Question

name: cleymar murrino period: 2 and 3
what’s wrong with timothy? - a case study on the endocrine system
part i— as a teenager…
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 teachers observed that tim seemed withdrawn, and even his grades began to slip. in junior high, many of the other boys were showing an interest in girls, but not tim, he just became more introverted.
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. he first focused on the thyroid, since that is the gland often associated with metabolism.

1. list tim’s symptoms and identify the organ system (or specific organ) associated with those symptoms. (you may need to reference other materials to identify associated organs and systems.)
2. where is the thyroid? why did the doctor want to focus on the thyroid?
3. the doctor also decides to check on timothy’s cortisol levels. what gland(s) produce cortisol?

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Explanation:

Question 1: List Tim’s symptoms and identify the organ system (or specific organ) associated with those symptoms.

• Symptoms: Trouble with coordination, slower in practice, rapid growth, joint pain, withdrawn behavior, slipping grades, inability to gain weight, feeling anxious/jittery, feeling sick to stomach.
• Organ System/Organ Association: Most symptoms relate to the endocrine system (specifically the thyroid initially, and potentially other endocrine glands like adrenal glands for anxiety/jitteriness). The endocrine system regulates hormones, and imbalances can cause growth, metabolic, and behavioral changes. For example, thyroid issues (endocrine gland in neck) affect metabolism, growth, and coordination; adrenal glands (endocrine) affect stress/anxiety (cortisol).

• Thyroid Location: The thyroid gland is located in the neck, below the larynx (voice box), around the trachea (windpipe).
• Doctor’s Focus Reason: The thyroid gland is part of the endocrine system and regulates metabolism (how the body uses energy), growth, and development. Tim’s symptoms (slow coordination, weight issues, growth, mood/cognition changes) align with metabolic/hormonal imbalances, so the doctor checked the thyroid first (as it’s key for metabolism).

Cortisol is a stress hormone produced by the adrenal glands (specifically the adrenal cortex, part of the adrenal glands located on top of the kidneys). The adrenal glands are part of the endocrine system and secrete cortisol to regulate stress, metabolism, and other functions.

Answer:

• Symptoms:
• Coordination trouble, slower in practice (endocrine system - thyroid, as metabolism affects energy/movement).
• Rapid growth, joint pain (endocrine system - growth hormone - pituitary gland; or thyroid, as thyroid affects growth).
• Withdrawn, slipping grades (endocrine - hormonal imbalances affect mood/cognition).
• Can’t gain weight (endocrine - thyroid/metabolism).
• Anxious/jittery (endocrine - adrenal glands/cortisol).
• Sick to stomach (endocrine - stress hormones affecting digestion).
• Organ System/Organ: Endocrine system (thyroid, pituitary, adrenal glands).

Question 2: Where is the thyroid? Why did the doctor want to focus on the thyroid?