Gasping for Air John, the assistant expedition leader and a seasoned alpinist, h

Question

Gasping for Air

John, the assistant expedition leader and a seasoned alpinist, helped Tom guide Mark down the steep trail. Mark's breathing, increasingly labored with every passing moment, was loud enough to worry Emily and Pete, the expedition's final climber.

"Geez, do we sound like that?" gasped Pete. "I mean, I'm out of breath, too, but he sounds horrible!" "No, we're not that bad. Remember, that's why we spent the prep month at 15,000 feet. Mark was with us, so he experienced the same physiological changes we did. This," Emily nodded at Mark, "is some sort of problem."

Part II Questions

Fill in the following table about the hormone that was released when the expedition spent their prep month at 15,000 feet.

Explanation / Answer

HORMONE SOURCE OF HORMONE STIMULUS OF RESPONSE TARGET TISSUE PHYSIOLOGICAL RESPONSE GnRH hypothalamus increased piturary gland decreased FSH anterior pitutary increased sertoli cells and granulosa cells decreased Prolactin posterior pitutary increased mamary gland decreased Norepinephrine adrenal medulla decreased blood vessels increased cortisol adrenal cortex decreased liver fat and muscles increased

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