Ch-11 Questions 41 to 60

Chapter-11

Transportation in Animals and Plants

Sr NO.	Question	Answer
41.	Do have any relationship between one's heart beat and his pulse rate?	Each heart beat generates one pulse in the arteries and the pulse rate per minute indicates the rate of heart beat.
42.	What rhythmic beating of the heart maintain in our body?	The rhythmic beating of the various chambers of the heart maintain circulation of blood and transport of substances to the different parts of the body.
43.	If sponges and hydra also have blood?	Animals such as sponges and Hydra do not posses any circulatory system. The water in which they live brings food and oxygen as it enters their bodies. The water carries away waste materials and carbon dioxide as it moves out. Thus, these animals do not need a circulatory fluid like the blood.
44.	Carbon dioxide is removed as waste from the body through the _____during exhalation.	Lungs
45.	The undigested food is removed during _____.	Egestion.
46.	What are the waste produced by our body other than undigested food and Carbon dioxide?	When our cells perform their functions, certain waste products are released. These are toxic and hence need to be removed from the body.
47.	What is called excretion connected with waste removal of our body?	The process of removal of wastes produced in the cells of the living organisms is called excretion.
48.	What forms excretory system in our body?	The body parts involved in the process of excretion forms the excretory system.
49.	Who discovered the circulation of blood?	William Harvey in AD 1578-1657
50.	For discovering the fact of circulation of blood William Harvey was ridiculed. In what name he ridiculed by his contemporaries?	Circulator
51.	In which part of the body, waste present in our body is removed?	Kidneys.
52.	How kidneys remove waste from our blood?	When the blood reaches the two kidneys, it contains both useful and harmful substances. The useful substances are absorbed back into the blood. The wastes dissolved in water are removed as urine.
53.	The wastes dissolved in water are removed by kidneys as _____.	Urine.
54.	From the kidneys, the urine goes into the urinary _______ through tube-like ureters.	Bladder.
55.	From the kidneys, the urine goes into the urinary bladder through tube-like ____.	Ureters.
56.	Urine is passed out through the urinary opening at the end of a muscular tube called _____.	Urethra.
57.	What are organs connected with our excretory system?	The kindeys, ureters, bladder and urethra form the excretory system.
58.	An adult human being normally passes about ______of urine in 24 hours.	1 to 1.8 Litres.
59.	What are the contents that constitute Urine?	95% water, 2.5% urea and 2.5% other waste products.
60.	What function sweat serve in our body?	When we sweat, it helps to cool our body.

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