Control and coordination Worksheet-15
Subjective questions:
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What is neuron?
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What are phytohormones?
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List two functions performed by ovaries in a human female.
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Write the function of hormone 'thyroxine' in our bodies.
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Name the part of hind-brain which takes part in regulation of respiration.
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Which hormone helps in lowering the level of blood glucose in human beings?
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We suddenly withdraw our hand when a pin pricks. Name the type of response involved in this action.
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Which hormone is responsible for the development of moustache and beard in men?
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Which type of glands in human body secrete hormones? State any one location for them.
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Name the structural and functional units of human nervous system.
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Why is oxytocin called as 'birth hormone'?
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Name two hormones of pancreatic islets.
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Deficiency of which hormone leads to diabetes mellitus?
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Which gland secretes glucagon?
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Name the hormone that promotes motility of sperms.
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Which part of the brain contains respiratory centre?
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Which hormone is known as birth hormone?
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Name the endocrine part of pancreas.
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Name one gland in human body which secretes digestive enzymes as well as hormones.
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Name the hormone which induces milk secretion.
Answer:
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Neuron is the largest cell in the body. It is an elongated branched cell having three components - Cell body, Dendrites and Axon. Neurons are, therefore, the structural and functional unit of the nervous system.
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Phytohormones can be defined as a chemical substance which is produced naturally in plants and are capable of translocation and regulating one or more physiological processes when present in low concentration.
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The two functions performed by ovaries in a human female are as follows:
(i) It secretes two female sex hormones, estrogen and progesterone.
(ii) It produces female gametes i.e., ova.
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Thyroxine regulates the metabolism of carbohydrates, fats and proteins in our body.
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The part of hind-brain which takes part in regulation of respiration is Pons.
Insulin helps in lowering the level of blood glucose in human beings.
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Reflex action or response.
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The hormone responsible for the development of moustache and beard in men is Testosterone.
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Endocrine glands in human body secrete hormones.
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The endocrine glands are located in different parts of the body e.g., hypothalamus is present in the brain.
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The structural and functional units of human nervous system are neurons.
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Oxytocin is called as 'birth hormone' because it stimulates the contractions of the smooth muscles of uterus at the end of pregnancy and helps in child birth.
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Glucagon and Insulin.
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Insulin.
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Pancreatic Islets of Langerhans.
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Testosterone.
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Pons of Hind Brain.
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Oxytocin
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Islets of Langerhans.
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Pancreas.
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Prolactin.