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1.4 Die reuk- en smaaksintuie

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Natuurwetenskappe

Graad 4

Lewe en lewenswyse

Module 5

Die reuk- en smaaksintuie

Aktiwiteit:

Om te leer oor die reuk- en smaaksintuie

[lu 2.1]

Wanneer jy eet, proe jou tong die smaak en jou neus ruik die geur van die kos. Dit werk so:

Die openinge van jou neus en jou mond kom bymekaar agter in jou keel. Wanneer jy eet, gaan die kosreuke agter in jou mond na jou neus, vanwaar ‘n boodskap deur ‘n senuwee na jou brein gestuur word wat vir jou sê wat jy ruik.

Die tong is grof en bedek met smaakknoppies om verskillende smake vas te stel. Skryf die vier verskillende smake wat ‘n mens op jou tong kan waarneem, neer.

Druk jou neus toe en drink ‘n slukkie koeldrank of tee. Hoekom “proe” dit anders?

Wat gebeur as jy verkoue is en jy eet?

Diere se reuksintuig

  • Die muishond beskerm homself deur ‘n stink vloeistof wat hy na sy vyand toe sprei.
  • Honde kan baie goed ruik. Hulle gebruik hulle reuksin om dwelms, plofstowwe en selfs mense in ‘n groot skare uit te ruik. Hy gebruik ook sy reuksin om sy prooi te jag.
  • Bokke gebruik reuk om buite gevaar te bly. As hulle hul vyand ruik, beweeg hulle gou-gou weg.
  • ‘n Renoster gebruik ook sy reukkliere onder sy voete om boodskappe aan ander renosters te stuur.
  • Voëls hou hulle neste gewoonlik skoon, maar nie die hoep-hoep nie. Deel van sy verdedigingstelsel is dat die stink reuk van sy nes vyande sal weghou.

Assessering

LU 2

KONSTRUKSIE VAN WETENSKAPKENNIS Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

 

Dit is duidelik wanneer die leerder:

2.1   betekenisvolle inligting onthou;

2.2       inligting kategoriseer.

 

Memorandum

  1. Soet
  2. Sout
  3. Bitter
  4. Suur

Druk neus toe: Geure kan nie in die neus inbeweeg nie, dus proe jy net soet, sout, bitter en suur.

Verkoue: Dieselfde as hierbo.

Opdrag 6:

Diere se reuksintuig

  • Die muishond beskerm homself deur ‘n stink vloeistof wat hy na sy vyand toe sprei.
  • Honde kan baie goed ruik. Hulle gebruik hulle reuksin om dwelms, plofstowwe en selfs mense in ‘n groot skare uit te ruik. Hy gebruik ook sy reuksin om sy prooi te jag.
  • Bokke gebruik reuk om buite gevaar te bly. As hulle hul vyand ruik, beweeg hulle gou-gou weg.
  • ‘n Renoster gebruik ook sy reukkliere onder sy voete om boodskappe aan ander renosters te stuur.
  • Voëls hou hulle neste gewoonlik skoon, maar nie die hoep-hoep nie. Deel van sy verdedigingstelsel is dat die stink reuk van sy nes vyande sal weghou.

Questions & Answers

Examine the distinction between theory of comparative cost Advantage and theory of factor proportion
Fatima Reply
What is inflation
Bright Reply
a general and ongoing rise in the level of prices in an economy
AI-Robot
What are the factors that affect demand for a commodity
Florence Reply
price
Kenu
differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
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Lambiv
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Venny Reply
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Rezat Reply
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Eliyee
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Eliyee
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WARKISA
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Lambiv
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Aster Reply
appreciation
Eliyee
explain perfect market
Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
What is ceteris paribus?
Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
yes,thank you
Shukri
Can I ask you other question?
Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
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Lilia Reply
what is the difference between economic growth and development
Fiker Reply
Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
Abdisa Reply
any question about economics?
Awais Reply
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
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Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
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Source:  OpenStax, Natuurwetenskappe graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11097/1.1
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