The main function of endocrine glands is to secrete hormones directly into the bloodstream. Hormones are chemical substances that affect the activity of another part of the body (target site). In essence, hormones serve as messengers, controlling and coordinating activities throughout the body. 

Upon reaching a target site, a hormone binds to a receptor, much like a key fits into a lock. Once the hormone locks into its receptor, it transmits a message that causes the target site to take a specific action. Hormone receptors may be within the nucleus or on the surface of the cell.
Ultimately, hormones control the function of entire organs, affecting such diverse processes as growth and development, reproduction, and sexual characteristics. Hormones also influence the way the body uses and stores energy and control the volume of fluid and the levels of salts and sugar (glucose) in the blood. Very small amounts of hormones can trigger very large responses in the body.

Although hormones circulate throughout the body, each type of hormone influences only certain organs and tissues. Some hormones affect only one or two organs, whereas others have influence throughout the body. For example, thyroid-stimulating hormone, produced in the pituitary gland, affects only the thyroid gland. In contrast, thyroid hormone, produced in the thyroid gland, affects cells throughout the body and is involved in such important functions as regulating growth of cells, controlling the heart rate, and affecting the speed at which calories are burned. Insulin, secreted by the islet cells of the pancreas, affects the processing (metabolism) of glucose, protein, and fat throughout the body.

Most hormones are derived from proteins. Others are steroids, which are fatty substances derived from cholesterol.
To control endocrine functions, the secretion of each hormone must be regulated within precise limits. The body is normally able to sense whether more or less of a given hormone is needed.

Many endocrine glands are controlled by the interplay of hormonal signals between the hypothalamus, located in the brain, and the pituitary gland, which sits at the base of the brain. This interplay is referred to as the hypothalamic-pituitary axis. The hypothalamus secretes several hormones that control the pituitary gland.

The pituitary gland, sometimes called the master gland, in turn controls the functions of many other endocrine glands. The pituitary controls the rate at which it secretes hormones through a feedback loop in which the blood levels of other endocrine hormones signal the pituitary to slow down or speed up. So, for example, the pituitary gland senses when blood levels of thyroid hormone are low and releases thyroid stimulating hormone, which tells the thyroid gland to make more hormones. If the level gets too high, the pituitary senses that and decreases the amount of thyroid stimulating hormone, which then decreases the amount of thyroid hormone produced. This back-and-forth adjustment (feedback) keeps hormone levels in proper balance.

Many other factors can control endocrine function. For example, a baby sucking on its mother's nipple stimulates her pituitary gland to secrete prolactin and oxytocin, hormones that stimulate breast milk production and flow. Rising blood sugar levels stimulate the islet cells of the pancreas to produce insulin. Part of the nervous system stimulates the adrenal gland to produce epinephrine.

The main function of endocrine glands is to secrete hormones directly into the bloodstream. Hormones are chemical substances that affect the activity of another part of the body (target site). In essence, hormones serve as messengers, controlling and coordinating activities throughout the body. Hormones are molecules produced by the endocrine system that send messages to various parts of the body. They help regulate your body's processes, like hunger, blood pressure, and sexual desire. While hormones are essential to reproduction, they are fundamental to all the systems of your body.

• In Britain, the formation of the nation state was not the result of a sudden revolution. It was the result of a long process.

• There was no British nation prior to the eighteenth century.
• British Isles were ethnic ones. Ethnic groups had their own cultural and political traditions
• The English nation steadily grew in wealth, importance and power. It became able to extend its influence over the other nations of the islands.
• The English Parliament had seized power from the monarchy in 1688.
• The Act of Union, 1707 between England and Scotland resulted in the formation of the United Kingdom of Great Britain. With the result, England became able to impose its influence on Scotland.

• IN Britain, the formation of the nation state was not the result of a sudden revolution. It was the result of a long process.
• There was no British nation prior to the eighteenth century.
• British Isles were ethnic ones. Ethnic groups had their own cultural and political traditions
• The English nation steadily grew in wealth, importance and power. It became able to extend its influence over the other nations of the islands.
• The English Parliament had seized power from the monarchy in 1688.
• The Act of Union, 1707 between England and Scotland resulted in the formation of the United Kingdom of Great Britain. With the result, England became able to impose its influence on Scotland.

A letter to the editor (sometimes abbreviated LTTE or LTE) is a letter sent to a publication about issues of concern from its readers. Usually, letters are intended for publication. 

How to write a letter to the editor

1. Respond to an article in the paper. 
2. Follow the paper's directions. 
3. Share your expertise. 
4. Refer to the legislator or corporation you are trying to influence by name. 
5. Write the letter in your own words. 
6. Refute, advocate, and make a call to action. 
7. Include your contact information.

Realized there is one subject every student learns, regardless of his or her major: stress. It can be helpful — stress is a natural way our brain communicates with the body to restore balance. Other times, stress can be so overwhelming it gets classified with a clinical name. Mental health issues in college students are on the rise, with anxiety and depression being the most common.

