.

2021-06-24 11:25:54 GREAT NEWS
Aapka study buddy ab Telegram par!!

https://t.me/snapsolve_bot?start=source_bot38

Directly paayiye instant jawab telegram bot par.
Aur unlock karo dhero rewards! Open / Comment

2021-06-02 09:36:43 Important One Liners on Structure of a Sperm
------------------------------------------------------------------------

The body of sperm is covered by plasma membrane or cell membrane.

Sperm can be divided into 4 parts namely: head, neck, middle piece and tail. The haploid nucleus is present in the head. Acrosome is the cap-like structure of head which helps it to fertilize the ovum.

Acrosome is the cap-like structure present on the anterior-most end of the sperm head. It is filled with numerous enzymes like hyaluronic acid which are released upon encounter of egg in female oviduct. These enzymes function by digesting the membrane, thus allowing penetration of head and further release of male nuclei.

Mitochondria are present in the middle piece of the sperm. They are essential for producing energy required for movement of tail. This is essential for movement through the genital tract and oviduct before sperm encounters the egg. Rakesh might have less or poorly functional mitochondria, which prevent his normal count of sperms from moving along the genital tract.

Sperm count is essential as it determines the probability of a sperm encountering the egg. Sperm motility is essential to ensure the passage of sperms through the genital tract, uterus and oviduct. Sperm production rate determines the number of healthy coitus a male can have. Sperm height is not a determining factor of fertility.

Low sperm count leads to lesser amount of sperms entering the genital tract and passing successfully before encountering the egg in the oviduct. Thus less sperm count leads to lesser chances of fertilization and might result in infertility.

Seminiferous tubules are lined by spermatogonia and Sertoli cells. Spermatogonia undergo meiosis to produce sperm that are nourished by Sertoli cells.

Sperms are released out from seminiferous tubules facilitated by seminal plasma composed of secretions from epididymis, vas deferens, seminal vesicle, and prostate.

Seminal plasma helps in the motility and maturation of sperm. Secretions produce it from vas deferens, epididymis, seminal vesicle and prostate.

Testosterone secreted by Leydig cells stimulates spermatogenesis. It also acts on accessory ducts and glands and maintains their proper function. Release of sperms and semen is not coordinated by testosterone.


DISSCUSION GROUP - @AIM_TO_AIIMS2021 Open / Comment

2021-06-01 15:53:13 1: Anti Histamine = Use in Allergy
2: Analgesic = Pain Killer
3: Anti Pyretic = Fever
4: Anti Septic = Pus
5: Anti Biotic = Infection
6: Anti Anaemia = Low blood
7: Anti Emetic = Vomting
8: Anti Acid = Stomach Burn
9: Anti Flantulents = Gases
10: Anti Spasmodic = Abdominal pain
11: Anti Anginal = Cardiac pain
12: Anti Arhthnic = Cardiac Activity
13: Ant Hypertensive = BP
14: Anti Lipemic = Chlosterol+Lipids
15: Anti Coagulant = Norrowing of Blood
16: Anti Depressant = Depression
17: HYPONOTIC = For Sleep
18: Anti Psychotic = For Psychosis
19: Anti Anxiety = For Anxiety
20: Anti Parkinson = For Parkinson's Open / Comment

2021-05-28 09:11:20 3. Formulas related to Power
P = Fv
P = E/t
P = n(mgh/t)
P = Fd/t
P = mv²/2t

4. Formulas related to distance, displacement, velocity and accelration
d = vt
d = at²
d = (vf + vi/2) ×t
d = 5t² (for distance in 'n' seconds)
d = 5(2tn - 1) (for distance in 'nth' second)
d = 1/2 mv²/F
d = vit + 5t²
d = v × underroot 2H/g
d = vt = x°wt = x°2pi/T × t = x°2pift
x = x° Sin wt
x = x° Sin (underroot k/m) t
vf = vi + at
2as = vf² - vi²
2as = (vi + at)² - vi²
2as = vf² - (vf - at) ²
v = underroot Vfx² + Vfy²
v = Power/Force
v = 2×K.E/momentum (k.e = 1/2 Pv)
v² = 2×Power×time/mass (P = mv²/2t)
v = underroot 2as
v = underroot gr (speed at highest point in a verticle circle)
v = underroot 5gr (speed at lowest point in a verticle circle)
v² = 2FS/m
v² = 2E/m
v² = 2Ve/m
v = eBr/m (velocity of particle under action of magnetic force along circular path)
v² = Force/Area.Density
v = w underroot x°² - x²
v = underroot k/m × underroot x°² - x²
v = x°w (at mean position where x=0)
v = x° underoot k/m
v = v° underroot 1 - x²/x°² (for determining ratio b/w inst. Velocity and maxi. Velocity)
v= x°2pif = x°2pi/T
a = x°w² = x°w.w = vw = v.2pif
Common velocity = m1v1/m1+m2
vi² = Rg/Sin2theta
v = underoot Tension×length/mass
V = 2pi ke²/nh (speed of e- in nth orbit)
Vn = V/n
v = nh/2pimr (lambda = 2pir and lambda=h/p)
ma = kx
a = kx/m (SHM)
a = - gx/l (Simple pendulum)
ac = v²/r Open / Comment

