1. Skin
The skin is made up of dermis and epidermis. Epidermis is made up of malpighian layer which gives colour to the skin and also protect against harmful ultraviolet rays from the sun. Cornified layer reduces loss of water by evaporation it is thickest in areas of high friction like palms of hand and soles of feet but thinnest on lips and eyeballs. Dermis contain blood vessels which help in temperature regulation. Nerve endings create an awareness within the body of changes in temperature, pressure and touch. Subcutaneous layer act as fat storage and therefore insulates body against heat loss. Sweat gland is important in that when body temperature increases, the sweat gland increase the rate of sweat production. Water in the sweat evaporates by absorbing heat from the body, resulting to cooling effect.
2. Liver
The liver carries out many metabolic reaction some being endothermic while others are exothermic. Detoxification is a helpful process done by the liver to eliminate such as toxic substances in harmless forms. The liver receives harmful substances by way of drugs, food or drink. Detoxification is done by oxidation, reduction, combination with other substances.
3. Hypothalamus
This is a region which is small and is between the cerebrum and cerebellum parts of the brain which acts as a thermo regulatory centre. External temperature affecting the body is detected by thermo receptors in the skin. Thermo receptors relay impulse to the hypothalamus through the sensory nerves. Once the temperature changes are detected by the hypothalamus the meditation takes place in the hypothalamus whenever temperature rises or lowers it sends the impulse to the hypothalamus.
eddynightsy answered the question on April 20, 2018 at 08:52
- Differentiate between: 1. Heterotrophic and autotrophic modes of nutrition. 2. Photosynthesis and chemosynthesis(Solved)
a) Differentiate between:
1. Heterotrophic and autotrophic modes of nutrition.
2. Photosynthesis and chemosynthesis
b) Explain the importance of the following in photosynthesis.
1. Guard cells
2. Xylem tissues
c) State any three adaptations of a leaf to photosynthesis.
Date posted: April 20, 2018. Answers (1)
- Briefly explain the following modes of nutrients; 1. Saprophytism 2. Mutualism 3. Holozoic(Solved)
Briefly explain the following modes of nutrients;
1. Saprophytism
2. Mutualism
3. Holozoic
Date posted: April 20, 2018. Answers (1)
- Explain the adaptations of respiratory surfaces in plants.
(Solved)
Explain the adaptations of respiratory surfaces in plants.
Date posted: April 19, 2018. Answers (1)
- Describe the digestion in the Ileum.(Solved)
Describe the digestion in the Ileum.
Date posted: April 19, 2018. Answers (1)
- State the characteristics of movable joints (Solved)
State the characteristics of movable joints
Date posted: April 19, 2018. Answers (1)
- (i) what is a joint? (ii) State the functions of joints (iii) Name the main types of joints (Solved)
i) What is a joint?
ii) State the functions of joints
iii) Name the main types of joints
Date posted: April 19, 2018. Answers (1)
- Describe the bones that form the appendicular skeleton (Solved)
Describe the bones that form the appendicular skeleton
Date posted: April 19, 2018. Answers (1)
- Describe how the various vertebrae are adapted to their functions (Solved)
Describe how the various vertebrae are adapted to their functions
Date posted: April 19, 2018. Answers (1)
- Describe the formation of urine until it is eventually removed from human body(Solved)
Describe the formation of urine until it is eventually removed from human body.
Date posted: April 19, 2018. Answers (1)
- Name the bones of the vertebral column (Solved)
Name the bones of the vertebral column
Date posted: April 19, 2018. Answers (1)
- (i) State the functions of the vertebral column (ii) State the general characteristics of vertebrae (Solved)
i) State the functions of the vertebral column
ii) State the general characteristics of vertebrae
Date posted: April 19, 2018. Answers (1)
- Describe how carbon dioxide produced by respiring muscle cells reaches the alveolar cavities in mammalian lungs(Solved)
Describe how carbon dioxide produced by respiring muscle cells reaches the alveolar cavities in mammalian lungs.
Date posted: April 19, 2018. Answers (1)
- Name three stains used in microscopy(Solved)
Name three stains used in microscopy.
Date posted: April 18, 2018. Answers (1)
- Name the main parts of the vertebral column giving the types of bones found in each part (Solved)
Name the main parts of the vertebral column giving the types of bones found in each part
Date posted: April 18, 2018. Answers (1)
- Explain how a finned fish is adapted to locomotion in water(Solved)
Explain how a finned fish is adapted to locomotion in water.
Date posted: April 18, 2018. Answers (1)
- Explain how a fish is adapted to living in water (Solved)
Explain how a fish is adapted to living in water
Date posted: April 18, 2018. Answers (1)
- Explain the importance of having an endoskeleton (Solved)
Explain the importance of having an endoskeleton.
Date posted: April 18, 2018. Answers (1)
- Give the reasons why support is necessary in animals(Solved)
Give the reasons why support is necessary in animals.
Date posted: April 18, 2018. Answers (1)
- Explain how support in plants is achieved(Solved)
Explain how support in plants is achieved
Date posted: April 18, 2018. Answers (1)
- State the importance of support in plants(Solved)
State the importance of support in plants.
Date posted: April 18, 2018. Answers (1)