respiration

2006-12-22 6:00 am
乜 respiration 唔係解 呼吸作用 ga 咩??
點解我本書話 :
in our body , food is broken down to release the energy that we need . This process is called respiration . Oxygen is consumed and carbon dioxide is produced in the process .
講到完全唔關呼吸事 ge ???
what is it mean for respiration ??



10點!!

回答 (3)

2006-12-22 7:52 am
✔ 最佳答案
呼吸(breath)和呼吸作用(respiration)雖然不一樣,但關係非常密切。

其實你有沒有想過--人為什麼要呼吸氧氣呢?
你又有沒有想過--人為什麼需要進食呢?
又有沒有想過--為什麼失血過多會死呢?

人的生存、活動需要能量,缺少能量就無法生存。
以上問題的關連就是﹕
- 食物是能量的來源
- 氧氣是令食物氧化釋放出能量的過程
- 血液是運送食物及氧氣的工具

所以呼吸是為了將氧氣送到身體的細胞,然後進行一連串反應釋放食物中能量的過程。
這個釋放能量的過程,解釋了生物呼吸(breath)的原因,所以稱為呼吸作用(respiration)。
較詳細的內容如下﹕

生物學上,呼吸(breath)其實是指空氣在肺部進行的換氣(gas exchange)的過程。
空氣被吸入肺部後,空氣中的氧氣會穿過肺泡膜進入血液中。
空氣會在血液裡流到身體各部分,然後被細胞吸收。

食物被人攝食後,會在腸胃進行消化作用(digestion),分成細小的單位。
人類最常直接使用的營養單位是分解碳水化合物後生成的葡萄糖。
各種營養單位穿過腸胃壁後最終送進血管或淋巴。
組血液運送到身體各部分的細胞。

細胞就是進行呼吸作用(respriation)的地方。
葡萄糖首先進入醣解作用(glycolysis),然後進入檸檬酸循環(TCA Cycle 或 Crab Cycle),
再經過電子傳遞鏈(Electron Transport Chain),最終產生大量能量。
結果食物被氧氣分解成水和二氧化碳--這就是人為什麼會呼出二氧化碳的原因。

人失血會死,正因為無法運送氧氣和食物到細胞,導致細胞大量死亡。
燒碳時吸入一氧化碳會死,是因為一氧化碳令紅血球無法輸送氧氣,細胞無法獲得氧氣。


總結來說,呼吸(breath)是為了將氧氣送到細胞進行呼吸作用(respiration)分解食物產生能量。
希望我這樣解釋能令你清楚而全面地了解他們的關係。 ^^

2006-12-21 23:57:51 補充:
看見樓上的發言後發覺串錯字﹕檸檬酸循環是 TCA Cycle 或 Kreb Cycle。基於 Kreb Cycle 的譯音,又稱克氏循環。不是 Crab Cycle。抱歉犯了這種錯誤 ~有關 Glycolysis 和 TCA Cycle,可參考我回答的另一題 Yahoo 知識!http://hk.knowledge.yahoo.com/question/?qid=7006121904245裡面引用了網址,解釋這兩個幾乎是人體最重要的化學過程。它的重要性不止是呼吸作用那麼簡單。
參考: 自己
2006-12-22 6:11 am
In general, we interpret the word "respiration" as we breathe in the air and breathe out the air. However, in biochemical point of view, respiration has its additional meaning. To be precise, usually we will describe the breathing which is your meaning of "respiration" as ventilation. In biochemcial point of view, respiration is a series of chemical process in which the sugar is broken down into carbon dioxide and water in the presence of oxygen. And this process can give out energy. The overall reaction is:
C6H12O6 + 6O2 -------> 6CO2 + 6H2O + energy

There is a reverse process in the nature to convert the carbon dioxide and water back to sugar by using the solar energy. This process is called photosynthesis.

I hope the information can help.
2006-12-22 6:05 am
respiration 唔同breath
breath係呼吸, 即用lung果D
respiration係cellular level既, 叫呼吸作用, is a process to release energy

Breathing is happened in lung,it specific refers to the gaseous exchange.
ie.breathing in and breathing out.
That means it prefers to describe the breathing mechanism.
It will not produce energy.

However,respiration is happened in the cell which include cytoplasm and mitochondria.Respiration also called cellular respiration.
it involved 3 stages:glycolysis,kreb's cycle and electron transport system.
cellular respiration can divided into 2 types,anaerobic respiration and aerobic respiration.the former can only release 2 ATP and the latter can release 38 ATP.

The main difference between breathing and respiration is the place and whether it will release energy.

你可以search "respiration vs breathing" 黎得到更多info的~
參考: my brain again~


收錄日期: 2021-04-23 18:57:49
原文連結 [永久失效]:
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