Transport in Living Organisms

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  • Topic: Blood, Blood type, ABO blood group system
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CH 12
TRANSPORT IN LIVING ORGANISMS

EXERCISE
1. FILL IN THE BLANKS
(i) The principal physiological requirement of all organisms is the maintenance of …………………… (ii) The type of diffusion against the concentration gradient (up hill movement) involving the expenditure of energy is called…………………. (iii) The cell walls of the plants cells keep the……………within limit. (iv) The content of the vacuole of plant cell is called……………. (v) The internal pressure exerted on the cell wall by the water moving into the cell is called………….. (vi) A concentration gradient is establishment between the root hairs and the soil water because of the …………… (vii) The root pressure can move the water to only ……………… (viii) Pull or suction force produced in the xylem vessels, because of the transpiration of water from the leaves is called ……………………. (ix) The hypothesis proposed to explain the mechanisms of translocation of substances through sieve is the …………….. (x) Whole blood minus blood cells is called………….

(xi) Plasma minus fibrinogen is called ……………
(xii) Haemoglobin transports oxygen as a loose reversible compound the………………… (xiii) The average number of leukocytes in man is ……………… (xiv) The function of platelets is to form a ………………... (xv) The circulatory system in arthropods is ………… system. (xvi) The muscles of the heart are called………………… (xvii) The atrio-ventricular apertures are guarded by…………….. (xviii) In the normal young adults, the normal blood pressure is ……….. (xix) The tissues fluid after it has entered the lymphatic vessel is called ……………

Answers
i) Internal aqueous environment
ii) Active transport
iii) Cell contents
iv) Sap
v) Turgor pressure
vi) Osmosis
vii) Small distance
viii) Transpiration pull
ix) Mass flow hypothesis
x) Plasma
xi) Serum
xii) Oxy haemoglobin
xiii) 7000-8000 per mm³
xiv) Clot
xv) Open circulatory
xvi) Cardiac muscles
xvii) Atrio-ventricular valves
xviii) 120/80 mm Hg
xix) Lymph

2. Write weather the statement is"True" or "False” and correct the statement if it is False. (i) Temperature is an important factor in controlling the rate of temperature as it influences the opening and closing of stomata. (ii) Substances, when dissolved in water, become chemically inert. (iii) Atmospheric pressure plays an important role in the life of plants as it provides the forces or tension to pull water and minerals ions up the xylem vessels. (iv) When guard cells are fluid, then inner margins curve apart from each other opening the aperture guarded by them. (v) The transport of synthesized or stored food, from the leaves or the other storage organs to all other parts of the plants is called translocation. (vi) The fluid responsible for transportation of material in many invertebrates is called blood. (vii) The inner atrial and inter ventricular septa prevents the mixing of deoxygenated and oxygenated blood. In human heart (viii) In a human the normal blood pressure is expressed as 180/120 mm Hg (ix) Due to over supply of oxygen, the cardiac muscles, which are extremely sensitive ,will die resulting in heart attack. (x) The person with blood group O is considered to be universal recipients as they have both antigen A and B.

Answers
1. False 2.false3.false 4.True5.True6.False 7.False 8. True9.false10.False

Correct statements
1. Light is an important factor in controlling the rate of transpiration as in influences the opening and closing of stomata 2. Substances when dissolved in water become chemically reactive. 3. Transpiration plays an important role in the life of plants as it provides the forces tension to put water and minerals ions up the xylem vessels. 6. The fluid responsible for transportation of material in many invertebrates is called blood haemoglobin 7. The inter atrial and inter ventricular septa prevents the mixing of deoxygenated blood and oxygenated blood, in human heart. 9. Due to...
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