Chemical Coordination Hormones_Unsolved Paper
Chapter: Control and Coordination | Topic: Chemical Coordination Hormones
CHEMICAL COORDINATION HORMONES_UNSOLVED PAPER
Topic: Chemical Coordination Hormones
Q1.Which type of chemical substance is produced by endocrine glands and carried through the blood to different parts of the body?
- Enzyme
- Hormone
- Antibody
- Digestive juice
Q2.A student suddenly feels frightened after hearing a loud sound. Which hormone prepares the body to deal with such an emergency situation?
- Thyroxine
- Insulin
- Adrenaline
- Growth hormone
Q3.Which gland produces thyroxine?
- Pituitary gland
- Thyroid gland
- Adrenal gland
- Pancreas
Q4.Which hormone helps regulate the amount of sugar present in the blood?
- Insulin
- Adrenaline
- Thyroxine
- Growth hormone
Q5.A person's body does not produce enough insulin. Which body function would be most directly affected?
- Regulation of blood sugar level
- Control of heartbeat during fear
- Development of secondary sexual characters
- Regulation of body balance
Q6.Which statement best describes the role of hormones in the human body?
- They always act only at the place where they are produced.
- They carry electrical messages through neurons.
- They act as chemical messengers involved in coordination and regulation.
- They are produced only by the brain.
Short questions
Q1.What are hormones? Why are they important for coordination in the human body?
Q2. Why is the pituitary gland often considered an important endocrine gland? Mention one hormone associated with it.
Q3. What is the role of thyroxine in the human body? Why is iodine important for its production?
Q4. Imagine that you are about to participate in a school stage performance and suddenly feel nervous. What changes might occur in your body due to the action of adrenaline?
Q5. Differentiate between the functions of insulin and glucagon in maintaining the blood glucose level.
Q6. Why do hormones usually act more slowly than nervous impulses but may produce effects that last for a longer time?
Q1.Explain how chemical coordination takes place in humans through hormones. Include the role of endocrine glands, blood circulation, and target organs in your answer.
Q2.A teenager undergoes several physical changes during adolescence. Explain how hormones are involved in these changes. Mention the role of hormones secreted by the testes and ovaries.
Q3.Explain the role of the following hormones in maintaining proper coordination and regulation in the human body:
Growth hormone
Thyroxine
Adrenaline
Insulin
Write one important function of each.
Q1.During a cricket match, a student suddenly sees a ball coming very fast towards him. His heartbeat increases, breathing becomes faster, and he becomes more alert.
a) Which hormone is likely to be involved in this situation?
b) Why is the release of this hormone useful in such a situation?
Q2.Two students, A and B, are studying the role of hormones.
Using your understanding of endocrine coordination, identify the hormone most closely associated with each observation and state the related function.
Q3.A person has a diet that contains very little iodine for a long period. The thyroid gland is unable to produce sufficient thyroxine.
a) Which body process is likely to be affected?
b) Explain why maintaining an adequate iodine supply is important for normal hormonal coordination.