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Yogita Ingle 6 years, 7 months ago
Feedback mechanism is the mechanism of the body to maintain the levels of hormones in the body in the desired limits. An increase or decrease in the levels of the hormones triggers the feedback mechanism.
The body has two types of feedback mechanisms, positive and negative feedback mechanism.
Example:
Negative feedback mechanism:
Whenever there is a change in the normal state, the messages are sent to ‘increase’ secretions if there is a fall below normal or to ‘decrease’ secretions if there is a rise above normal to restore the normal body state. Such a mechanism is called a negative feedback mechanism.
The increase in the blood sugar level stimulates the secretion of insulin so that the sugar level is maintained. If the blood sugar level falls below normal, then it stimulates the secretion of glucagon. Glucagon stimulates the breakdown of glycogen to glucose, and thus, the normal sugar level is maintained.
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Yogita Ingle 6 years, 7 months ago
Molarity=(no of moles of solute)/(volume of solution in litrs)
while molality=(moles of solute)/(wt of solvent in kg)
the above two have a relationship as-
molality= Molarity/(density of solution-Molarity*molecular wt of solute)
m = M / (ρ - M x mw A)
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Yogita Ingle 6 years, 7 months ago
• Sometimes anxiety and tension are associated with obsessions—persistent unwanted thoughts, impulses or ideas or compulsions—seemingly irrational behaviours repeatedly carried out in a fixed, repetitive way.
• People with obsessive-compulsive disorders find their obsessions or compulsions distressing and debilitating but feel unable to stop them.
• The compulsive actions are usually carried on to alleviate the anxiety caused by obsessions. A person provoked with anxious thoughts may try to block them out by compulsively counting steps while walking. Another person obsessed with the idea that he is guilty or dirty, may wash his hands every few minutes, sometimes till the bleed.
• The symptoms of OCD include a contamination - an obsession of contamination followed by washing or compulsive avoidance of the object. Shame and disgust and the feeling of being easily contaminated are common. Patients usually believe that the contamination is spread from object to object or person to person by the slightest contact.
Posted by Pramisha Gewali 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
Let the number of mole of N2 dissolved in water be n
Henry’s law constant for N2 at 293 K is 76.48 kbar.
according ti henrys law
partial pressure exerted by N2=Kh*x
x is the mole fraction
mole fraction of N2=x/(x+55.5)
.987=76.48*10^3 *x/(x+55.5)
x=.7 milimole
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Sia ? 6 years, 7 months ago
Reproduction is the ability of an organism to produce the young ones of its own kind.
Sachin Kumar 6 years, 7 months ago
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भारत के पोवियत संघ के साथ सदैव ही अच्छे संबंध रहें हैं। इसका वर्णन हम इस प्रकार कर सकते हैं-
- सोवियत संघ ने भिलाई, बोकारो, विशाखापट्टनम के इस्पात कारखानों तथा भारत हेवी इलेक्ट्रिकल्स जैसे मशीनरी संयंत्रों के लिए आर्थिक व तकनीकी सहायता दी।
- भारत के पास जब विदेशी मुद्रा की कमी थी तब सोवियत संघ ने रुपये को माध्यम बनाकर भारत के साथ व्यापार किया।
- सोवियत संघ ने भारत की सार्वजनिक कंपनियों की हर प्रकार से मदद की।
- भारत के अंतरिक्ष उद्योग तथा परमाणुविक योजना में भी सोवियत संघ ने मदद की।
Posted by Lucky Soni 6 years, 7 months ago
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Sia ? 6 years, 7 months ago
Magnification of the microscope = 100
Average width of the hair in the field of view of the microscope = 3.5 mm
{tex}\therefore{/tex} Actual thickness of the hair is{tex}\frac { 3.5 } { 100 }{/tex} = 0.035 mm.
Posted by Vaibhav Laxmi 6 years, 7 months ago
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Chinmoyee Neog 6 years, 7 months ago
Sia ? 6 years, 7 months ago
Since the Cold War did not eliminate rivalries between the two alliances there were mutual suspicions between them. This led to an arms race. Huge stock of arms was considered necessary to prevent wars from taking place. Both USA and USSR wanted to prove their supremacy on the global stage. The two opposite bloc were sceptical to each other about their nuclear arsenals which led them to produce more and more nuclear weapons for their safeguard. On the other hand, both the sides understood that in spite of restraint, the war might occur due to the following reasons:
- Miscalculation of the number of weapons in the possession of the other camp.
- Misunderstanding the intentions of the other side.
- A nuclear accident by mistake or by a soldier mischievously to start a war.
Thus, both the powers - the US and the Soviet Union - decided to limit or eliminate certain kinds of nuclear and non-nuclear weapons to maintain a stable balance of weapons. Starting in the 1960s, three treaties were signed. These were the Limited Test Ban Treaty, the Nuclear Non-Proliferation Treaty, and the Anti-Ballistic Missile Treaty. Thereafter, the superpowers held several rounds of arms limitation talks and signed several more treaties to limit their arms.
Posted by Chandan Kumar 6 years, 7 months ago
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Miss Mor 6 years, 7 months ago
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