2017 DSE Bio 討論區(2)

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2017-04-22 16:31:02
個reflex arc入面一牽涉到interneuron咪就係講會上brain咩?

唔係
Withdrawl reflex涉及interneurone - motor neurone

咁interneuron係有咩用?

我都唔識太多...
無點深究落去

因為我印象中好似有reflex arc係無interneuron,直接係sensory 連 motor
2017-04-22 16:34:32
個reflex arc入面一牽涉到interneuron咪就係講會上brain咩?

唔係
Withdrawl reflex涉及interneurone - motor neurone

咁interneuron係有咩用?

我都唔識太多...
無點深究落去

因為我印象中好似有reflex arc係無interneuron,直接係sensory 連 motor


Knee jerk reflex.
2017-04-22 16:46:43
what is the major difference between reason and significance ?
2017-04-22 16:56:08
what is the major difference between reason and significance ?

Reason , why it will happen ?

Significance: on the condition that we know it happens, what is the benefit of the occurrence?
2017-04-22 16:56:54
what is the major difference between reason and significance ?

Reason , why it will happen ?

Significance: on the condition that we know it happens, what is the benefit of the occurrence?

你見到,其實一樣都係因果邏輯題黎
2017-04-22 17:07:53
或者咁講,可能會易明d

Reason is reason
Significance is also a reason

General term
specific term under specific circumstances

其實所有野,包括結果都可以同時係另一條問題既原因
2017-04-22 17:24:29
或者咁講,可能會易明d

Reason is reason
Significance is also a reason

General term
specific term under specific circumstances

其實所有野,包括結果都可以同時係另一條問題既原因

成日唔中point
2017-04-22 17:25:09
或者咁講,可能會易明d

Reason is reason
Significance is also a reason

General term
specific term under specific circumstances

其實所有野,包括結果都可以同時係另一條問題既原因

成日唔中point

諗住見到reason就乜柒都包
2017-04-22 17:25:25
而家呢個時候應該操卷定睇書


呢個時候suppose你要操晒卷、溫啲細位
假如你有concept唔明就睇書啦,然後再做pp 啦


小弟一直對細胞分裂同遺傳物質唔熟
請問呢條2015 Q2c,子細胞的DNA含量
點解答案係「減數分裂時,同源染色體在赤道配對並各自分離至子細胞,有絲分裂則不會」既?
咩減數分裂唔係第一次分裂個時,子細胞係2N,第二次先係1N咩?
我答左「有絲分裂前遺傳物質複製,減數分裂前遺傳物質不會複製」
中文JJ希望樓主唔好介意同歧視


有絲分裂同減數分裂前都會進行遺傳物質複製,呢個基本事實唔可以錯先。
至於2N 1N嗰啲,你首先要知道什麼是N。N=1 set 染色體。
進行第一次減數分裂前,細胞有2set染色體。當同源染色體分離,令到之後嘅子細胞只有1 set 染色體。

n 意思係 haploid
2n 係somatic chromosome
唔一定係diploid


但就咁睇,第一次減數分裂前,唔係應該有4set染色體,係4n咩?
我理解為第一次減數分裂後子細胞係2N,再之後第二次減數分裂,先形成4個1N子細胞,咁有冇錯?

冇4n呢樣野存在
2017-04-22 17:27:06
或者咁講,可能會易明d

Reason is reason
Significance is also a reason

General term
specific term under specific circumstances

其實所有野,包括結果都可以同時係另一條問題既原因

成日唔中point

諗住見到reason就乜柒都包

又唔好咁講

考試導向黎講,你無頭緒既前題下,大包圍又未嘗唔可取

你或者星期一諗清楚吧。我都幫唔到你太多
2017-04-22 17:31:43
入到黎全部英文教既 溝通唔到
2017-04-22 17:39:55


呢個時候suppose你要操晒卷、溫啲細位
假如你有concept唔明就睇書啦,然後再做pp 啦


小弟一直對細胞分裂同遺傳物質唔熟
請問呢條2015 Q2c,子細胞的DNA含量
點解答案係「減數分裂時,同源染色體在赤道配對並各自分離至子細胞,有絲分裂則不會」既?
咩減數分裂唔係第一次分裂個時,子細胞係2N,第二次先係1N咩?
我答左「有絲分裂前遺傳物質複製,減數分裂前遺傳物質不會複製」
中文JJ希望樓主唔好介意同歧視


有絲分裂同減數分裂前都會進行遺傳物質複製,呢個基本事實唔可以錯先。
至於2N 1N嗰啲,你首先要知道什麼是N。N=1 set 染色體。
進行第一次減數分裂前,細胞有2set染色體。當同源染色體分離,令到之後嘅子細胞只有1 set 染色體。

n 意思係 haploid
2n 係somatic chromosome
唔一定係diploid


但就咁睇,第一次減數分裂前,唔係應該有4set染色體,係4n咩?
我理解為第一次減數分裂後子細胞係2N,再之後第二次減數分裂,先形成4個1N子細胞,咁有冇錯?

