1969-04-20 — Page 15

1

CI

APR 1969

MALL

育新僑華頁三第張四第 日四初月三年酉己曆夏 WAH KIU YAT PO

報日僑華

一静脉運入心,

日 期星日十二月四年九六九一届公年八十五國民華书

英中會考經濟及公共事務科(十四) ·劉奇敏

文學會考試題預習

8人体之胃壁細胞可由食物之刺激分泌。

可促進湘大量分泌

這類激素

Economic & Public Affairs

生物科

(廿四)

視第二十四 一则出口腔,胃小膳居段消化管所含之酶及消化之食物之作用

(消化腺体

消化 分泌液所含之酶 消化物質 位名稱

·莫愛桐·

人体之小腸壁細胞由胃酸之刺激可分泌。 可促進: 液大量分泌 消化腺之分泌受

追殺激素

Economic & Public Affairs

和

Lecture

By K.X, Lai,

蒸物

消化腺屬有管亦稱 高等動物的消化系統可分。 13人体的消化腺包括

分泌腺

五種

口腔 唾液腺唾液

唾液酶 澱粉 小胃蛋白絲原

芽糖 蛋白胨

盐酸轉尚胃昼 昼白質 白酶

蛋白辣

腺胃液胃凝乳酶(蒸)

直接消化作用,

可使乳中可溶性

̇酪蛋白原凝固

1. 胰蛋白酶片(露蛋白

「胰腺(油) 腸酶轉變為蛋白

縮氨酸

胰腺 十二指腸 胰蛋白酶)

蛋白脉

入口)2脹澱粉酶

3胰脂酶

澱粉 脂肪

1.腸蛋白酶

縮氨酸

[麥芽糖. 脂肪酸 和甘油 氨基酸

2.腸激酶(無直

̇消化作用可使胰

小腸脲小腸液

蛋白酶原轉变 為胰蛋白酶)

13. 蔗糖酶

蘸糖

注麥芽糖酶

【麥芽糖

[葡萄糖

5.乳糖酶

[葡萄

乳糖

二牙齒的構造:

外表的部分

2:函冠:露出口腔的部分。

2.齒頸:為齒冠齒根間窄小的部分

·齒齦常巴着齒頸

齒棍:藏在硬骨齒槽中之部分

內部的物質

a.琺瑯質,在齒冠之外表,此種物 質含有90%以上之鈣和鎂鹽

̇甚為堅硬,可保護牙齒

口齒質其成分像硬骨但無骨細

胞有彈性為齒之主要部份位

齒之中部

龙冠

c. 白垩質,具成分亦像硬骨仕齒根之外表

[葡萄糖」

|和果糖

和小乳糖

一硬骨

一萬頭

・急髄質中部上髄腔内為血管和神経所在

等血管和神經由慈根末端之齒根孔通出。

三蛋白質在人類口腔 食道、胃小腸 大腸各段之消化情況:

1口腔照消化蛋白質之酶,故蛋白在此黑消化作用,此部由

牙齒可把固体之蛋白咀嚼破碎

食道,無消化酶 抵為食物至胃之通道

胃,胃腺分泌胃液,其中含有胃蛋白酶原有凝乳酶 鹽酸

2.具盐酸 使胃蛋白酶原变為胃蛋白酶可使蛋白質水解為

可溶於水之蛋白脉和蛋白骤

6.胃凝乳酶對蛋白無直接消化作用可使乳中可溶性之路 蛋白原凝固使停留胃部時間延長以便胃蛋白酶的消 化作用

* 4小腸、

小腸之十二指腸有胰液输入液内含有胰蛋白酶深遇 腸激酶役变胰蛋白酶可將蛋白質蛋白脉疍如珠等水 解為縮氨酸

♭小腸腸壁之小腸腺可分泌小腸液液内含有腸蛋白酶

和腸激酶.

下腸蛋白酶可把縮氨酸水解為氨基酸

li腸激酶對蛋白無直接消化作用但可便胰觉白酶.

原轉変為銕蛋白脂

大腸,沒有腺体分泌酶,但從上而來之硝化酶可繼續進 行消化作用

三種消化液可消化蛋白質

5消化腺分泌之消化液無酶者此腺為

16主要吸收消化了的糖蛋白、脂肪等養分在消化管之 7.胃部衹能吸收..

