-the muscles which bring about these movements are called biceps and triceps
-biceps are attached to scapula and radius for bending
-triceps are attached to scapula, humerus and ulna for stretching
-when the biceps contracts, it pulls the radius (forearm) and the hand bends
-the triceps relaxes at the same time
-when the triceps contracts and biceps relaxes(extends) the arm is stretched
-biceps flexes the arm (flexor) and triceps extend(extensor muscle) the arm
Githiari answered the question on November 8, 2017 at 05:49
- In an experiment to investigate a factor affecting photosynthesis a potted plant was kept in the dark overnight and then exposed to sunlight with the...(Solved)
In an experiment to investigate a factor affecting photosynthesis a potted plant was kept in the dark overnight and then exposed to sunlight with the leaf covered in a transparent flask containing sodium hydroxide pellets
a)Why was the potted plant kept in the dark?
b)State the factor being investigated in the experiment
c)State the results obtained in the leaf
d)Explain the results
Date posted: November 7, 2017. Answers (1)
- State the pH in the following parts of the digestive system (a)Mouth (b)Stomach (c)Duodenum(Solved)
State the pH in the following parts of the digestive system
a)Mouth
b)Stomach
c)Duodenum
Date posted: November 7, 2017. Answers (1)
- State two disadvantages of using an electron microscope(Solved)
State two disadvantages of using an electron microscope
Date posted: November 7, 2017. Answers (1)
- State the functions of the following organs in digestion: (a)Tongue (b)Oesophagus(Solved)
State the functions of the following organs in digestion:
a)Tongue
b)Oesophagus
Date posted: November 7, 2017. Answers (1)
- Explain how cigarette smoking causes lung cancer(Solved)
Explain how ciggarete smoking causes lung cancer
Date posted: November 7, 2017. Answers (1)
- What are the adaptations of the xylem vessels in the transportation of water in a plant?(Solved)
What are the adaptations of the xylem vessels in the transportation of water in a plant?
Date posted: November 7, 2017. Answers (1)
- With suitable examples, distinguish between homologous and analogous structures.(Solved)
With suitable examples, distinguish between homologous and analogous structures
Date posted: November 7, 2017. Answers (1)
- State and explain any five evidences of organic evolution(Solved)
State and explain any five evidences of organic evolution.
Date posted: November 7, 2017. Answers (1)
- Describe how a male reproductive system is adapted to its functions.(Solved)
This is an essay on human male reproductive system.
Date posted: November 7, 2017. Answers (1)
- List four forms of diabetes mellitus(Solved)
List four forms of diabetes mellitus
Date posted: November 4, 2017. Answers (1)
- Explain how structural features in terrestrial plants affect their rate of transpiration(Solved)
Explain how structural features in terrestrial plants affect their rate of transpiration
Date posted: November 4, 2017. Answers (1)
- Outline the characteristics of meristematic tissue(Solved)
Outline the characteristics of meristematic tissue
Date posted: November 3, 2017. Answers (1)
- Explain what happens to a young growing seedling when exposed to unidirectional source of light(Solved)
Explain what happens to a young growing seedling when exposed to unidirectional source of light
Date posted: November 3, 2017. Answers (1)
- List three types of muscles(Solved)
List three types of muscles
Date posted: November 3, 2017. Answers (1)
- Explain why individual with smaller sizes require more energy per kg of body weight than those with large sizes(Solved)
Explain why individual with smaller sizes require more energy per kg of body weight than those with large sizes
Date posted: November 3, 2017. Answers (1)
- Identify the type of mutation represented by the following pairs of words
Shirt instead of skirt
Hoping instead of shopping
Eating instead of tea
(Solved)
Identify the type of mutation represented by the following pairs of words
Shirt instead of skirt
Hoping instead of shopping
Eating instead of tea
Date posted: November 3, 2017. Answers (1)
- State three functions of the mammalian blood other than transport(Solved)
State three functions of the mammalian blood other than transport
Date posted: November 2, 2017. Answers (1)
- State the role of juvenile hormone in the development of insects(Solved)
State the role of juvenile hormone in the development of insects
Date posted: November 2, 2017. Answers (1)
- Name the hormone responsible for moulting in insects (Solved)
Name the hormone responsible for moulting in insects
Date posted: November 2, 2017. Answers (1)
- List any distinguishing features of the class arachnida(Solved)
List any distinguishing features of the class arachnida
Date posted: November 2, 2017. Answers (1)