measure body fat as long as the fold thickness is not converted to a percentage body fat. Generally, excessive body fat impairs athletic performance in activities in which body mass must be moved through space.
Answer:
A. epinephrine
Explanation:
Bronchial constriction usually involves the tightening of the smooth muscles which surrounds the tube-like bronchial airways. This occurs via extra mucus production, spasming of smooth muscles, or swelling/inflammation of layers within bronchi or bronchioles. Bronchial constriction typically results in symptoms of wheezing, coughing and shortness of breath.
This can be treated via the use of the hormone epinephrine, a bronchiodilator. For some cases like asthma, epinephrine in small aerosolized (inhaled) doses can lead to the <em>temporary</em> relief of symptoms. Epinephrine acts by making bronchial tubes wider to allow the passage of air.
In the body, smooth muscle cells in the veins, arteries and heart are under the control of epinephrine receptors called β2 receptors. Epinephrine binding to the receptor triggers a cell signalling cascade that activates β2 receptors to dilate smooth muscle in the lungs.
Here's how-
- Calcium is essential to mediating muscle cell signalling and thus contraction
- in the lungs, epinepherine-β2 receptor binding leads to enzyme activation (adenylyl cyclase)
- conversion of the energy molecule ATP to the secondary messenger molecule cyclic AMP.
- cAMP inhibits the activity of the enzyme <em>myosin light chain kinase </em>(MLCK) in smooth muscle
- ∴ the enzyme remains inactive and the muscles relax
<em>Summary:</em><em> epinephrine → muscle relaxation →</em><em> bronchial dilation (reduced diameter) </em><em>→ decreased respiratory distress → easier breathing.</em>
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