Page 44 - EM BIOLOGY NOTES 10TH CLASS PSR DIGITAL BOOKS

DEFINITIONS
(All chapters important Definitions)

1. Photosynthesis :-  Carbohydrates are synthesized in chloroplasts from

CO and water in the presence of sunlight. This is called photosynthesis.
2 All chapters
important Definitions
light
6CO  12H O   C H O  6O  6H O pl.scan QR
2 2 Chlorophyll 6 12 6 2 2
2. Photolysis/Hill’s reaction :- Photo = light lysis = splitting
 Activated chlorophyll splits the water molecule into ions.

H O  H  OH 
2
 It is discovered by scientist hill. Hence it is called as Hill’s reaction.
3. Malnutrition :-
 Eating of food that does not contain sufficient nutrients is called malnutrition.
Ex :- Protein malnutrition - Kwashiorkor
Protein calorie malnutrition - marasmus
4. Arteries :-
 The blood vessels that carry blood from heart to body parts are called arteries.
5. Veins :-
 The blood vessels that carry blood from body parts to heart are called veins.
6. Blood pressure :-
 Blood flows in blood vessels with a specific pressure called blood pressure.
120
 Normal blood pressure is mm of Hg.
80
 Blood pressure measuring device is sphygmomanometer.
7. Cardiac cycle :-
 The sequential events which occur cyclically in heart is called cardiac cycle.
8. Excretion :-
 The life process which removes waste materials from the body is called excretion.
9. Uremia :-
 If kidneys stop working completely, or body is filled with extra water and waste products,
this condition is called uremic.
10. Dialysis :-
 The process of dialysis is used to filter the blood of a person who suffers from uremia.
11. Sensory Nerve (Afferent nerve) :-
 Nerve that carries information from sense organ to spinal cord (or) brain is called sensory
nerve.
12. Motor Nerve (Efferent nerve) :-
 Nerve that carries information from the brain (or) spinal cord to effector organ is called
motor nerve.
13. Association Nerve :-
 Nerve that links together the sensory and motor nerve is called association nerve.
14. Phototropism :-
 Photo = light, tropism = movement
 Shoots of a plant always grow towards the light. This type of response is called
phototropism.
 Growth of a plant near a window, bend towards sunlight due to phototropism
15. Geotropism :-
 Geo = gravitational force, tropism = movement
 Roots of a plant always grow downwards. This type of response is called Geotropism.

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