L. Moyo

Moyo L
Grade 12
Lifesciences
12 08 2021

Define the following terms
1. Evolution
2. Theory
3. Hypothesis
4. Population
5. Species

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]

Read the provided notes on ecosystem and ecotourism.
Define the terms and state the benefits of ecotourism.

Lfsc
Moyo L
Gr 10
13/07/21

We continue reading notes on biomes
Read about the 1.aquatic biomes. 2. Biotic factors.

Lfsc
Moyo L
Gr 12
13/07/21
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
Examp
Hot day
-…[Read more]

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]

Moyo L
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:

Glucose level
Water level
Salt level
A task will he provided on the 6th of July 2021…[Read more]

Can you please read the notes provided in this platform regarding the three topics as follows: Biosphere
Biomes
Ecosystem.
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.

Pituitary gland
Thyroid gland
Pancreas
Adrenal gland
Testes
Ovaries

Identify the hormones produced from each gland and the functions of each hormone.

Moyo L
Grade 12
Lifesciences
22/05/2020

Temperature regulation-Thermoregulation.
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]

Gr 12
Lifesciences
Negative feedback mechanism

Apply the negative feedback mechanism on balancing the amounts of
1. Water
2. Salt
3. Carbon dioxide