Language of Nervous System

Q. Define coordination.

Q.

What is the main function of cytokinin?

Q.

What is apical dominance? Which hormone helps to overcome it?

Q.

Name three main parts of a neuron and their functions.

Q.

Name the hormones which help in maintaining blood sugar levels?

Q. Why are trophic movements important for plants?
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Q. Draw a diagram showing the correct positions of pancreas, thyroid gland, pituitary gland, Adrenal gland in human being.

Q.

Which of the following is not a part of the neuron?

1. Lobe

2. Synaptic bulb

3. Cell body

4. Dendrite

Q.

Consider the following statements. Which of them are true?

1. There are three main parts in a neuron - a cell body, an axon and dendrites.

2. The cytoplasm is thick here and contains granular substances called Nissl's bodies.

3. Branched processes termed dendrites arise from the cell body of a neuron.

4. All neurons have only one axon.

1. 1, 2 & 4

2. 1, 2 & 3

3. 2, 3 & 4

4. All

Q.

Demonstrate experiment to show

A phototropism

B.geotropism

C.chemotropism

D.hydrotropism

Q.

Find the odd one out in the series given below:

Salivary gland; Gastric glands; Tear gland; Thyroid gland

1. Salivary gland

2. Gastric glands

3. Tear gland

4. Thyroid gland

Q.

Acromegaly is due to hypersecretion of

1. GH in children

2. GH after adolescence

3. ACTH

4. Thyroid in adults

Q. Iodine is required for the synthesis of which of the following hormones?

1. Adrenaline
2. Insulin
3. Thyroxine
4. Auxin

Q. Identify the hormone responsible for wilting of leaves.

1. Auxin
2. Abscisic acid
3. Gibberellin
4. Cytokinin

Q. Hypersecretion of growth hormone by pituitary results in __________.

1. dwarfism
2. gigantism
3. cretinism
4. myxedema

Q.

Define behaviour.

Q.

Give two functions of nervous system.

Q.

All of the following are examples of an external stimulus except.

1. Hunger

2. Sunlight

3. A loud sound

4. A thorn

Q. Which of the following statements concerning thyroid function are correct?

1. T3 and T4 stimulate the secretion of TSH by the anterior pituitary
2. People who have an underactive thyroid gland have a low BMR
3. Most of the iodine in the body is present in the thyroid gland
4. Thyroid hormones are essential for the early development and maturation of the central nervous system

Q.

What hormone controls sleep?

Q. An increase in the blood sugar level is detected by body cells and the production of insulin is . This results in in blood sugar level.

1. increased
2. decreased
3. an increase
4. a decrease

Q.

What are the various functions of cytokinins.

Q. What is coordination in plants and animals?

Q.

Which of the following statements are true?
(i) Sudden reaction in response to the stimulus is called reflex action.
(ii) Sensory neurons carry signals from the spinal cord to muscles.
(iii) Motor neurons carry signals from receptors to spinal cord.
(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc.

1. (i) and (ii)

2. (i) and (iii)

3. (i) and (iv)

4. (i), (ii) and (iii)

Q. Which of the following hormones help in maintaining the body’s internal clock?

1. Insulin
2. Adrenaline
3. Melatonin
4. Estrogen

Q.

Pneumatophores are ?

1. Negatively geotropic

2. Positively geotropic

3. Negatively phototropic

4. Thigmotropic

Q.

Why only injections of insulin are given and not tablets?

Q. How does pineal gland maintain our biological clock?

Q. Pineal gland produces and secretes the hormone melatonin.

1. True
2. False

Q.

What is the function of the spinal cord?

1. Thinking and memory

2. Balance and equilibrium

3. Reflex actions

4. Movement and locomotion