Chapter 7 : Control & Coordination

Name of the Student : *

School : *

District : *

1) Which of the following is a plant hormone? *

1 point

(a) Insulin

(b) Thyroxin

(c) Oestrogen

(d) Cytokinin.

2) The gap between two neurons is called a : *

1 point

(a) dendrite

(b) synapse

(c) axon

(d) impulse

3) The brain is responsible for : *

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(a) thinking

(b) regulating the heart beat

(c) balancing the body

(d) all of the above

4) Control and coordination are the functions of : *

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(a) digestive system

(b) respiratory system

(c) nervous system and endocrine system

(d) circulatory system

5) The responses of the nervous system can be classified as : *

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(a) reflex action

(b) voluntary action

(c) involuntary action

(d) All the above

6) The nervous system uses _____ impulses to transmit messages : *

1 point

(a) chemical

(b) mechanical

(c) electrical

(d) physical

7) Which of the following statements is correct about receptors? *

1 point

(a) Gustatory receptors detect taste while olfactory receptors detect smell

(b) Both gustatory and olfactory receptors detect smell

(c) Auditory receptors detect smell and olfactory receptors detect taste

(d) Olfactory receptors detect taste and gustatory receptors smell

8) Electrical impulse travels in a neuron from : *

1 point

(a) Dendrite → axon → axonal end → cell body

(b) Cell body → dendrite → axon → axonal end

(c) Dendrite → cell body → axon → axonal end

(d) Axonal end → axon → cell body → dendrite

9) In a synapse, chemical signal is transmitted from : *

1 point

(a) dendritic end of one neuron to axonal end of another neuron

(b) axon to cell body of the same neuron

(c) cell body to axonal end of the same neuron

(d) axonal end of one neuron to dendritic end of another neuron

10) In a neuron, conversion of electrical signal to a chemical signal occurs at : *

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(a) cell body

(b) axonal end

(c) dendritic end

(d) axon

11) Which is the correct sequence of the components of a reflex arc? *

1 point

(a) Receptors→ Muscles→ Sensory neuron→ Motor neuron→ Spinal cord

(b) Receptors→ Motor neuron → Spinal cord→ Sensory neuron → Muscle

(c) Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle

(d) Receptors→ Sensory neuron → Spinal cord→ Motor neuron → Muscle

12) Which of the following statements are true? (i) Sudden action in response to something in the environment is called reflex action (ii) Sensory neurons carry signals from 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 point

(a) (i) and (ii)

(b) (i) and (iii)

(c) (i) and (iv)

(d) (i) , (ii) and (iii)

13) Posture and balance of the body is controlled by : *

1 point

(a) cerebrum

(b) cerebellum

(c) medulla

(d) pons

14) Spinal cord originates from : *

1 point

(a) cerebrum

(b) medulla

(c) pons

(d) cerebellum

15) The movement of shoot towards light is : *

1 point

(a) geotropism

(b) hydrotropism

(c) chemotropism

(d) phototropism

16) The main function of abscisic acid in plants is to : *

1 point

(a) increase the length of cells

(b) promote cell division

(c) inhibit growth

(d) promote growth of stem

17) Which of the following plant hormone is not associated with growth of plant? *

1 point

(a) Abscisic acid

(b) Gibberellins

(c) Cytokinins

(d) Auxin

18) Iodine is necessary for the synthesis of this hormone? *

1 point

(a) Thyroxine

(b) Adrenaline

(c) Insulin

(d) Testosterone

19) Choose the incorrect statement about insulin: *

1 point

(a) It is produced from pancreas

(b) It regulates growth and development of the body

(c) It regulates blood sugar level

(d) Insufficient secretion of insulin will cause diabetes

20) Select the mis-matched pair : *

1 point

(a) Adrenaline : Pituitary gland

(b) Testosterone: Testes

(c) Estrogen : Ovary

(d) Thyroxin : Thyroid gland

21) The growth of tendril in pea plants is due to : *

1 point

(a) effect of light

(b) effect of gravity

(c) elongation of tendrillar cells that are away from the support

(d) rapid cell divisions in tendrillar cells in contact with the supp

22) The growth of pollen tubes towards ovules is an example for : *

1 point

(a) hydrotropism

(b) chemotropism

(c) geotropism

(d) phototropism

23) The movement of sunflower in accordance with the path of sun is due to : *

1 point

(a) phototropism

(b) geotropism

(c) chemotropism

(d) hydrotropism

24) The substance that triggers the fall of mature leaves and fruits from plants is due to : *

1 point

(a) auxin

(b) gibberellin

(c) abscisic acid

(d) cytokinin

25) Involuntary actions in the body are controlled by : *

1 point

(a) Cerebrum

(b) Cerebellum

(c) Pons

(d) Medulla

26) Which of the following is not an involuntary action? *

1 point

(a) Vomiting

(b) Chewing

(c) Heart beat

(d) Salivation

27) What is the correct direction of flow of electrical impulses? *

1 point

(a)

(b)

(c)

(d)

28) Which statement is not true about thyroxin? *

1 point

(a) Iron is essential for the synthesis of thyroxin

(b) It regulates carbohydrates, protein and fat metabolism in the body

(c) Thyroid gland requires iodine to synthesise thyroxin

(d) Deficiency of Thyroxin causes Goiter

29) Dwarfism results due to: *

1 point

(a) Excess secretion of thyroxin

(b) Less secretion of growth hormone

(c) Less secretion of adrenaline

(d) Excess secretion of growth hormone

30) Dramatic changes of body features associated with puberty are mainly because of secretion of : *

1 point

(a) oestrogen from testes and testosterone from ovary

(b) estrogen from adrenal gland and testosterone from pituitary gland

(c) testosterone from testes and estrogen from ovary

(d) testosterone from thyroid gland and estrogen from pituitary gland

31) A doctor advised a person to take an injection of insulin because : *

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(a) his blood pressure was low

(b) his heart was beating slowly

(c) he was suffering from goitre

(d) his blood sugar level was high

32) The hormone which increases the fertility in males is called : *

1 point

(a) oestrogen

(b) testosterone

(c) insulin

(d) growth hormone

33) The unpaired endocrine glands is : *

1 point

(a) Adrenal

(b) Testes

(c) Pituitary

(d) Ovary

34) The growth of roots towards water is : *

1 point

(a) phototropism

(b) geotropism

(c) chemotropism

(d) hydrotropism

35) Gibberellin is responsible for : *

1 point

(a) elongation of cells

(b) growth of stem

(c) promotion of cell division

(d) falling of senescent leaves

36) Cytokinin is responsible for : *

1 point

(a) elongation of cells

(b) growth of stem

(c) promotion of cell division

(d) falling of senescent leaves

37) Which gland secretes digestive enzymes as well as hormones? *

1 point

(a) Pancreas

(b) Adrenal

(c) Thyroid

(d) Pituitary

38) The Central Nervous System constitutes : *

1 point

(a) Brain & Spinal Cord

(b) Cranial nerves & Spinal nerves

(c) Sympathetic nerves & Parasympathetic nerves

(d) PNS and ANS

39) The structure that controls reflex actions is: *

1 point

(a) Medulla

(b) Cerebrum

(c) Cortex

(d) Spinal Cord

40) Which figure appears more accurate ? : *

1 point

(a)

(b)

(c)

(d)

STRUCTURE OF NEURON :

HUMAN BRAIN :

REFLEX ARC :

ENDOCRINE GLANDS IN MALE :

ENDOCRINE GLANDS IN FEMALE :

GOPALA RAO C K

GHS (RMSA) THORALAKKI, MALUR TALUK, KOLAR DISTRICT 563137