10th Class biology Chapter wise Important Bit Bank in English Medium

CO ORDINATION

1. All the living organisms respond to _________ .

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stimuli

2. The functional and structural unit of the nervous system is _________ .

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neuron

3. Interruptions in Myelin sheath (made up of Schwann cells) are called ___________.

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nodes of ranvier

4. A point of contact between two neurons is _________.

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synapse

5. _____________ are also called sensory neurons and efferent neurons are motor nerves.

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Afferent neurons

6. Brain is covered by three layers called __________.

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meninges

7. Hypothalamus controls __________ gland.

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pituitary

8. ____________ is the centre for emotions, blood pressure, temperature, hungry and sleep.

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Diencephalon

9. ____________ maintains posture, equilibrium and muscle tone.

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Cerebellum

10. ______________ controls cardiac, respiratory and vasomotor activities.

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Medulla oblongata

11. No. of cranial nerves are _____ pairs and spinal nerves are ____ pairs.

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12, 31

12. The dilation of pupil influenced by _________ nervous system/ adrenal gland.

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autonomous

13. Islets of langerhans (Insulin producer in pancreas) were discovered by _________ in 1868.

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Paul Langerhans

14. In 1905 ________ had coined the term hormones which are secreted by ductless glands.

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Starling

15. __________ is also called Fight and flight hormone.

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Adrenaline

16. __________ secreted by thyroid is responsible for growth rate and metabolic activity.

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Thyroxin

17. Closing of stomata, seed dormancy is caused by ______________.

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Abscissic acid

18. ________ influence the cell elongation, differentiation of shoots and roots.

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Auxins

19. ___________ promote cell division, opening of stomata, anti aging of leaves.

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Cytokinins

20. Ripening of fruits caused by ___________.

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ethylene

21. ___________ promote elongation of stems, breaking the seed dormancy.

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Gibberellins

22. In 1926 ____________ discovered auxins.

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F.W.Went

23. The nastic movement of touch me not plant is called __________ or thigmo tropism.

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thigmonasty

24. Due to _______________ pollen tubes grow to reach ovule.

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chemo tropism

25. The shoots of creepers bends towards sunlight because of ______________.

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photo tropism
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