The first rapid transit and the first fast mail line across the continent from the Missouri River to the Pacific Coast.
Answer:
A
Explanation:
All involve the active transport of gases across membranes.
The four sensations detected by the tactile receptors in the skin are touch, pressure and vibration and tickle.
<h3>What are the 4 sensations that the receptors found in the skin have?</h3>
They are nerve endings formed by a branched axon. They are distributed in almost all parts of the body and capture mechanical (pressure), thermal (cold and heat) and especially painful sensations.
This is because Tactile sensations are the ones that detect touch, pressure, and vibration. About six different types of tactile receptors are known.
See more about tactile receptors at brainly.com/question/11104730
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