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2021-05-06 09:37:46 LIVE NOW REPRODUCTION IN ORGANISMS : NCERT Line to Line Most Important Questions

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2021-05-06 03:55:17 Splenic palpation and percussion

A palpable spleen is at least TWICE its normal size.

Palpate from the right iliac fossa towards the left upper quadrant (ask the child to take deep breaths if appropriate). The edge is usually soft and you will be unable to get above it. The splenic notch is occasionally palpable if markedly enlarged. The spleen should move with respiration.

Measure the degree of extension below the costal margin (in cm) in the mid-clavicular line.

Percuss to delineate the lower border (splenic tissue will be dull to percussion).


Causes of splenomegaly
There are several potential causes of splenomegaly including:

Infection: infectious mononucleosis, malaria, leishmaniasis
Haematological: haemolytic anaemia
Malignancy: leukaemia, lymphoma
Other: portal hypertension, Still’s disease
Apparent splenomegaly: chest hyper-expansion (e.g. bronchiolitis/asthma) Open / Comment

2021-05-05 13:56:31 LIVE NOW 100 NCERT BIOLOGY MCQ IN 60 MINUTES

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2021-05-05 04:42:04 Force and Pressure

When an object is either pushed or a pulled is known as a force.
Motion, generated in an object, is because of an action of a force.
The applied force makes the table move in a given direction.
The strength of a force is commonly expressed by the magnitude.
Force also has direction; likewise, if the magnitude or direction changes, it directly affects the force.
If the force is applied in the direction opposite to the direction of motion, then it results in a decrease in the speed of the object.
If an object is in motion, then external force may change in the state or direction of motion of that object.
The state of motion of an object is explained by its speed and the direction of motion.
The state of ‘rest’ of an object is considered to be the zero speed, as
An object cannot move by itself.
An object cannot change its speed by itself.
An object cannot change its direction by itself.
An object cannot change by itself.
A force may make an object move from rest.
A force may change the speed of a moving object.
A force may change the direction of a moving object.
A force may change the shape of an object.

The force caused by the action of muscles is known as the muscular force.
Some force, decreases the speed of a moving object, is known as ‘friction.’ E.g. moving wheel on road; once the source of force stops working, then wheel stops because of friction.
The force applied by a charged body on another charged or uncharged body is known as ‘electrostatic force.’
Objects or things that fall towards the earth, as earth pulls it towards itself; this force is known as the force of gravity or gravity.
The force of gravity is applicable on all objects. In fact, every object in this universe, irrespective of its size and shape, exerts some force on every other object. It happens only because of the ‘gravitational force.’

Pressure
The force, applied on a unit area of a surface is known as pressure
Pressure= force / area on which it acts.

If the area is smaller, then the pressure on a surface would be greater; e.g. this is the reason that the area of one end of a nail is pointed to exert sufficient pressure and other end is bigger.
This envelop of air is known as the atmosphere that extends up to many kilometers above the surface of the earth.
The pressure exerted by the air is known as atmospheric pressure.
The pressure inside our bodies is exactly equal to the atmospheric pressure and annuls the pressure acting from outside.
Liquids and gases also exert pressure on the walls of their respective containers. Open / Comment

2021-05-04 15:31:59 LIVE NOW CELL CYCLE AND CELL DIVISION : NCERT Based Line to Line MCQ







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2021-05-04 06:30:00 MOST IMPORTANT

*SUMMARY OF #HUMAN_BIOLOGY*

1: Number of Bones *206*
2: Number of Muscles *639*
3: Number of Kidneys *2*
4: Number of Milk Teeth *20*
5: Number of Ribs *24 (12 pair)*
6: Number of Heart Chamber *4*
7: Largest artery *Aorta*
8: Normal blood pressure *120/80mmHg*
9: Ph of Blood *7.35-7.45
10: Number of vertebrae in the Spine *33*
11: Number of vertebrae in the Neck *7*
12: Number of Bones in Middle Ear *6*
13: Number of Bones in Face *14*
14: Number of Bones in Skull *22*
15: Number of Bones in Chest *25*
16: Number of Bones in Arms *6*
17: Number of Muscles in Human Arm *72*
18: Number of Pumps in Heart *2*
19: Largest Organ *Skin*
20: Largest gland *Liver*
21: Biggest cell *female Ovum*
22: Smallest cell *male Sperm*
23: Smallest Bone *Stapes*
24: First transplanted Organ *Heart*
25: Average length of Small Intestine *7m*
26: Average length of Large Intestine *1.5m*
27: Average weight of new Born baby *2.6kg*
28: Pulse rate in One Minute *60-100
29: Normal body temperature *37 C° (98.4 F°)*
30: Average Blood Volume *4 to 5 liters*
31: Life Span of RBC *120 days*
32: Life Span of WBC *10 to 15 days*
33: Pregnancy Period *280 days (40 week)*
34: Number of Bones in Human Foot *33*
35: Number of Bones in Each wrist *8*
36: Number of Bones in Hand *27*
37: Largest Endocrine gland *Thyroid*
38: Largest Lymphatic Organ *Spleen*
39: Largest part of Brain *Cerebrum*
40: Largest & Strongest Bone *Femur*
41: Smallest Muscle *Stapedius (Middle Ear)*
41: Number of Chromosome *46 (23 pair)*
42: Number of Bones in new Born baby *306*
43: Viscosity of Blood *4.5 to 5.5*
44: Universal Donor Blood Group O negative
45: Universal Recipient Blood Group *AB*
46: Largest WBC *Monocyte*
47: Smallest WBC *Lymphocyte*
48: Increase RBC count called *Polycethemia*
49: Blood Bank in the Body is *Spleen*
50: Non Nucleated Blood cell is *RBC*
51: RBC produced in the *Bone Marrow*
52: River of Life is Called *Blood*
53: Normal Blood Cholesterol level *250mg/dl*
54: Fluid part is Blood!



