Case Study Questions Class 7 Science Chapter 11 Transportation in Animals and Plants
CBSE Class 7 Case Study Questions Science Transportation in Animals and Plants. Important Case Study Questions for Class 7 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Transportation in Animals and Plants.
At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks.
CBSE Case Study Questions Class 7 Science Transportation in Animals and Plants
Case study 1
Blood is the fluid whichflows in blood vessels. It transportssubstances like digested food from thesmall intestine to the other parts of thebody. It carries oxygen from the lungsto the cells of the body. It also transports
Waste for removal from the body. Blood is composed of afluid, called plasma in which differenttypes of cells are suspended. One type of cells are the red bloodcells (RBC) which contain a red pigmentcalled Hemoglobin.
Hemoglobinbinds with oxygen and transports it toall the parts of the body and ultimatelyto all the cells. It will be difficult toprovide oxygen efficiently to all the cellsof the body without hemoglobin. Thepresence of hemoglobin makes bloodappear red.
Que. 1) Which fluid flows in blood vessels?
(a) Plasma
(b) RBC
(c) Blood
(d) All of the above
Que. 2) Haemoglobin binds with……………………………………………………………………………….and transport it to all the parts of body and to all the…………………………………………………………………………………….
(a) Tissues, cells
(b) Organs, cells
(c) Muscles, cells
(d) Oxygen,cells
Que. 3) What makes blood appear red in colour?
(a) Antigen
(b) Iron
(c) Haemoglobin
(d) None of the above
Que. 4) What role does blood play in the body?
Que. 5) How is oxygen transported in the body?
Answer Key
Que. 1)(c) Blood
Que. 2) (d) Oxygen, cells
Que. 3) (c) Haemoglobin
Que. 4) Answer: Blood plays an important role in the body by transporting oxygen, nutrients from intestine, waste products etc to different parts of the body.
Que. 5) Answer: oxygen is transported to all the parts of the body with the help of a carrier molecule called as haemoglobin.
Case study 2
There are different types of blood vesselsin the body. You know that duringinhalation a fresh supply of oxygen fillsthe lungs. Oxygen has to be transportedto the rest of the body.Also, the blood picks up the wastematerials including carbon dioxide fromthe cells. This blood has to go back tothe heart for transport to the lungs forremoval of carbon dioxide as you have. So, two types ofblood vessels, arteries and veins arepresent in the body. Arteries carry oxygen-rich bloodfrom the heart to all parts of the body. Since the blood flow is rapid and at ahigh pressure, the arteries have thickelastic walls.
The number of beats per minuteis called the pulse rate. A restingperson, usually has a pulse rate between72 and 80 beats per minute. Veins are the vessels which carrycarbon dioxide-rich blood from all partsof the body back to the heart. The veinshave thin walls. There are valves presentin veins which allow blood to flow onlytowards the heart.
Que. 1) How many types of blood vessels are present in the human body?
(a) 4
(b) 5
(c) 7
(d) 2
Que. 2) What is the breathing rate of a normal resting person?
(a) 75-80
(b) 90
(c) 100
(d) 50
Que. 3) …………………………………………………………………………..………..is present in the veins that allow only unidirectional flow of blood in the human body.
(a) Plasma
(b) Valves
(c) Joint
(d) All of the above
Que. 4) Which blood vessel carry fresh oxygen form heart to all the parts of the body?
Que. 5) Why does the arteries have thick elastic walls?
Answer Key
Que. 1)(d) 2
Que. 2) (a) 75-80
Que. 3) (b) Valves
Que. 4) Answer: Arteries is the blood vessel which carry fresh oxygen from heart to all the parts of the body.
Que. 5) Answer: The blood flow is very fast and at very high pressure so to prevent leakage in blood vessels arteries have thick elastic wall.
Case study 3
The heart is an organ which beatscontinuously to act as a pump for thetransport of blood, which carries othersubstances with it.Imagine a pump working foryears without stopping! Absolutelyimpossible. Yet our heart works like apump non-stop.The heart is located in the chestcavity with its lower tip slightly tiltedtowards the left. Heart is roughlythe size of fist.The heart has four chambers.
The two upper chambers arecalled the atria (singular: atrium) and the two lower chambers are called theventricles. The partitionbetween the chambers helps to avoid mixing up of blood rich in oxygen withthe blood rich in carbon dioxide.
Que. 1) Which organs acts as a pump in the body to transport blood to all the different tissues, muscles and cells?
