Control and coordination Worksheet-20
Subjective questions:
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State one main function of cerebrum.
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Which part of the brain is most important? Why?
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What is spinal cord? How is it protected?
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Explain why brain and spinal cord are considered as central nervous system.
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Name the hormone which is associated with the metabolism of carbohydrates, proteins, calcium and phosphorus.
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Name the hormone secreted by pancreas. State one function.
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Why is pituitary called the master gland?
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Why hormones are called as 'chemical messengers'?
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Name the hormone secreted by the adrenal gland.
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Give the function of thyroxine hormone.
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How is iodine important to our body?
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Name the part of human body in which the adrenal and pituitary glands are located.
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State the position of thyroid and adrenal glands in man.
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Why are endocrine glands called ductless glands?
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What are the functions of the Hypothalamus?
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Which part of the brain controls the body temperature and blood pressure?
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What is the function of a receptor?
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Name a structure associated with nervous system which is integrated with endocrine system and also secretes hormones.
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Name three stimuli which act on plants.
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What is the stimulus in
(a) Phototropism (b) Geotropism and (c) Chemotropism?
Answer:
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Cerebrum is the region of memory, speech, reasoning, etc.
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Medulla oblongata is the most important part of the brain because it controls all the involuntary actions like heart beat and breathing.
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Spinal cord is a part of the central nervous system and is the centre for reflex actions. It is protected inside the neural cavity of the vertebral column.
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Brain and spinal cord controls all the activities of the body by cranial nerves and spinal nerves.
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Thyroxine.
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Insulin and Glucagon.
Its function is to balance the blood glucose level in the body.
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The pituitary gland controls the activity of other endocrine glands so it is called the master gland.
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Hormones are carried in the blood streams to all parts of the body, so they are called 'chemical messengers'.
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Adrenalin.
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Thyroxine hormone controls the basal metabolism of carbohydrates, fats and proteins in the body.
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Iodine is needed for the synthesis of thyroxine. Its deficiency causes goitre.
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Adrenal - Above kidney and Pituitary- Brain.
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Thyroid- Either side of trachea just below larynx. Adrenal- Above Kidney.
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Endocrine glands are called ductless glands because they do not have any external duct to discharge their secretions into the Wood stream.
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Hypothalamus regulates the secretion of
hormones from pituitary gland.
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Hypothalamus.
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Function of a receptor is to receive stimuli from outside or inside the body and pass the impulses to the nervous system.
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Hypothalamus.
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Light, Gravity and Chemicals.
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(a) Light (b) Gravity (c) Chemicals.