Timothy was always an active little boy, and was a great player for his Little League team at the age of 12. For the first year or so, Tim had no trouble catching balls and running bases. He was doing such a good job that he was even promoted to the next division. Unfortunately, this is also about the time that his mother started to notice that something wasn’t quite right with Timothy.
At age 14, Tim started to have trouble with his coordination and was slower in practice. His mother wasn’t sure if maybe he was just getting bored with playing. His coach had no choice but to place him on the bench, he just wasn’t keeping up.
He started to grow rapidly, and complained about pain in his joints. Family members just chalked it off to “growing pains.” Teachers observed that Tim seemed withdrawn, and even his grades began to slip.
By the time Tim entered high school, he was very tall for his age. At 6’2”, Tim weighed 155 pounds and wore size 13 shoes. Some of the kids teased him and called him “stringbean.” Even after Tim actively tried to put on weight and muscle mass by going to the gym after school, he just couldn’t seem to gain a pound. Tim’s grades were still not good, and he said he always felt anxious and jittery in school. Tim would often stay home because he felt sick to his stomach, though his mom thought that some of his symptoms might be due to being overwhelmed with his schoolwork. His mother finally decided to take Tim to the doctor to see if there was anything physically wrong with him.
Dr. Chapman made some initial observations and asked Tim about his symptoms. He decided to check Tim’s blood to see if his hormone levels were in the normal range.
Which hormones would be considered in the high range?
What gland produces these hormones?
Which hormones would be considered low?
What gland produces these hormones
The doctor didn’t mention cortisol, but it should also follow a similar feedback loop.
Sketch a feedback loop that includes the hypothalamus, pituitary, adrenal glands, and cortisol.
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