Beta, cell membrane ke beech cheezein kaise aati-jati hai... simple diffusion to aisa hai jaise hawa mein phail jaana, koi rukawat nahi. Facilitated diffusion mein koi darwaaza khulta hai, par andar jaane ka kharcha nahi. Aur active transport... wah! seedhi baat hai, paisa lagta hai, jaise pump se pani kheenchna. Main diabetes ke kaaran roz dekhta hoon, mere potassium ka level sambhalne ke liye body ko extra mehnat karni padti hai, energy kharch karke us mineral ko andar le aati hai. Warna bina kharch ke to kuch bhi andar nahi aata, na hi glucose mere cells mein.
#cities#rent
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