Because there could be unseen blood mixed with the fluids. Hope this helps!!
Answer: Δβ = 28.5278 dB
Explanation:
from the question we are given that;
the sound gathering area Ga = 15.0 cm²
total area Ae = 0.800 cm²
efficiency ε = 38 %
therefore we have that the effective gathering area of the stethoscope is;
As = ε Ga
As = 38 % × 15 = 5.7 cm²
But I ∝ 1/A
where Ie/Is = As/Ae
Ie/Is = 5.7/0.800 = 7.125
given that we are to assume that sound is transmitted into a stethoscope 100 times, this gives
I'e/I's = Ie/Is × 100 = 7.125 × 100 = 712.5
Δβ = βe - βs = (10dB) log (I'e/Io) - (10dB) log (I's/Io)
Δβ = (10dB) log (I'e/I's)
Δβ = (10dB) log (712.5) = 28.5278
Δβ = 28.5278 dB
cheers i hope this helps
Answer:
The correct answer is B. The mucosa is responsible for absorption and secretion.
Explanation:
The mucosa is the deepest layer of the intestinal tract, surrounding the lumen, or space inside the tube. This layer comes into direct contact with food (or bolus) and is responsible for absorption and secretion, which are important processes in digestion.
The mucosa is highly specialized in each organ of the intestinal tract, facing a low pH in the stomach, absorbing a multitude of different substances in the small intestine and also absorbing specific amounts of water in the large intestine.
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