12 08 2021
Define the following terms
Theory of evolution according to Lamark
He described his theory according to two laws
A. Law of use and disuse – the frequently used organ of the body become more developed, while the one that is not frequently used…[Read more]
Answer questions on handout about plant hormones
Read the provided notes on ecosystem and ecotourism.
Define the terms and state the benefits of ecotourism.
Life sciences Gr12
19 July 2021
Use your handouts provided when we close to answer all questions on endocrine system and homeostasis. Use your 72pg exbk to answer your questions, remember to write today’s date.
We continue reading notes on biomes
Read about the 1.aquatic biomes. 2. Biotic factors.
Regulation of temperature.
If you read the notes provided in this platform you discover that there is a detailed diagram for the skin, study it but your exam guidelines only requires you to consider 4 things with regard to thermoregulation;
1. Blood capillaries
2. Sweat glands
3. Sweat duct
4. Sweat pore
Read the notes provided on the platform and describe how temperature is regulated to maintain a constant internal environment.
Identify the types of biomes and make a brief description of each biome
Use any reference/book you have to write how salt and carbondioxide are maintained in the body. Write your responses in the 72 pg ex book
Pituitary gland – GH, TSH, FSH, LH, PROLACTIN
Thyroid gland – THYROXINE (stimulated by TSH from Pituitary gland)
Pancreas – Islets of Langerhans(cells) secrete the hormone insulin and glucagon to regulate blood glucose level.
Adrenal gland – Adrenalin (prepares the body against stress/emergency)
*Adrenal gland – secrete the hormone Aldosterone to…[Read more]
Lfsc Gr 12
05 July 2021
Homeostasis is the maintenance of a constant internal environment despite the ever changing external environment.
Using the provided notes on your online, read on how the body maintains the constant environments of the following:
A task will he provided on the 6th of July 2021…[Read more]
Mr L Moyo
Grade 10 Lfsc
05 July 2021
Can you please read the notes provided in this platform regarding the three topics as follows: Biosphere
Consider the definitions of each terminology. The task will be provided which you have to write your answers in your 72 page ex books. I will mark the task when we meet. Remember to write the date and label it as Task 1.
L. Moyo replied to the topic LIFE SCI Gr10 – NOTES Week23 T3 – 22Sep – Ecosystem in the forum LIFE SCIENCES Grade 10 1 year, 5 months ago
The human heart is made of 4 chambers. Name each chamber and write their functions
Identify the hormones produced from each gland and the functions of each hormone.
It is the control of body temperature to keep it constant close to 37 degrees Celsius to allow the body to function normal.
Hypothalamus in the brain is responsible over controlling the body temperature.
The skin is the one that allows the regulation of heat in the…[Read more]
Negative feedback mechanism
Apply the negative feedback mechanism on balancing the amounts of
3. Carbon dioxide
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