Control and coordination Worksheet-35

Control and coordination Worksheet-35

True / False:

21. Gibbrellins promotes the wilting and falling of leaves.

22. The main organs of the nervous system are: Brain, Spinal cord and Nerves.

23. The spinal cord is a very thick nerve which runs inside the cavity of backbone in our body.

24. Autonomous Peripheral nervous system containing of all the nerves of the body like cranial nerves, spinal nerves and visceral nerves.

25. The brain is surrounded by three membranes called meanings.

26. The space between the membranes (or meanings) is filled with a pleural fluid.

27. The cerebellum (or forebrain) is the main thinking part of the brain.

28. Medulla controls various involuntary actions such as heart beat, breathing, blood pressure, swallowing.

29. 31 pairs of nerves arise from the spinal cord.

30. The three types of nerves which make up the peripheral nervous system are spinal nerves, cranial nerves and visceral nerves.

31. The neurons carry messages in the form of electrical signals called electrical impulses or nerve impulses.

32. Motor neurons transmit impulses from the sensory cells (or receptors) towards the central nervous system.

33. Hormones are a kind of chemical messengers.

34. Pancreas acts as an endocrine gland and secretes pancreatic juice containing digestive enzymes.

35. Hypothalamus produces 'releasing hormones' and inhibitory hormones'.

36. The growth hormone controls the growth of the human body.

37. Pancreas is attached to the wind pipe in our body.

38. Iodine is necessary for the making of thyroxine hormone by thyroid gland.

39. The deficiency of calcium in the diet of a person produces less thyroxine hormone and causes a disease known as goiter.

40. Adrenal glands are called ‘glands of emergency’.

41. Parathormone hormone regulates calcium and phosphate levels in the blood.

42. Progesterone hormone controls the uterus changes during menstrual cycle.

Answer:

21. False

Explanation: Abscisic acid promotes the wilting and falling of leaves.

22. True

23. True

24. False

Explanation: Peripheral nervous system (containing of all the nerves of the body like cranial nerves, spinal nerves and visceral nerves)

25. True

26. False

Explanation: The space between the membranes (or meanings) is filled with a cerebro spinal fluid.

27. False

Explanation: The cerebrum (or forebrain) is the main thinking part of the brain.

28. True

29. True

30. True

31. True

32. False

Explanation: Sensory neurons transmit impulses from the sensory cells (or receptors) towards the central nervous system

33. True

34. False

Explanation: Pancreas acts as an exocrine gland and secretes pancreatic juice containing digestive enzymes.

35. True

36. True

37. False

Explanation: Thyroid gland is attached to the wind pipe in our body.

38. True

39. False

Explanation: The deficiency of iodine in the diet of a person produces less thyroxine hormone and causes a disease known as goiter.

40. True

41. True

42. True