• Control and Co-ordination - 1 (Class X)
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Control and Co-ordination - 1 (Class X)

Description: Control and Co-ordination - 1
Number of Questions: 15
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Tags: Control and Co-ordination - 1 Control and Coordination in Plants Control and Coordination in Animals Human Brain and Spinal Cord Endocrine Glands and Their Secretions
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Which of the following glands controls the functioning of other endocrine glands?

  1. Pituitary

  2. Thyroid

  3. Adrenal

  4. Parathyroid

Show answer
Correct Option: A
Explanation:

Pituitary gland is called master gland as it controls the functioning of other endocrine glands.

Which of the following sensations is not perceived by skin?

  1. Temperature

  2. Pressure

  3. Pair

  4. Balance

Show answer
Correct Option: D
Explanation:

Semicircular canals of inner ear are responsible for maintaining the balance of the body.

Which of the following glands influences the growth and functioning of thyroid gland?

  1. Parathyroid gland

  2. Adrenal gland

  3. Pituitary gland

  4. Pancreas

Show answer
Correct Option: C
Explanation:

Pituitary gland influences the growth and functioning of thyroid gland. About the size of a pea, the pituitary gland is found at the base of the brain, behind the bridge of your nose. The pituitary gland is very close to another part of the brain, called the hypothalamus.  

Match the following:

 
(A) Pancreas (i) Pregnancy
(B) Pituitary (ii) Diabetes
(C) Thyroid (iii) Gigantism
(D) Progesterone (iv) Goitre

  1. (A) – (ii), (B) – (iii), (C) – (iv), (D) – (i)

  2. (A) – (iii), (B) – (i), (C) – (iv), (D) – (ii)

  3. (A) – (iv), (B) – (iii), (C) – (i), (D) – (ii)

  4. (A) – (ii), (B) – (i), (C) – (iv), (D) – (iii)

Show answer
Correct Option: A
Explanation:

Deficiency of insulin secretion by pancreas causes diabetes. Pituitary hypersecretion causes gigantism. Thyroid enlargement is called goitre. Addison’s disease is a rare, chronic endocrine system disorder in which adrenal glands do not produce sufficient steroid hormones.

Which of the following functions is not performed by light in plants?

  1. Transpiration

  2. Photosynthesis

  3. Growth

  4. Exchange of gases

Show answer
Correct Option: D
Explanation:

Gaseous exchange is independent of light. However, photosynthesis, transpiration and growth of a plant are greatly affected by the presence or absense of light and the intensity of light.

Match the following and choose the correct option.

(a) Vertebral column (1) Shock absorption
(b) Cerebrospinal fluid (2) Precision of voluntary actions
(c) Cerebellum (3) Protection
(d) Hypothalamus (4) Regulation of body temperature

  1. (a) – (3), (b) – (2), (c) – (4), (d) – (1)

  2. (a) – (2), (b) – (1), (c) – (4), (d) – (3)

  3. (a) – (4), (b) – (3), (c) – (1), (d) – (2)

  4. (a) – (3), (b) – (1), (c) – (2), (d) – (4)

Show answer
Correct Option: D
Explanation:
(a) Vertebral column (1) Protection
(b) Cerebrospinal fluid (2) Shock absorption
(c) Cerebellum (3) Precision of voluntary actions
(d) Hypothalamus (4) Regulation of body temperature

Which of the following factors is responsible for the changes associated with puberty?

  1. Secretion of adrenaline in males and thyroxin in females

  2. Secretion of testosterone in males and adrenaline in females

  3. Secretion of testosterone in males and oestrogen in females

  4. Secretion of thyroxin in males and oestrogen in females

Show answer
Correct Option: C
Explanation:

Many dramatic changes are observed in one's appearance as one approaches 10–12 years of age.  These changes are associated with puberty because of the secretion of testosterone in males and oestrogen in females.

Which hormone regulates the level of calcium in blood?

  1. Parathormone

  2. Thyroxine

  3. Growth hormone

  4. Insulin

Show answer
Correct Option: A
Explanation:

Parathyroid glands secrete parathormone, which maintains the level of calcium in blood.

Which hormone is responsible for wilting of leaves?

  1. Cytokinin

  2. Auxin

  3. Abscisic acid

  4. Gibberellin

Show answer
Correct Option: C
Explanation:

Abscisic acid is a plant hormone which inhibits growth. It is responsible for the wilting of leaves.

Which of the following parts of the brain controls heartbeat?

  1. Hypothalamus

  2. Medulla oblongata

  3. Cerebral hemisphere

  4. Cerebellum

Show answer
Correct Option: B
Explanation:

Medulla oblongata controls involuntary actions of the body like heartbeat.

What is the key difference between a reflex action and any other action of the body?

  1. Involvement of brain and lack of conscious control

  2. Involvement of nerves and lack of muscular action

  3. Involvement of spinal cord and conscious control

  4. Involvement of brain and tendons

Show answer
Correct Option: A
Explanation:

Reflex arcs have evolved as efficient ways of functioning in the absence of true thought processes. Thus, reflex action includes involvement of spinal cord and lack of conscious control.

What is the end of the spinal cord called?

  1. Cauda equina

  2. Conus medullaris

  3. Filum terminale

  4. Funiculus

Show answer
Correct Option: A
Explanation:

The end of the spinal cord is called cauda equina.

Which of the following cranial nerves control sound production?

  1. Facial nerves

  2. Trochlear nerves

  3. Vagus nerves

  4. Hypoglossal nerves

Show answer
Correct Option: C
Explanation:

Vagus nerves control sound production.

The correct sequence of meninges from inner to outer side is

  1. arachnoid – duramater – piamater

  2. arachnoid – piamater – duramater

  3. piamater – duramater – arachnoid

  4. piamater – arachnoid – duramater

Show answer
Correct Option: D
Explanation:

The correct sequence of meninges from inner to outer side is piamater – arachnoid – duramater.

Which of the following is promoted by abscisic acid?

  1. Flower initiation

  2. Stem elongation

  3. Detachment of leaves, fruits and flowers

  4. Bud formation

Show answer
Correct Option: C
Explanation:

Detachment of leaves, fruits and flowers is promoted by abscisic acid.

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