Chemical control and coordination NCERT pdf in English

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Chemical control and coordination NCERT pdf in English:- Today we are sharing Chemical control and coordination NCERT pdf in English. This Chemical control and coordination NCERT pdf in English for upcoming examination like NEET, JEE, NTPC, SSC CGL, LIC, REET, UPPSC, MPTET, DSSSB, RPSC, UPSC, DRDO, DDA, AAI, SSC GD, ALL STATE PCS EXAM. This Chemical control and coordination NCERT pdf in English and important questions Chemical control and coordination NCERT pdf in English which Will be helpful for you in preparing for the exams. Keep watching the updates on this website every day, here the notes and questions are updated daily, if you need notes/questions on any subject or topic, then you can contact our team. pdfdownload.in The team is looking forward to supporting you.

Chemical control and coordination NCERT pdf in English for all competitive exams like UPSC, Railway and All Competitive Exams is important in all GOVT. Exams. Common questions are placed in Chemical control and coordination NCERT pdf in English, UPSC, Railway and All Competitive Exams, which has been put together in most examinations, can download, which has been put together in most examinations, you can download this PDF Notes very simply by clicking on the Download Button at the bottom. This Chemical control and coordination NCERT pdf in English All in One Questions and Answers in Hindi PDF Download post is dedicated to downloading our pdfdownload.in for free PDFs, which are the latest exam pattern based for NEET, JEE, JEE ADVANCE, UPSC, SSC, And All One-day Govt. exams, etc.

Biology is a critical skill that inculcates logical reasoning and out-of-the-box analytical abilities. Studying Biology will enable you to get much better at abstract reasoning. By going through the NCERT Book Class 11 Biology Chapter 22: Chemical coordination and integration and working your way through every question, you will be basically setting yourself up for success in Class 11 board exams, at least where is involved. Every exam you will get at least 20-25 questions from Chemical control and coordination NCERT pdf in English. So candidates must focus on the Chemical control and coordination NCERT pdf in English and answers in Hindi pdf 2022 For NEET, JEE, JEE ADVANCE, SSC Bank and download this GK Book to get important questions with the best solutions. We have put all Previous Year Questions of GK that are Asked in various Govt & Private Exam.

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Most Important Chemical control and coordination Question

Q 1 . Briefly mention the mechanism of action of FSH.

Ans. (Folliclestimulatinghormone)being glycoprotein is insoluble in lipids, therefore,
cannot enter the target cells. It binds to the specific receptor molecules located on the surface of the cell membrane to form hormone – receptor complex. This complex causes the release of an enzyme adenylate cyclase from the receptor site. This enzyme forms the cell cyclic adenosine monophosphate (cAMP) from ATP. The cAMP activates the existing enzyme system of the cell. This accelerates the metabolic reactions in the cell. The hormone is called the first messenger and the cAMP is termed the second messenger. The hormone- receptor complex changes the permeability of the cell membrane to facilitate the passage of materials through it. This increases the activities of the cell as it receives the desired materials.

Q.2. A milkman’s cow refuses to give milk. On being fondled by the calf, the cow produced enough milk. Explain the significance of the endocrine gland and the pathway related to this response.

Ans. A neuroendocrine reflex is created when calf suckling occurs that causes an increase in the oxytocin from the neurohypophysis. In the hypothalamus, oxytocin is synthesized in specific nuclei, the paraventricular nucleus, and the supraoptic nucleus. Here the neurons produce the oxytocin precursor and bundle it into vesicles. The level of oxytocin in the blood gets concentrated within a minute or two after the stimulation which causes smooth muscle contraction of the udder causing milk to flow. An intra-udder hormone that functions like oxytocin would do a similar function. Following is a summarization. Suckling stimulus → Hypothalamus → Neurohypophysis → Oxytocin → Udder → Flow of milk.