With technological advancements, we are the most connected, fast-paced and busy generation yet. Society is more disconnected from individual interaction than ever before. Financial stressors are among the biggest worries college students share. The combination of business, lack of person-to-person interaction and financial worry is a perfect storm for misdiagnosed cases of anxiety and depression. It is easy to “brush off” these problems as everyday stressors, but it is vital to know the difference between everyday stress and mental health issues.

Any student who has made his or her way through a full semester has experienced what an exam week feels like. This is a period of worry, restlessness, dietary changes and varied sleep patterns. Physical symptoms include muscle tension, fatigue, difficulty sleeping, irritability, chest pain and headaches. Students need to realize that these negative things are normal, but should be temporary. If these things are part of a Buckeye’s daily routine, he or she should seek help. Help can be found through Ohio State’s very own Psychological Services Center.
 

In the poem "The Dust of Snow" Robert Frost talks about the importance of small things in our lives. These small things can change the attitude of the people at a large level. In the poem, the poet writes about a crow who shakes off the snow dust. The poet wants the readers to learn from the crow and shake off all the miseries and sadness in the same way. Such small imagery which are present around us have a lot to teach us. These images can change the mood of the people as they did to the poet in the poem.

The first flight of the young seagull.

• The young seagull was hungry and thus he dived at the fish. After holding her he fell downwards and outwards into the area.
• The young seagull thought he would die but suddenly his wings spread outwards automatically.
• He moved outwards and downwards but landed safely on the sea and now he floated on the water without any fear.

• The young seagull was hungry and thus he dived at the fish. After holding her he fell downwards and outwards into the area.
• The young seagull thought he would die but suddenly his wings spread outwards automatically.
• He moved outwards and downwards but landed safely on the sea and now he floated on the water without any fear.

(a) The iris is the part of the eye that controls the amount of light entering the eye.

(b) The retina is the part of the eye on which images are formed.

(c) The ciliary muscles change the focal length of the eye lens.

Light passes through the front of the eye (cornea) to the lens. The cornea and the lens help to focus the light rays onto the back of the eye (retina). The cells in the retina absorb and convert the light to electrochemical impulses which are transferred along the optic nerve and then to the brain.

Two national anthems were sung on the day of the inauguration, one by the whites and another by the blacks. This symbolized blacks and whites becoming equal. The two National anthems where sung on the every inauguration is to show the equality in all the black and the white people. These songs say that all the people in this world are equal. It tells us that we should not fight for any reason and all the people should be equal.

(1) Clarify Ideas before Communication:

The person sending the communication should be very clear in his mind about what he wants to say. He should know the objective of his message and, therefore, he should arrange his thoughts in a proper order.

(2) Communicate According to the Need of the Receiver:

The sender of the communication should prepare the structure of the message not according to his own level or ability but he should keep in mind the level, understanding or the environment of the receiver.

(3) Consult Others before Communication:

At the time of planning the communication, suggestions should be invited from all the persons concerned. Its main advantage will be that all those people who are consulted at the time of preparing the communication plan will contribute to the success of the communication system.

(4) Be Aware of Language, Tone and Content of Message:

The sender should take care of the fact that the message should be framed in clear and beautiful language. The tone of the message should not injure the feelings of the receiver. As far as possible the contents of the message should be brief and excessive use of technical words should be avoided.

A natural product is a chemical compound or substance produced by a living organism—that is, found in nature. In the broadest sense, natural products include any substance produced by life. The broadest definition of natural product is anything that is produced by life, and includes the likes of biotic materials (e.g. wood, silk), bio-based materials (e.g. bioplastics, cornstarch), bodily fluids (e.g. milk, plant exudates), and other natural materials (e.g. soil, coal).

(c) 16 cm

Let ABCD be the rhombus with diagonals AC and BD intersecting each other at O. 

Also, diagonals of a rhombus bisect each other at right angles.

If AC = 12 cm, AO = 6 cm 

Applying Pythagoras theorem in right-angled triangle AOB. We get:

Hence, the length of the second diagonal BD is 16 cm.

• Genetic variation is an important force in evolution as it allows natural selection to increase or decrease frequency of alleles already in the population.
• Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism’s offspring).
• Genetic variation is advantageous to a population because it enables some individuals to adapt to the environment while maintaining the survival of the population.

we have to find sum and product of zeroes of the given polynomial 3x² - 5x + 6.

we know, for general form of quadratic polynomial, ax² + bx + c

• sum of zeroes = - coefficient of x/coefficient of x² = -b/a
• sum of zeroes = - coefficient of x/coefficient of x² = -b/a product of zeroes = constant/coefficient of x² = c/a

on comparing 3x² - 5x + 6 with ax² + bx + c we get, a = 3, b = -5 and c = 6

so, sum of zeroes = -b/a = -(-5)/3 = 5/3

product of zeroes = c/a = (6)/3 = 2

hence, sum of zeroes = 5/3

and product of zeroes = 2