NCERT Solutions of Control and Coordination Class 10
<< NCERT Exemplar Problems and Solution: MCQs 3NCERT Exemplar Problems and Solution: Long Answer Type >>

Control and Coordination

NCERT Exemplar Problems and Solution: Short Answer Type

Question:34- Label the parts (a), (b), (c) and (d) and show the direction of flow of electrical signals in the following figure.

NCERT Exemplar problem Question and Solution 34

Answer: (a) : Sensory neuron, (b): Spinal cord, (c): Motor neuron, (d): Effector

Question:35- Name the plant hormones responsible for the following

(a) Elongation of cells

(b) Growth of stem

(c) Promotion of cell division

(d) Falling of senescent leaves.

Answer: (a): Auxin, (b): Giberellin, (c): Cytokinin, (d): Abscissic acid

Question:36- Label the endocrine glands in the given figure.

NCERT Exemplar problem Question and Solution 36

Answer: (a) Pineal gland, (b): Pituitary gland, (c): Thyroid gland, (d) Thymus

Question:37: In the given figures, (a), (b) and (c), which appears more accurate and why?

NCERT Exemplar problem Question and Solution 37

Answer: Figure (a) appears more accurate because it is showing positive geotropic movement in roots and negative geotropic movement in stem.

Question:38. Label the parts of a neuron in the given figure.

NCERT Exemplar problem Question and Solution 38

Answer: (a): Dendrites, (b): Cyton, (c): Axon, (d): Axon terminals

Question:39. Match the terms of Column (A) with those of Column (B)

NCERT Exemplar problem Question and Solution 39

Question:40. What is a tropic movement? Explain with an example.

Answer: Tropic Movement: The movements which are in a particular direction in relation to the stimulus are called tropic movements. Tropic movements happen as a result of growth of a plant part in a particular direction. For example; the shoot usually grows in the direction of sunlight. This is called positive phototropic movement.

Question:41. What will happen if intake of iodine in our diet is low?

Answer: Iodine is an important constituent of thyroxine. Thyroxine governs the rate of general metabolism in the body. Lack of iodine in the diet can hamper general metabolism; which can lead to many complications. Moreover, deficiency of iodine also leads to a condition which is known as goiter. This manifests in the form of a permanent swelling in the neck.

Question:42. What happens at the synapse between two neurons?

Answer: Transmission of nerve impulses between two neurons takes place at through the synapse. The axon terminal of a neuron releases specialized chemicals; called neurotransmitters. These chemicals travel through the synapse and reach the dendrites of the next neuron. The nerve impulses travel along with the neurotransmitters.

Question:43. Answer the following :

(a) Which hormone is responsible for the changes noticed in females at puberty?

Answer: Oestrogen

(b) Dwarfism results due to deficiency of which hormone?

Answer: Growth hormone

(c) Blood sugar level rises due to deficiency of which hormone?

Answer: Insulin

(d) Iodine is necessary for the synthesis of which hormone?

Answer: Thyroxine

Question:44. Answer the following:

(a) Name the endocrine gland associated with brain?

Answer: Pineal Gland

(b) Which gland secretes digestive enzymes as well as hormones?

Answer: Pancreas

(c) Name the endocrine gland associated with kidneys?

Answer: Adrenal Gland

(d) Which endocrine gland is present in males but not in females?

Answer: Testis


NCERT Solutions of Control and Coordination Class 10
<< NCERT Exemplar Problems and Solution: MCQs 3NCERT Exemplar Problems and Solution: Long Answer Type >>

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