Vardaan Learning Institute

Topic: Control and Coordination

Class: 10 (Science) Type: Bonus Practice Paper Max. Marks: 50
Name:
Date:
SECTION A: OBJECTIVE TYPE QUESTIONS (1 Mark Each)
1. The gap between two neurons is called:
  1. Dendrite
  2. Synapse
  3. Axon
  4. Impulse
2. Which plant hormone promotes cell division?
  1. Auxin
  2. Gibberellin
  3. Cytokinin
  4. Abscisic acid
3. The main function of Abscisic acid in plants is to:
  1. increase the length of cells
  2. promote cell division
  3. inhibit growth
  4. promote growth of stem
4. Which of the following is not an involuntary action?
  1. Vomiting
  2. Salivation
  3. Heart beat
  4. Chewing
5. Iodine is necessary for the synthesis of which hormone?
  1. Adrenaline
  2. Thyroxin
  3. Auxin
  4. Insulin
6. The movement of sunflower in accordance with the path of the sun is due to:
  1. Phototropism
  2. Geotropism
  3. Chemotropism
  4. Hydrotropism
7. Spinal cord originates from:
  1. Cerebrum
  2. Medulla
  3. Pons
  4. Cerebellum
8. Which of the following is both an endocrine and exocrine gland?
  1. Liver
  2. Thyroid
  3. Pancreas
  4. Adrenal
9. Which receptors regulate the taste of food in human beings?
  1. Olfactory receptors
  2. Gustatory receptors
  3. Photo receptors
  4. Phono receptors
10. The brain is protected by a bony box called:
  1. Vertebral column
  2. Cranium
  3. Rib cage
  4. Sternum
Directions (Q11-Q14): In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
11. Assertion (A): The brain is also known as the central nervous system.
Reason (R): The central nervous system controls and regulates the voluntary actions.
12. Assertion (A): A nerve impulse travels only in one direction.
Reason (R): Neurotransmitters are released only at the axon ending of a neuron.
13. Assertion (A): Insulin regulates blood sugar level.
Reason (R): Insufficient insulin causes diabetes.
14. Assertion (A): Plants do not have a nervous system, but they show movements.
Reason (R): Plants use electrical-chemical means to convey information from cell to cell.
SECTION B: SHORT ANSWER QUESTIONS (3 Marks Each)
15. (i) Draw the structure of a neuron and label: (a) Cell body (b) Axon (c) Dendrite.
(ii) State the function of Dendrite.
16. What is a reflex arc? Draw a schematic diagram to show the reflex arc pathway (Receptor -> Sensory Neuron -> Spinal Cord -> Motor Neuron -> Effector).
17. How do auxins promote the growth of a tendril around a support?
18. Differentiate between tropic movements and nastic movements in plants with examples.
19. How does phototropism occur in plants? Explain with the help of a diagram.
20. Name the hormone secreted by the Adrenal gland. Explain its function during emergency situations.
SECTION C: LONG ANSWER QUESTIONS (5 Marks Each)
21. (i) Draw a well-labelled diagram of the Human Brain.
(ii) Mention the functions of the following parts: (a) Cerebellum (b) Medulla (c) Cerebrum.
22. Name the hormones secreted by the following endocrine glands and specify one function of each:
(i) Thyroid
(ii) Pituitary
(iii) Pancreas
(iv) Adrenal
(v) Testes
SECTION D: CASE STUDY (4 Marks)
23. Read the following text and answer the questions:
Diabetes is a condition in which the blood sugar level is higher than normal. It is caused due to the deficiency of a hormone secreted by the pancreas. This hormone helps in regulating blood sugar levels. Treatment includes taking injections of this hormone.

(i) Name the hormone mentioned in the passage. (1 Mark)
(ii) Which gland secretes this hormone? (1 Mark)
(iii) Explain the feedback mechanism that regulates the timing and amount of hormone released with the example of this hormone. (2 Marks)
24. Read the following text and answer the questions:
A person touches a hot object and immediately withdraws their hand. This is an example of a reflex action. Reflex actions are sudden, involuntary responses to stimuli. The pathway is called a reflex arc and primarily involves the spinal cord.

(i) Defined Reflex Action. (1 Mark)
(ii) Where is any Message from the environment detected? (1 Mark)
(iii) Why are reflex arcs evolved in animals? (2 Marks)
"All the best!"