什么是肠道菌群？
What is the gut microbiome?
肠道菌群是居住在消化道内的数以万亿计的微生物群落。它们帮助消化纤维、合成某些维生素并训练免疫系统。菌群失衡与肥胖、炎症甚至情绪问题相关。
The gut microbiome is the trillions of microbes living in the digestive tract. They help digest fiber, synthesize some vitamins, and train the immune system. Imbalance is linked to obesity, inflammation, and even mood issues.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#肠道菌群 #微生物 #免疫
肝脏有哪些重要功能？
What are the important functions of the liver?
肝脏能合成蛋白质、储存糖原并分解毒素和药物。它分泌胆汁帮助脂肪消化，还参与调节血糖和胆固醇。它是人体代谢的中枢器官。
The liver makes proteins, stores glycogen, and breaks down toxins and drugs. It secretes bile to aid fat digestion and helps regulate blood sugar and cholesterol. It is the metabolic hub of the body.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#肝脏 #代谢 #胆汁
胰腺在消化中的作用？
What is the role of the pancreas in digestion?
胰腺分泌含多种酶的胰液，能分解蛋白质、脂肪和碳水化合物。它还分泌胰岛素调节血糖。胰液经导管进入小肠，是化学消化的主力之一。
The pancreas secretes pancreatic juice rich in enzymes that break down proteins, fats, and carbohydrates. It also releases insulin to regulate blood sugar. The juice enters the small intestine through a duct and is a major force in chemical digestion.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#胰腺 #胰液 #胰岛素
膳食纤维有什么好处？
What are the benefits of dietary fiber?
膳食纤维不被人体消化，却能增加粪便体积、促进肠道蠕动，预防便秘。它还能帮助调节血糖和血脂，并为肠道菌群提供养分。全谷物、蔬菜和水果是良好来源。
Dietary fiber is not digested by us, yet it adds bulk and speeds intestinal movement, preventing constipation. It also helps regulate blood sugar and lipids and feeds gut bacteria. Whole grains, vegetables, and fruits are good sources.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#膳食纤维 #肠道 #便秘
胆囊储存什么？
What does the gallbladder store?
胆囊储存并浓缩肝脏分泌的胆汁。进食含脂食物后，胆囊收缩把胆汁排入小肠帮助乳化脂肪。若胆汁成分失衡，可能形成胆结石。
The gallbladder stores and concentrates bile made by the liver. After a fatty meal, it contracts and releases bile into the small intestine to emulsify fats. Imbalanced bile components can form gallstones.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#胆囊 #胆汁 #脂肪消化
为什么会有饥饿感？
Why do we feel hungry?
当胃排空、血糖下降时，身体会释放饥饿激素并减少饱腹信号。大脑下丘脑整合这些信号，产生想吃东西的欲望。进食后血糖回升，饱腹感取而代之。
When the stomach is empty and blood sugar drops, the body releases hunger hormones and reduces satiety signals. The hypothalamus integrates these cues and creates the desire to eat. After eating, blood sugar rises and fullness takes over.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#饥饿 #血糖 #下丘脑
胃为什么不会消化自己？
Why doesn't the stomach digest itself?
胃黏膜能分泌黏液形成保护屏障，隔绝强酸和消化酶对胃壁的作用。同时胃黏膜细胞更新很快，受损处能迅速修补。若保护机制失衡，就可能形成胃溃疡。
The stomach lining secretes mucus that forms a protective barrier, shielding the wall from strong acid and enzymes. The lining cells also renew rapidly, repairing damage quickly. If this protection fails, a gastric ulcer can form.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#胃 #黏液屏障 #胃溃疡
小肠为什么是消化和吸收的主要场所？
Why is the small intestine the main site of digestion and absorption?
小肠很长且内壁有绒毛和微绒毛，极大增加了吸收表面积。它接收胃液、胆汁和胰液，把营养彻底分解。绝大多数糖、氨基酸和脂肪在此被吸收入血。
The small intestine is long, and its wall is lined with villi and microvilli that vastly increase absorptive surface. It receives gastric juice, bile, and pancreatic juice to fully break down nutrients. Most sugars, amino acids, and fats are absorbed here into the blood.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#小肠 #绒毛 #吸收
为什么吃太快容易胀气？
Why does eating too fast cause bloating?
进食过快会吞入过多空气，同时食物咀嚼不充分增加胃肠负担。肠道细菌发酵未充分消化的食物会产生气体。细嚼慢咽有助于减少胀气。
Eating fast makes you swallow excess air and leaves food poorly chewed, taxing the gut. Bacteria ferment the under-processed food and produce gas. Chewing slowly helps reduce bloating.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#胀气 #进食习惯 #消化
大肠主要做什么？
What does the large intestine mainly do?
大肠主要负责吸收水分和电解质，使食物残渣变干成形。它还容纳肠道菌群，帮助发酵部分纤维并产生维生素。剩余残渣最终形成粪便排出。
The large intestine mainly absorbs water and electrolytes, drying and shaping the leftover material. It hosts gut bacteria that ferment some fiber and produce vitamins. The remainder becomes stool and is expelled.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#大肠 #吸水 #肠道菌群
胃酸是什么，有什么用？
What is stomach acid and what does it do?
胃酸主要是盐酸，使胃内呈强酸性。它能激活消化酶、杀灭随食物进入的细菌，并帮助分解蛋白质。酸性环境是胃部消化的关键。
Stomach acid is mainly hydrochloric acid, making the stomach strongly acidic. It activates digestive enzymes, kills bacteria entering with food, and helps break down proteins. This acidic environment is key to gastric digestion.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#胃酸 #盐酸 #消化
唾液有什么作用？
What is the role of saliva?
唾液能润湿食物，便于咀嚼和吞咽。它含有淀粉酶，可开始分解淀粉为糖。此外唾液还有清洁口腔和初步抗菌的作用。
Saliva moistens food to ease chewing and swallowing. It contains amylase that starts breaking starch into sugars. Saliva also cleans the mouth and offers early antibacterial defense.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Urry 等,《Campbell Biology》第11版,Pearson,2017
L. A. Urry et al., Campbell Biology, 11th ed., Pearson, 2017
独立核验依据 · Independent verification: 核验依据 2 ISBN 978-0-13-409341-3 (11th ed., Pearson)
#唾液 #淀粉酶 #消化