The answer is: [B]: "irises" .
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The signs of protein deficiency include:
•hunger- protein is needed to promote signals of satiety(fullness) to the brain and stabilize blood sugar
•depression
•fatigue- lack in protein can lead to both muscle fatigue and brain fatigue
•hair loss- both collagen and keratin are the main components of hair and both of these products are made of amino acids from protein
•slow recovery from injuries- protein is needed to heal and rebuild cells
The correct answer for the given question above would be the second option. If your training program is focused on improving how well your heart and lungs work together to supply oxygen to your body during exercise, then the related factor that you are targeting is cardiovascular efficiency. Cardiovascular efficiency measures how well your circulatory system is able to deliver oxygen to the rest of the body.
It reflects poorly on your job and can cause you to get fired.
