[DSE生物2018］Bio討論區

收到

emergency contraceptive pills have high dose of hormone which triggers menstruation instantly.

我覺得我而家考5都未必有

上年谷得太盡 好多野都唔記得曬

大家加油
Bio只係前哨戰，之後唔同科目陸續有嚟，要識分配時間

我讀緊Biochem有關既野, 可以出D課外題比你地試下做

個人建議(我自己都係咁溫緊)
睇返pp自己錯左的lq﹐抄marking
得幾日時間，背marking好過溫書
記佢答題目果套鋪排point的style

可能到考個日
你發現題目竟然咁 呢3年準備佢比份咁既卷你

Dse唔會出得好難 你地實識做既

我諗到一題關於metabolism比你地試下:

Pyruvate dehydrogenase deficiency is one of the most common disorders associated with abnormal mitochondrial metabolism. Pyruvate dehydrogenase is a key enzyme involved in the production of acetyl-CoA from pyruvate.

It is an X-linked disease that shows heterogeneous characteristics in both clinical presentation and biochemical abnormality.

The clinical presentation of congenital PDH deficiency is typically characterized by heterogenous neurological features that usually appear within the first year of life.
In addition, patients usually show metabolic acidosis (abnormally low pH value in blood).

=============================
Q1: Explain why it is very rare to find female patients of pyruvate dehydrogenase deficiency.
(2 marks)

Q2: Explain the source of acidosis in patients with pyruvate dehydrogenase deficiency.
(3 marks)

Q3: Explain why high fat diet may help prevent acidosis in these patients?
(2 marks)


BIO人要加油

考oral嗰陣咪係咁囉

想問有無好心巴打有中文AL卷

口渴係因為osmoreceptor in hypothalamus detect a decrease in water potential in blood
跟住send impulse去大腦產生sensation of thirst
所以應該有involve sensory neurone?
有錯請各位高手更正

Decrease in blood water potential 好似係detected by osmoreceptor in hypothalamus

有星既人essay通常拎幾多分
成日覺得自己寫essay好1999
應該dse剩係攞得5分依啲位

兩樣野黎

Thirty feeling is one of the responses to the change in water potential

答案係無

你自己答左自己
大腦係呢個由osmo-receptor作起頭既pathway只係INFORMED but NOT INVOLVED

Change in water potential (stimuli)
-> osmoreceptor
-> posterior pituitary (response)

Osmoreceptor都唔算sensory cell咩

算 仲係one of the neurones

但呢個change in water potential 既reflex pathway原理同問你隻手掂到熱野個個reflex 一樣

條pathway 唔會涉及大腦，大腦只係INFORMED
-> pathway真正涉及係hypothalamus of the brain and posterior pituitary gland
-> not cerebrum of the Brain

Thirsty feeling涉及大腦，但呢個change in water potential下既involuntary response唔涉及大腦

因為你問口渴會唔會關SENSORY NEURONE事

我答你口渴呢個response因為大腦係呢個Osmoregulation 既pathway 受到通知而得出。

口渴本身呢個response唔係involved in the ADH- secretion pathway
-> 一來唔涉及osmoreceptor 條pathway事
-> 二來口渴係關hormone事(renin-angiotensin system which is out-C)

帶番頭盔先

我呢個sem sem2先開波教renal

你睇埋牙肥巴點答

因為renal好撚難 我都驚我學藝未精答錯你
我唔想伏你

https://mmis.hkpl.gov.hk/web/guest/hkcee-and-hkale-papers-collection
可以用呢個網search, 不過有啲麻煩, 如果有非常多時間先用