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Natuurwetenskappe

Graad 9

Lewensprosesse: ‘n gesonde lewe

Module 10

Senuwees en sensitiwiteit

  • Sensitiwiteit is die vermoë wat jy het om op jou veranderende omgewing (intern en ekstern) te reageer.
TERM VERDUIDELIKING
Stimulus 'n Omgewingsverandering
Reseptore Spesiale selle of organe wat stimulus opvang
Impuls Boodskap soos wat dit vanaf reseptore na brein of rugmurg gaan
SSS Sentrale senuweesisteem: brein + rugmurg
Neuron Senuweesel
Effektore Spiere of kliere wat op boodskappe reageer

Aktiwiteit: TABELLE VOLTOOI - senuwees

1. Skryf die stimulusreaksiepad neer vir wanneer 'n by jou op die hand steek

2. Vul die byskrifte in op die skets van die brein en neuron.

Neuron

Brein

3. Voltooi die funksietabel:

STRUKTUUR FUNKSIE
Brein -----------------------------------------------------------------------------------
Rugmurg ----------------------------------------------------------------------------------
Motoriese neuron -----------------------------------------------------------------------------------
Sensoriese neuron -----------------------------------------------------------------------------------

5. VIND UIT:

  • Hoekom

a) jy jou oë knip

b) jou neus loop as jy gehuil het

c) jou pupille groot word in 'n donker vertrek

d) kos na niks proe as jou neus toe is nie

Die effekte van dwelmmiddels en alkohol op die brein

Wanneer jou liggaam pyn verduur, gebruik jy pynstillers om die pyn te verwyder. Jy kan dus baie maklik jou senuweesisteem se gevoelsvermoë beheer. Medikasie kan dus nuttig wees, maar soms word dit misbruik.

So word dwelmmiddels gebruik om opwinding te verskaf en dit is gevaarlik, aangesien dit AFHANKLIKHEID en 'n TOLERANSIE vir sekere vlakke kan bewerkstellig. Dit is dan wanneer sterker en meer dwelms gebruik moet word.

DWELMMIDDEL EFFEK
PYNSTILLERS :Morfien en Heroïen
  • onderdruk pyn
  • verdoof sintuie
STIMULANTE :Kaffeïne, nikotien, Ecstasy, anti-depressante
  • versnel breinaktiwiteit
  • angstigheid
  • lei tot depressie
KALMEERMIDDELS :Alkohol en slaappille
  • vertraag breinaktiwiteit
  • wilskrag, oordeel en selfbeheer aangetas
  • traagheid en visie-steurings
HALLUSINOGENE :Dagga en LSD
  • gevoel van behaaglikheid
  • ervaar iets wat nie daar is nie
  • skisofrenie

  • Waarom wend jong mense hulle tot dwelms?

Assessering: TOEPASSING

Kon jy jou kennis toepas?

[LU 2.4]

Assessering

LU 2

Konstruksie van Wetenskapkennis

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

Dit is bewys as die leerder:

2.1 betekenisvolle inligting kan onthou;

2.2 inligting kan kategoriseer;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

Memorandum

Senuwees en sensitiwiteit

AKTIWITEIT: TABELLE VOLTOOI - senuwees

1. prikkel/stimulus – reseptor – impuls – sss – impuls – effektor

2. byskrifte: skets brein + neuron

3. Voltooi die funksie tabel:

STRUKTUUR FUNKSIE
Brein Besluitneming; redenasie; geheue; denkprosesse; sintuie;
Rugmurg Refleksreaskies
Motoriese neuron Impulse na spiere en kliere vanaf sss
Sensoriese neuron Impulse na sss vanaf simsorgane

4. a) refleksaksie om oog te smeer met smeermiddel

b) trane dreineer in traanbuis wat agter in keelholte open – ook agterkant van neusholte

c) opening vergroot om meer lig in te laat

d) neusreseptore tydelik uit aksie; tong proe net soet, suur, sout en bitter

Questions & Answers

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
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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
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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
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
Feyisa Reply
Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
types of unemployment
Yomi Reply
What is the difference between perfect competition and monopolistic competition?
Mohammed
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Source:  OpenStax, Natuurwetenskappe graad 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11068/1.1
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