冇4n呢樣野存在

2n係指一個生物普通細胞嘅chromosome 狀態
可以係diploid, tetraploid, hexaploid
而n係指佢sex cell嘅chromosome 狀態
2n: Diploid = n: monoploid, 2n: tetraploid = n: diploid
If 2n = Triploid, pentaploid (單數ploidy), 通常就會係sterile
2017-04-22 18:23:48
Aim3/4應該做成點
同埋如果唔識既話早走溫elective會唔會唔明智

2017-04-22 18:26:54
個reflex arc入面一牽涉到interneuron咪就係講會上brain咩?

唔係
Withdrawl reflex涉及interneurone - motor neurone

咁interneuron係有咩用?

我都唔識太多...
無點深究落去

因為我印象中好似有reflex arc係無interneuron,直接係sensory 連 motor


Knee jerk reflex.

冇interneuron 或者只係得一個synapse 嘅reflex叫monosynaptic reflex
另外如果個reflex 有一或多個interneuron或者兩個或以上synapses 叫polysynaptic reflex
Interneuron 可以擔當synaptic delay 嘅角色,延長reflex,而且可以喺spinal cord到控制reflex 嘅inhibition 同excitation
好似係
2017-04-22 18:42:05
講番近排捐器官單野 x e4

其實假裝係切部分pancreas (assume捐到):

Q1. 點解actively dividing cell in cut pancreas 會知道要再divide?

Q2. 點解佢地知道要divide back that certain size similar to original size?

Q3. Well developed cells in cut pancreas like beta cells 會否一樣識divide as multipotent stem cell in pancreas?

終極疑問,求解答
2017-04-22 18:43:56
個reflex arc入面一牽涉到interneuron咪就係講會上brain咩?

唔係
Withdrawl reflex涉及interneurone - motor neurone

咁interneuron係有咩用?

我都唔識太多...
無點深究落去

因為我印象中好似有reflex arc係無interneuron,直接係sensory 連 motor


Knee jerk reflex.

冇interneuron 或者只係得一個synapse 嘅reflex叫monosynaptic reflex
另外如果個reflex 有一或多個interneuron或者兩個或以上synapses 叫polysynaptic reflex
Interneuron 可以擔當synaptic delay 嘅角色,延長reflex,而且可以喺spinal cord到控制reflex 嘅inhibition 同excitation
好似係

Can you pm my email?
Loads of q about e4 to ask @&

klausteward@gmail.com
2017-04-22 18:51:37
Antibiotics 同sulpha drugs都只針對bacteria?
2017-04-22 18:53:00
Antibiotics 同sulpha drugs都只針對bacteria?

Antibiotics in terms of dse : yes

Sulpha drugs: not sure
2017-04-22 19:14:01
Aim3/4應該做成點
同埋如果唔識既話早走溫elective會唔會唔明智


你決定啦。
你溫electives溫到幾多你自己衡量,不過早走之後先發現有mistake你就唔好喊。
2017-04-22 19:16:20
個reflex arc入面一牽涉到interneuron咪就係講會上brain咩?

唔係
Withdrawl reflex涉及interneurone - motor neurone

咁interneuron係有咩用?

我都唔識太多...
無點深究落去

因為我印象中好似有reflex arc係無interneuron,直接係sensory 連 motor


Knee jerk reflex.

冇interneuron 或者只係得一個synapse 嘅reflex叫monosynaptic reflex
另外如果個reflex 有一或多個interneuron或者兩個或以上synapses 叫polysynaptic reflex
Interneuron 可以擔當synaptic delay 嘅角色,延長reflex,而且可以喺spinal cord到控制reflex 嘅inhibition 同excitation
好似係


你講嗰啲term全部唔考
2017-04-22 19:18:27
入到黎全部英文教既 溝通唔到

你有問題用中文講,我就會用中文答你。
2017-04-22 19:21:14
Antibiotics 同sulpha drugs都只針對bacteria?

Antibiotics in terms of dse : yes

Sulpha drugs: not sure

sulfonamides 有 antibacterial, antifungal 同 antimalarial 功用
其中一隻sulfanilamide (antibacterial)可以inhibit synthesis of essential metabolites (Folic acid)
不過好似out syl
2017-04-22 19:21:56
Antibiotics 同sulpha drugs都只針對bacteria?

Antibiotics in terms of dse : yes

Sulpha drugs: not sure

sulfonamides 有 antibacterial, antifungal 同 antimalarial 功用
其中一隻sulfanilamide (antibacterial)可以inhibit synthesis of essential metabolites (Folic acid)
不過好似out syl

Pm me ahhh
Thanks ><
2017-04-22 19:23:14
Antibiotics 同sulpha drugs都只針對bacteria?

Antibiotics in terms of dse : yes

Sulpha drugs: not sure

sulfonamides 有 antibacterial, antifungal 同 antimalarial 功用
其中一隻sulfanilamide (antibacterial)可以inhibit synthesis of essential metabolites (Folic acid)
不過好似out syl

我都係今日check syllabus 先知immunity 個課有sulpha drug...
2017-04-22 19:26:09
what is the major difference between reason and significance ?


好大分別。
Reason係純粹一件事情發生嘅原因。
Significance係一件事情/事物嘅重要性或者好處。
例如點解出汗同出汗嘅重要性個答法完全唔同。
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