2021-05-26 17:56:33 QUICK REVISION
FORMULAS

1. Formulas related to force:
F = ma
F = kx
F = m(vf² - vi²/2S)
F = mv/t
F = md/t²
F = m(vf - vi)/t
F = Area × density × velocity²
F = 1/2 mv²/d
F = 1/2 Pv/d
F = Power/velocity
Fc = mv²/r
Fc = mrw²
Fc/2 = mv²/2r
Fc = 2K.E/r
F = Area × Stress
F = pir² × stress
F = YA × Strain
F = YAl/L
F = pressure × area
F = change in momentum × time interval
F = - 2mVx × Vx/2l
F2 = F1/A1 × A2
F = qE
F = kQ/r²
F = ILB sintheta
F = q (v × B)
F = qE + q(v × B)


╔═════════════════════╗
▒☞@PHYSICS_WALLAH_OFFCIAL
╚═════════════════════╝ Open / Comment

2021-05-26 11:15:35 Kingdom Monera

• Bacteria are the sole members of the Kingdom Monera.

• They are the most abundant micro-organisms.

• Rigid cell wall of murein or peptidoglycan which
is itself made of N-acetyl glucosamine and N-acetyl
muramic acid.

• Histones are absent. Ribosomes are of 70S type. 'S' is
the sedimentation coefficient.

• Bacteria occur almost everywhere. Hundreds of bacteria
are present in a handful of soil. So, they are termed as
cosmopolitan.

• Many of them live in or on other organisms as parasites.

• They are very simple in structure but are very complex
in behavior. They show the most extensive metabolic
diversity Open / Comment

2021-05-25 14:50:03 Important SCIENCE (CHEMISTRY )

. Gases used in welding are ?
– Acetylene & Oxygen

Gases used by sea divers for breathing are ?
– Oxygen & Helium

. Best sources for Vitamin D are?
– Sunlight & Fish liver

Zinc Phosphide is used as?
– Rat Poison

. Fuse wire is made up of
– Lead and Tin

Purest form of Iron is?
– Wrought Iron

Radium is extracted from .
– Pitchblende

Which agent is as ‘seed’ in artificial rain?
– Silver Iodide

. Oxides of metals are .
– Alkaline

During the process of ‘rusting’ , the weight of iron .
–Increases

(metal) is liquid at room temperature.
– Mercury

What is the formula of common salt
– NaCl

. What is the maximum number of electrons that a p-orbital can hold
– 6

. What is used in fire extinguisher
– Sodium bicarbonate

What is the nature of metal oxides
– Basic

. Which gas burns with popping sound
– Hydrogen

Which metal is used for galvanization
– Zinc

. What is the nature of bleaching powder
– Oxidising agent

Which is stored in Kerosene
– Sodium

Phenolphthalein gives which color in acidic medium
– Colorless

Which gas is used in cigarette lighters?
– Butane

. Biogas chiefly contains .
– Methane

. Chemical used as fixer in Photography is .
– Sodium thiosulphate

Aspirin is
– Acetyl Salicylic Acid

is also known as ‘Stranger Gas.’
– Xenon

Natural rubber is a polymer derived from .
– Isoprene Open / Comment

2021-05-24 09:27:50 Physics Formulae

FOR MORE JOIN
╔════════════════╗
▒☞@books_wallah_official
╚════════════════╝
╔════════════════╗
▒☞@physics_wallah_test_series
╚════════════════╝ Open / Comment

2021-05-20 09:37:06 Transportation in Plants

The plants have low energy needs, as they use relatively slow transport systems.
Plant transport systems move energy from leaves and raw materials from roots to all their parts.
The xylem (tissue) moves water and minerals obtained from the soil to all other parts of the plants.
The phloem (tissue) transports products of photosynthesis from the leaves (where they are synthesized) to other parts of the plant.


Movement of Water in Plants
Water moves into the root from the soil and then steady it moves into the root xylem, creating a column of water, which is progressively pushed upwards.
Evaporation of water molecules from the cells of a leaf (see the image given above) creates a suction process, which pulls water from the xylem cells of roots; this process keeps going on.
The loss of water in the form of vapor from the leaves (i.e. aerial parts) of the plant is known as transpiration.
Transpiration, likewise, helps in the absorption and upward movement of water and minerals dissolved in it from roots to the leaves.
Transpiration also helps in the temperature regulation (in plants).
The transport of soluble products of photosynthesis is known as translocation, which occurs in the part of the vascular tissue known as phloem.
Along with photosynthesis products, the phloem also transports amino acids and other substances, which are ultimately delivered to roots, fruits, seeds, and to growing organs.

@PHYSICS_WALLAH_TEST_SERIES Open / Comment