Write These note in your Book Open / Comment

2021-05-03 06:30:02 IMP OF PLANT KINGDOM

1) Isogamous sexual reproduction in algae- Ulothrix (flagellated)
Spirogyra (non-flagellated)

2) Anisogamous sexual reproduction in algae- Udorina

3) Oogamous sexual reproduction in algae- Volvox, Fucus

4) Algin- Brown Algae

5) Carragreen - Red Algae

6) Agar- Gelidium, Gracilaria
(Red algae)

7) Motile asexual spores in algae- Zoospores

8) Laminarin, Mannitol- stored food of Brown algae (complex carbohydrate)

9) Fucoxanthin- Brown Algae

10) Phycoerythrin- Red Algae

11) Floridean Starch Found in Red algae, similar to amylopectin and glycogen

12) The main plant body is a gametophyte- Bryophytes

13) Peat- Sphagnum

14) In liverworts - asexual reproduction by fragmentation or by gemmae (green, multicellular, asexual buds) formation

15) In mosses - asexual reproduction by fragmentation & budding in 2° protonema

16) Microphylls- Selaginella

17) Macrophylls- Fern

18) Heterosporous pteridophytes- Selaginella,
Salvinia, Azolla, Marsilea

19) Vascular plants without seeds- Pteridophytes

20) Aquatic ferns - Azolla, Salvinia, Marsilea

21) Mycorrhiza- Pinus
(symbiotic association with fungi in the roots)

22) Coralloid roots- Cycas
(nitrogen-fixing cyanobacteria in the roots)

23) The tallest gymnosperm- Sequoia (redwood tree)

24) Pinus - Winged shape pollen grain, Monoecious

25) Ginkgo - Living fossil

26) Microscopic angiosperm Wolffia

27) Parallel venation- mostly in Monocotyledons

28) Reticulate venation- Mostly in Dicotyledons

29) The cells of embryo sac are- Haploid

30) Algae showing haplo-diplontic life cycle- Ectocarpus, Polysiphonia, kelps

31) Diplontic life cycle - Fucus

32) Zygotic meiosis - Haplontic life cycle

33) Chlorella - Unicellular alga, protein rich

34) Porphyra, Laminaria and Sargassum - marine algae, used as food

35) Laminaria - Good source of Iodine Open / Comment

2021-05-02 09:13:37 LIVE NOW 100 MCQ IN 60 MINUTES
EXCRETORY PRODUCTS AND THEIR ELIMINATION

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2021-05-02 06:49:14 SOME TERMS RELATED TO EVOLUTION

Adaptation:

Changing to fit a niche or survive in an environment

Anatomy:

Study of the structures of organisms

Artificial Selection:

Characteristics selected by humans

Biogeography:

Study of how species are distributed across the Earth

Biological Species:

Individuals that can interbreed and produce viable offspring

Catastrophism:

Changes in species that happen because of quick and often violent natural phenomena

Cladistics:

Method of classifying species in groups based on ancestral relationships

Cladogram:

Diagram of how species are related

Coevolution:

One species changing in response to changes in another species that it interacts with, particularly predator/prey relationships

Creationism:

Belief that a higher power created all life

Darwinism:

Term commonly used as a synonym for evolution

Descent With Modification:

Passing down traits that might change over time

Directional Selection:

Type of natural selection in which an extreme characteristic is favored


Disruptive Selection:

Type of natural selection that favors both extremes and selects against the average characteristics

Embryology:

Study of the earliest stages of development of an organism

Endosymbiotic Theory:

Currently accepted theory as to how cells evolved

Eukaryote:

Organism made of cells that have membrane-bound organelles

Evolution:

Change in populations over time

Fossil Record:

All known traces of past life ever found

Fundamental Niche:

All available roles an individual can play in an ecosystem

Genetics:

Study of traits and how they are passed down from generation to generation

Gradualism:

Changes in species that happen over long periods of time

Habitat:

Area in which an organism lives

Homologous Structures:

Body parts on different species that are similar and most likely evolved from a common ancestor

Hydrothermal Vents:

Very hot areas in the ocean where primitive life might have begun

Intelligent Design:

Belief that a higher power created life and its changes

Macroevolution:

Changes in populations at the species level, including ancestral relationships

Mass Extinction:

Event in which large numbers of species died out completely

Microevolution:

Changes in species at a molecular or gene level.....

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2021-05-01 19:22:15 FUNCTION OF LARGE
INTESTINE

TRICK

DEWS

1)D- defecation.

2)E- excretion of bivalent ions
like sulphate,
carbonate, phosphate
(NOTE- kidneys can't
excrete bivalent ions ).

3)W- water and drug absorption

4)S - synthesis of Vit-k & vit-
B12 by the microbes of
large intestine

BE READY FOR MORE SIMILAR TRICKS...TOMORROW Open / Comment