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Chemistry is the basis of m4 organisms. ✅✨

Start now. Anyone who is coming up .4 or following the content in time. This is a rough summary. This chapter is not difficult to read gradually. Dip. 😄

Suitable for students, students who like to research new knowledge

# Biology # Summary # fyph # Drug sign with lemon8 # Trending

2025/10/12 Edited to

... Read moreเสริมจากสรุปเดิมนะคะ เผื่อคนที่ตามบท “เคมีเป็นพื้นฐานของสิ่งมีชีวิต” ม.4 ไม่ทัน อยากได้ภาพรวมแบบเข้าใจง่าย + จำไปทำข้อสอบได้ 1) สารอนินทรีย์: น้ำ (H2O) สำคัญยังไง? - น้ำเป็นตัวทำละลายที่ดี เลยช่วยลำเลียงสารต่างๆ ในเลือด/น้ำเลี้ยง - ช่วยควบคุมอุณหภูมิร่างกาย (น้ำดูด/คายความร้อนได้ดี) - ช่วยให้เกิดปฏิกิริยาในเซลล์หลายอย่าง (เช่น ไฮโดรไลซิส) ทริคจำ: “ละลาย-ลำเลียง-คุมอุณหภูมิ-ช่วยปฏิกิริยา” 2) แร่ธาตุที่เจอบ่อยในข้อสอบ - Ca (แคลเซียม): กระดูก ฟัน การหดตัวของกล้ามเนื้อ - Fe (เหล็ก): สร้างฮีโมโกลบิน ขนส่งออกซิเจน - I (ไอโอดีน): สร้างฮอร์โมนไทรอยด์ - Na/K: สมดุลน้ำ-เกลือ การทำงานของประสาท ถ้าโจทย์ถาม “ขาดแล้วเป็นอะไร” ให้โยงหน้าที่หลัก เช่น ขาด Fe → ซีด เหนื่อยง่าย 3) สารอินทรีย์ 4 กลุ่มใหญ่ (ออกสอบแทบทุกปี) (1) คาร์โบไฮเดรต - มอโนแซ็กคาไรด์: กลูโคส ฟรุกโตส - ไดแซ็กคาไรด์: ซูโครส แลคโตส มอลโทส - พอลิแซ็กคาไรด์: แป้ง ไกลโคเจน เซลลูโลส ทริคจำหน้าที่: ให้พลังงานเร็ว + สะสมพลังงาน (แป้ง/ไกลโคเจน) + โครงสร้าง (เซลลูโลส) (2) โปรตีน - หน่วยย่อยคือกรดอะมิโน เชื่อมกันเป็นสายด้วยพันธะเพปไทด์ - หน้าที่หลัก: เอนไซม์ ฮอร์โมนบางชนิด โครงสร้าง (คอลลาเจน/เคราติน) ภูมิคุ้มกัน (แอนติบอดี) - กรดอะมิโนจำเป็น = ร่างกายสร้างเองไม่ได้ ต้องได้จากอาหาร เวลาทำข้อสอบ ถ้าเห็นคำว่า “เอนไซม์” หรือ “เร่งปฏิกิริยา” ให้เดาโปรตีนไว้ก่อนเลย (3) ลิพิด (ไขมัน) - กรดไขมันอิ่มตัว: มักแข็งที่อุณหภูมิห้อง (ไขมันสัตว์บางชนิด) - กรดไขมันไม่อิ่มตัว: มักเป็นของเหลว (น้ำมันพืช) - หน้าที่: สะสมพลังงานมาก สร้างเยื่อหุ้มเซลล์ (ฟอสโฟลิพิด) เป็นฉนวนกันความร้อน (4) กรดนิวคลีอิก: DNA vs RNA - DNA: เก็บข้อมูลพันธุกรรม ส่วนใหญ่อยู่ในนิวเคลียส (ในยูคาริโอต) เบส A T C G โครงสร้างสายคู่ - RNA: ช่วยสร้างโปรตีน เบส A U C G มักเป็นสายเดี่ยว ทริคจำ: DNA = “เก็บแผน”, RNA = “เอาแผนไปใช้สร้างโปรตีน” 4) วิตามินที่ควรรู้ + อาการขาดแบบสั้นๆ - วิตามิน A: ช่วยการมองเห็น / ขาดแล้วตาบอดกลางคืน - วิตามิน B1: ระบบประสาท / ขาดแล้วเหน็บชา อ่อนแรง - วิตามิน C: สร้างคอลลาเจน / ขาดแล้วเลือดออกตามไรฟัน แผลหายช้า - วิตามิน D: ดูดซึมแคลเซียม / ขาดแล้วกระดูกนิ่ม (เด็ก) กระดูกพรุน (ผู้ใหญ่) ก่อนสอบแนะนำให้อ่านเป็น “ตารางสรุป” ของแต่ละหมวด: หน่วยย่อย-หน้าที่-ตัวอย่าง-ขาดแล้วเกิดอะไร จะช่วยทำข้อสอบปรนัยได้เร็วมากค่ะ

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