Transport in Living Organisms

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

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