BiologyPushan · Class 9-10
Zyada namak, zyada pressure — kaise?
Namak toh pet mein jaata hai, phir doctor usse blood pressure se kyun jodte hain?
Socho pehle… phir dekho jawab
Namak ka sodium khoon mein pahunchta hai. Body sodium ka concentration balance rakhne ke liye zyada paani rok leti hai. Zyada paani matlab zyada blood volume, aur zyada volume matlab nasson ki deewaron par zyada dabav.
Dil ek pump hai jo khoon ko arteries mein dhakelta hai. Khoon jo force arteries ki deewar par lagata hai, woh hai blood pressure. Isse sphygmomanometer se naapte hain — normal adult mein lagbhag 120/80 mm Hg, jahan 120 systolic (dil sikudne par) aur 80 diastolic (dil relax hone par) hai.
Ab socho ek paani ka pipe jismein tum aur paani bhar do — pressure badhega. Zyada namak khaane par body paani rokti hai, blood volume badhta hai, aur dil ko har dhadkan par zyada zor lagana padta hai. Lambe samay tak aisa ho toh hypertension (high BP) ho sakta hai, jo dil, dimaag aur kidney ko nuksaan pahunchata hai.
Kidneys extra sodium aur paani ko filter karke bahar nikaalti hain, par unki bhi limit hai. WHO ki salah hai ki adult roz 5 gram se kam namak khaayein — yaani lagbhag ek chammach. Chips, namkeen, achaar aur instant noodles mein chhupa namak sabse zyada hota hai.
Ghar pe try karo
Aaj ghar ke 3 packet (chips, biscuit, noodles) ke label padho. 'Sodium' kitne mg likha hai, note karo. Kaunsa packet sabse zyada namkeen nikla — jo sabse namkeen lagta tha, wahi?
Wow!
High BP ko 'silent' kaha jaata hai — aksar koi dard nahin hota, isliye naapna hi ek tareeka hai jaanne ka.
3 sawaal
- BP reading 120/80 mein 120 kya batata hai?
Jawab dekho
Systolic pressure. Upar wala number systolic hai — jab dil sikud kar khoon dhakelta hai.
- Zyada namak BP kyun badhata hai?
Jawab dekho
Body paani rokti hai, blood volume badhta hai. Sodium ke saath paani rukta hai, volume badhta hai, aur deewaron par pressure badhta hai.
- Blood pressure kis instrument se naapa jaata hai?
Jawab dekho
Sphygmomanometer. BP naapne ka instrument sphygmomanometer hai.
NCERT se jodo: NCERT Class 10 Science — life processes (transportation, blood pressure aur excretion)