(a) Lungs
(b) Liver
(c) Heart
(d) All of the above
Que. 2) The two upper chambers of heart are called as…………………………………………………………………………….…………….
(a) Ventricles
(b) Atria
(c) Lungs
(d) None
Que. 3) The size of heart equivalent to which part of the human body?
(a) Lungs
(b) Kidney
(c) Fist
(d) Hands
Que. 4) How many chambers does heart have and name them?
Que. 5) Does the heart ever get fatigued in the entire life time of a human?
Answer Key
Que. 1)(c) Heart
Que. 2) (b) Atria
Que. 3) (c) Fist
Que. 4) Answer: Heart have 4 chambers. 2 of which are named atria and other 2 are named ventricles.
Que. 5) Answer: No the heart never get fatigued in the entire life time of a human.
Case study 4
The walls of the chambers of the heartare made up of muscles. These musclescontract and relax rhythmically. Thisrhythmic contraction followed by itsrelaxation constitute a heartbeat.Remember that heartbeats continueevery moment of our life. If you placeyour hand on the left side of the chest, one can feel his or her heartbeat.The doctorfeels your heartbeats with the help ofan instrument called a stethoscope.
A doctor uses the stethoscope as adevice to amplify the sound of the heart.It consists of a chest piece that carries asensitive diaphragm, two ear pieces anda tube joining the parts. Doctors canget clues about the condition of heart by listening through astethoscope.
Que. 1) The walls of the chambers of……………………………………………………………………………….are made up of…………………………………………………………………………….……..
(a) Heart, muscles
(b) Lungs, muscles
(c) Kidney, fibres
(d) Heart, fibres
Que. 2) Which instrument is used by a doctor to listen or amplify the sound of heart?
(a) MRI
(b) Stethoscope
(c) BP machine
(d) None
Que. 3) In which side of the chest a person can feel his or her heart beat?
(a) Right side
(b) Left side
(c) Upper left
(d) Lower left
Que. 4) What constitute a heartbeat?
Que. 5) How can a doctor judge condition of heart?
Answer Key
Que. 1)(a) Heart, muscles
Que. 2) (b) Stethoscope
Que. 3) (b) Left side
Que. 4) Answer: The rhythmic contraction and relaxation of heart muscles constitute a heartbeat.
Que. 5) Answer: A doctor can judge condition of heart by listening to the heart beats of a person with the help of a stethoscope.
Case study 5
Thewastes dissolved in water are removedas urine. From the kidneys, the urinegoes into the urinary bladder through tube-like ureters. It is stored in thebladder and is passed out through theurinary opening at the end of a
Muscular tube called urethra.The kidneys, ureters, bladder andurethra form the excretory system.An adult human being normallypasses about 1–1.8 L of urine in 24hours. The urine consists of 95% water,2.5% urea and 2.5% other wasteproducts.We have all experienced that we sweaton a hot summer day.The sweat contains water and salts. Boojho hasseen that sometimes in summer, whitepatches are formed on our clothes,especially in areas like underarms.These marks are left by salts present inthe sweat.
The way in which waste chemicalsare removed from the body of theanimal depends on the availabilityof water. Aquatic animals like fishes,excrete cell waste as ammonia whichdirectly dissolves in water. Someland animals like birds, lizards,snakes excrete a semi-solid, whitecoloured compound (uric acid). Themajor excretory product in humansis urea.
Que. 1) Which organ is the part of excretory system given below?
(a) Kidney
(b) Heart
(c) Lungs
(d) All of the above
Que. 2) How many litres of urine a normal human adult passes in 24hrs?
(a) 1-1.8L
(b) 5L
(c) 3L
(d) 2L
Que. 3) ………………………………………………………………..…………animals like fishes excrete cell waste as…………………………………………………………….……..which directly dissolves in water.
(a) Aquatic, ammonia
(b) Aquatic, urea
(c) Aquatic, uric acid
(d) Aquatic, Nitrate
Que. 4) What is the composition of urine?
Que. 5) Name the animals which excrete white coloured compound and also give the name of white compound.
Answer Key
Que. 1)(a) Kidney
Que. 2) (a) 1-1.8L
Que. 3) (a) Aquatic, ammonia
Que. 4) Answer: The urine contains 95% of water, 2.5% of urea and 2.5% of other waste products produced in the human body.
Que. 5) Answer: Animals like snake, bird, lizards excrete white coloured compound and the compound name is uric acid.
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