Source of pictures: pixabay.com
A new semesterstarted. Thebrand-new physiology classwas providedfor senior students. In this course, students couldlearn some basic knowledge of anatomy and physiology.Studentscould learn moremysteriesaboutthe human body. In addition to studying in the classroom,they alsohadthe opportunity to visit the community health service center.
Thefirst classwas givenon Wednesday afternoon.Students inclass1, Grade4came to the community health service center near the school.All of themgathered in the conference room.The general practitioner of the communitywas the teacher of the first class.
Wheneveryone sat down, the doctor said,"Welcome toourcommunity. I will introduce some medical knowledge to you in this class.As we all know,we have an organ,thyroidgland.Do you know anything about it?" At this moment, David,who satin the first row,raised his hand. Hestood up and replied: "I have heard of ‘Big Neck Illness' before." Afterhearinghis answer, the doctor nodded and said,"In fact,TheBig NeckIllness, which he just mentioned, isagoiter. This disease is caused byiodine deficiency, which will lead to abnormal thyroid secretion.If a goiter issecreting insufficientα-and β-adrenalineas well asiodineto support normal activity,itcan be treatedthroughiodine supplementation.But ifsomething is wrong withthyroid synthesis, theamountof thyroid stimulating hormone in the blood willremainat a high level for a long time.This will inducecompensatory hyperplasia.It looks like the symptom of 'swollen neck'."
"What I just said is a littlecomplicated.Let’stalk aboutthe thyroidgland," the doctor continued,"The thyroidglandis one ofnumerousglands inourendocrine system. Thebutterfly-shaped gland located infront of our neck.All the glandsinthe endocrine system secrete chemicals called 'hormones', whichwill blendinto the bloodstreamandcirculatewithin our body.The hormones, like a remote controller,regulate functionsof specific organs and organ systems like a remotecontroller.Hormones secreted by the thyroidgland have many roles to play, such asregulating the way cells useenergy,andmetabolic rate. In other words,theyare able toaffect the growth rate of hair and bones, weight,body temperature, together withfunctionsof the heart and digestive system. When the thyroid hormone isinsufficienttomeet the human body's normal needs,theendocrine systemwill get sick.In hospital, youcan find these patients have the samesymptoms, for example,they have dry hairandbrittle nails,theirweight increase significantly, andthey may suffer fromconstipation." After class, Davidsaid spontaneously,"Soamazing, I want to study medicinewhen I grow up!"
Author: Lu An
京公网安备11010502039775号