Q.3. A urine sample contained increased content of glucose and ketone bodies. Answer the questions below basis this observation.
a) Name the hormone and gland associated with this condition.
b) On which cells do these hormones act?
c) Name the condition. How can it be rectified?
Ans. a) Insulin hormone and Insulin gland. b) It acts on the β-cells of islets of Langerhans present in the pancreas c) Prolonged hyperglycemia causes diabetes mellitus that is linked to loss of glucose via urine and accumulation of harmful compounds called as ketone bodies. Insulin therapy can be successfully used to treat Diabetic patients.

Q.4. Describe the importance of hormones and endocrine glands responsible for regulating the Calcium Homeostasis.

Ans. The hormones and endocrine glands that regulate calcium homeostasis are thyroid and parathyroid glands and their related hormones which are Parathyroid hormone (PTH) and calcitonin. The endoderm of the embryo develops the parathyroid glands and has two types of cells – oxyphil cells and chief cells. The chief cells secrete the parathyroid hormone(PTH) which is involved in controlling phosphate and calcium stability between other tissues and blood. From bones, it causes the secretion of calcium into the blood. PTH causes an increase in the reabsorption of calcium by the organs of the body such as kidneys and intestine. The thyroid gland is the largest endocrine gland that is situated prefrontal to the thyroid cartilage of the larynx in the neck. It regulates the calcium homeostasis and releases thyrocalcitonin hormone which is produced by the ‘C’ cells. The hormone is secreted when the calcium concentration in blood is high. They lower the calcium level by suppressing the release of calcium ions from the bones. Hence calcitonin has a contrary effect on calcium in comparison to the parathyroid hormone.

Q.5. Explain why hypothalamus is a super master endocrine gland.

Ans. The hypothalamus controls an array of functions. It has many groups of neurosecretory cells known as nuclei that produce hormones. These hormones maintain the secretion and synthesis of pituitary hormones. The hormones produced by the hypothalamus are – the releasing hormones and the inhibiting hormones. The releasing hormones trigger the secretion of pituitary hormones and the inhibiting hormones hinder the secretions of the pituitary hormones. Through a portal circulatory system, the hormones arrive at the pituitary gland and check the functions of the anterior pituitary. Hypothalamus directly regulates the posterior pituitary. It also synthesizes two hormones – vasopressin and oxytocin which are further conveyed to the posterior pituitary.

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Most Important Chemical control and coordination Question

Q.1. State the significance of luteinizing hormones in males and females.

Ans. The luteinizing hormone in males triggers the production and secretion of hormones known as androgens from testes. Along with Follicle Stimulating Hormone (FSH), androgens control the spermatogenesis. The LH in females causes ovulation of the Graafian follicles and maintains the corpus luteum, developed from the traces of the Graafian follicles after ovulation that produces progesterone.

Q.2. Write about the importance of the second messenger in hormone action.

Ans. The hormones that do not enter the target cells, communicate with specific receptors situated on the surfaces of the target cell membranes and produces second messengers on the plasma membrane(inner side). In turn, the second messenger performs all the functions related to hormones.

Q.3. Which is the steroid that controls inflammatory responses? Name its source and its other functions.

Ans. Glucocorticoids. They are secreted by the adrenal cortex. They trigger gluconeogenesis, proteolysis, and lipolysis and hinder the cellular uptake and utilization of amino acids.

Q.4. Why do old people have a weak immunity system?

Ans. The thymus gland is situated on the dorsal side of the heart and the aorta and is a lobular structure. Derived from the embryo’s endoderm, the thymus produces the thymosin hormone that triggers the development of WBCs which produce immunity. In older individuals, the thymus degenerates thus causing a decreased thymosin secretion. Hence their immune system becomes weak.

Q.5. How does hypothyroidism affect the maturation and development of a growing baby, generally seen during pregnancy?

Ans. During pregnancy, hypothyroidism causes defective maturation and development of the fetus, that induces a stunted growth, low Intelligence Quotient(IQ), mental retardation, deaf-mutism, abnormal skin, etc.

Q.6. Differentiate between hyperthyroidism and hypothyroidism.

Ans. Hyperthyroidism is the over secretion of thyroid hormone and occurs due to the cancer of the thyroid gland whereas hypothyroidism is the low secretion of the thyroxine hormone.

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