Role of hormones in coordination - class-X

Endocrine system, like the nervous system, is meant for internal communication and regulation of the animal body. These two systems operate in a coordinated way on many occasions. Many important functions of the endocrine system are infact, under the control of nervous system. Therefore, the two systems are often collectively called as neuroendocrine system

Cortisone secreted by the Peripheral Cortex of the Adrenal Gland helps body during extreme condition such as high or low temperature. It also helps in burns and several infections.

Hormones are defined as non-nutrient chemicals produced in trace amounts that act as intercellular messengers. Option B is wrong because the hypothalamus produces releasing/inhibitory hormones, not the pituitary. Option C is wrong because the adenohypophysis is under hormonal, not direct neural, control. Option D is wrong because many organs like the heart and kidney produce hormones.

Hyperthyroidism (overactive thyroid) occurs when your thyroid gland produces too much of the hormone thyroxine. Hyperthyroidism can accelerate your body's metabolism, causing unintentional weight loss and a rapid or irregular heartbeat.

The production of adrenaline occurs in the adrenal glands, which sit above the kidneys. Adrenaline is responsible for the fight-or-flight reaction to a threat, and it triggers specific processes in the body. For example, it might make the body send extra oxygen to the lungs to aid a person to run away.

With too little insulin, the body can no longer move glucose from the blood into the cells, causing high blood glucose levels. If the glucose level is high enough, excess glucose spills into the urine. This makes the body tired and can cause weight loss.

Hormones secreted by the endocrine system have to be carried throughout to body by the circulating blood to act where ever required.

The endocrine system do not regulate gene expression nor controls the release of dominant genes. It is also not responsible for communication between sensory system but is responsible for releasing, monitoring and regulating hormones.

Steroids, though actually enter the cell and interact with steroid receptor proteins to control gene expression. In steroid receptor proteins, the N-terminal region of the protein is required to activate transcription. Negative and positive autoregulatory feedback loops serve to limit or augment hormonal responses, respectively. Autoregulation of the mRNAs encode oestrogen, progesterone, androgen, and glucocorticoid receptors by the steroid hormones in reproductive tissues. These post-transcriptional mRNA effects cause steroid hormones to impact the expression of a large population of genes. 

Epinephrine is the hormone released in response to stress conditions. The rise in the hormone level in he blood causes an increase in ATP production for which the rates of glycolysis increases in the muscles (heart and skeletal muscles). The synthesis of glucose by gluconeogenesis takes place in the liver and so, the rate of glycolysis is low. 

Epinephrine acts on nearly all body tissues and its actions vary by tissue type and tissue expression of adrenergic receptors. The  β adrenergic receptor binding helps in increasing the secretion of adrenocorticotropic hormone by the pituitary glands.

The body has a mechanism to maintain a normal state. Whenever there is change in thus state there are messages through the body systems to increase if there is a fall below the normal , or decrease if there is rise above the normal. This kind of ordering for the opposite. Is negative feedback to restore the normal state.

'Too much, slow down or too little, speed up' -this is the feedback mechanism. the body has a mechanism to maintain a normal state. Whenever there is a change in this state there are messages through the body systems to increase if there is a fall below the normal, or decrease if there is rise above the normal.  This kind of ordering for the opposite Is negative feedback to restore the normal state. examples of positive feedback mechanisms are very few. One example is that of uterine contractions during childbirth. The normal state of the uterus is uncontracted, one contraction instead of commanding to come to normal gives a message to continue further (positive feedback till the delivery is completed).

Examples of positive feed back mechanisms are very few. One example is that of uterine contractions during child birth. Normal state of uterus is un contacted, one contraction instead of commanding to come to normal gives a message to continue further (positive feedback till the delivery is completed).

'Too much, slow down or too little, speed up' -this is the feedback mechanism. the body has a mechanism to maintain a normal state. Whenever there is a change in this state there are messages through the body systems to increase if there is a fall below the normal, or decrease, if there is a rise above the normal. This kind of ordering for the opposite Is negative feedback to restore the normal state.

'Too much, slow down or too little, speed up' -this is the feedback mechanism. the body has a mechanism to maintain a normal state. Whenever there is a change in this state there are messages through the body systems to increase if there is a fall below the normal, or decrease if there is rise above the normal.  This kind of ordering for the opposite Is negative feedback to restore the normal state. examples of positive feedback mechanisms are very few. One example is that of uterine contractions during childbirth. The normal state of the uterus is uncontracted, one contraction instead of commanding to come to normal gives a message to continue further (positive feedback till the delivery is completed).