Answer:
Jack is having trouble gaining weight and has poor muscle tone.
Explanation:
Answer:
A typical example of the stress response is a grazing zebra. If the zebra sees a lion closing in for the kill, the stress response is activated as a means to escape its predator. The escape requires intense muscular effort, supported by all of the body's systems.
Explanation:
Natural barriers include the skin, mucous membranes, tears, earwax, mucus, and stomach acid.
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