大肠主要吸收 可吸收少量之盐類和維他命

、寫出下列各圖標線所指各項名稱

三寫出圖中下列各部之功用:

10 16 18 21 48 55 四比較下列各项:

A.人與兔之步式

B. 小腸與胃之肌肉層

2.化學消化與机械 消化

前期練習解答

A.j肱骨、z肱二頭肌3.桡骨∗脑三頭肌5尺骨

填-

:

ak

小肠上有很多 伸向腸腔,可增加崁食縻投觸面積 逆増加吸水面積 蛋白質消化至... .時消化管不可吸收吸收此芽物質是 由于腸絨毛內之進行

二A腓骨 2肝酱肌

銀骨

a重

力c支

3醣類要消化成單糖例如

等,消化管不

可吸收,吸收此等物質是由小腸絨毛內之

一進行

4.鹽類和溶於水之维他命是由小腸絨毛內之,

s脂肪賀要消化变成,

進行吸收 持消化管才可吸收吸收此

等物質是由小腸絨毛內之......進行

乳糜管收集的養分經

附番5.蹠骨,6.趾骨

三A1肌浆2.肌絲3肌腰4明带5.暗带6.纖維絲 膜、7細胞核肌装 9肌絲10肌矍 11. 細胞核 2肌膜,13插入平面板 14暗带 5明带,6细胞核

7. 絨毛的微血管收集的養分首先由 静脉连至肝,再

平滑!玶滑

骨骼肌᛬心臟肌

4肌肉細胞膜 5.四赢儿 6.屈伸

Answers to the Questions in Exercise No. 22

Seotzon a

(w) By limited liability is meant that the

financial risk each partner of the company is involved is limited to the capital he has invested in the company.

(b) The purpose is to improve community development in each district in Hong Kong as well as to solve the social conditions of the community. The G.D.O. also hopes to eliminate the

information gap between the people and Government. There are districte under C.DO. {c) A Bill of Exchange 18 a commercial. documents

it is a written order signed by one and addressed to another asking the latter to pay a sum of money at a fixed or determinable: future time to a specified person. A cheque 18 a Bill of Exchange.

(d) Hong Kong can buy more goods from that.

country. People from Hong Kong are encouraged. to travel. to that country. On the other hand there will be a drop in our exports to that country..

(a) By demand ie meant the amount of a commodity

a consummer is willing to buy over a goale of. prices at a given time.

(b)(1) The price of a product or service

Bapplied can be made cheaper. [liF Monopoly can eliminate any awkward or

confusing situation in the supply of certain services such as gas or trans port. (iii) The possibility of bankruptcy is ruled

out.

(iv) The supply of one commodity or service can be planned in advance, and no wastage results..

(0) (1) Expansion of his bussiness is difficult

as his capital is limited.

(ld) Hie profite are limited.

(iii):He bannot enjoy the advantage of limited

liability.

(iv) He has limited businese connections.

(a) By introducing Education Television (ETV). (b) Government is going to introduce a better-

organized form of public assistance for the poor:

c) This section studies plans of proposed

factory buildings. It also maintains certain standarde of safety in the installation of equipment in factories. It also determines causes of accidente in factories.

(d) Those who are (a) unmarried and earning less.

than $7,000 per year and (b) those who are married and earning less than $14,000 and (c) those who are married and have children" and earning less than a certain amount acoonding to the number of children he nat if he has one child he should not sarn more than $16,000

if he has 2 children he should not earn more than $18,000,

if he has 3 oblidren be should not earn more than $19,000,

if he has 4 children, ne sÄOULD NOT earn more than $20,000

if he has Schildren he should not eatn more

than $21,000:

if he has 6 children he should not earn more than $22,000

if he has 7 children he should not earn more than $22,000

f he has 8 children he should not earn more. shan $23,000

if he has 9 children ne should not earn more than $23,000.

The Tuls or lawi

4. (a) The Trade. Development Council helps local

manufacturers to find new markets for their exporte; it encourages and helps businessmen. to do more effective publicity work in foreign countries for Hong Kong products, 11 also advises Government how our trade can be. protected and increased.

The Productivity Centre and Counofi helpa locad manufacturers to improve the quality of their goods, and adopt scientific methods of production, with a view to reducing production costs, and it also recruita factory personne. (b) A magistrate tries summary cases ; he also

holds preliminary inquiries into indictable cases. ▲ judge tries more serious types of cases such as indictable 'cases. He hears appeals from the magistrate's courts. He? hears civil cases where the claims exceed $10,000.

(e) Ordinary shares do not have a fixed rate of

dividend; preference shares have a fixed rate of divident.

(a) A Careers Master advises a pupil in what sort of career is best suited to has abilities and talents. He shows the pupil the various types

of careers open to him. Wherever possible he guides the pupil in his selection of his future work.

Commerce is concerned with the distribution

of goods; industry is concerned with the production of goods.

Exeroine No. 23

(1) What are the chier runotions of a newspaper? (2) Explain the damio runotions or a police TOXOS.

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