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Test: Chemical Coordination In Animals - Class 10 MCQ


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15 Questions MCQ Test Science Class 10 - Test: Chemical Coordination In Animals

Test: Chemical Coordination In Animals for Class 10 2024 is part of Science Class 10 preparation. The Test: Chemical Coordination In Animals questions and answers have been prepared according to the Class 10 exam syllabus.The Test: Chemical Coordination In Animals MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Chemical Coordination In Animals below.
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Test: Chemical Coordination In Animals - Question 1
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What is the function of testosterone in the male body?

Detailed Solution for Test: Chemical Coordination In Animals - Question 1
Testosterone is the primary male sex hormone produced by the testes. It plays a crucial role in developing and maintaining male characteristics such as facial hair growth, deepening of the voice, muscle mass development, and sperm production. Additionally, testosterone is essential for regulating libido and overall reproductive health in men.
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What is the primary function of the pituitary gland?

Detailed Solution for Test: Chemical Coordination In Animals - Question 2
The pituitary gland, often referred to as the "master gland," is responsible for regulating various hormones in the body. One of its key functions is controlling body growth and development by releasing hormones like growth hormone. Imbalances in this gland can lead to conditions such as dwarfism or gigantism.
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Test: Chemical Coordination In Animals - Question 3
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Which hormone is primarily responsible for regulating blood sugar levels in the body?

Detailed Solution for Test: Chemical Coordination In Animals - Question 3
Insulin is a hormone produced by the pancreas that plays a vital role in regulating blood sugar levels. It helps cells in the body absorb glucose from the bloodstream, thereby lowering blood sugar levels. Imbalances in insulin production or function can lead to conditions like diabetes mellitus.
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Where is the Pineal Gland located in the brain?
Detailed Solution for Test: Chemical Coordination In Animals - Question 4
The Pineal Gland is located towards the center of the brain, dorsal to the diencephalon. This small endocrine gland is known for secreting the hormone melatonin, which plays a crucial role in regulating sleep patterns, reproductive development, and seasonal functions.
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What hormone is produced by the Thymus Gland?
Detailed Solution for Test: Chemical Coordination In Animals - Question 5
The Thymus Gland produces the hormone Thymosin. This hormone plays a vital role in the maturation of T-lymphocytes, which are crucial for the proper functioning of the immune system. The Thymus Gland, located in the upper region of the sternum in front of the heart, is essential for immune system development.
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Which gland is responsible for controlling calcium and phosphate ion levels in bones and blood?
Detailed Solution for Test: Chemical Coordination In Animals - Question 6
The Parathyroid Glands, located as two pairs on the dorsal surface of the thyroid gland in the neck, are responsible for producing parathormone. Parathormone plays a critical role in regulating calcium and phosphate ion levels in both bones and blood. Disorders related to the Parathyroid Glands can lead to conditions like tetany (hyposecretion) and osteoporosis (hypersecretion).
Test: Chemical Coordination In Animals - Question 7
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What is the primary function of the Hypothalamus in the endocrine system?
Detailed Solution for Test: Chemical Coordination In Animals - Question 7
The Hypothalamus, a neuro-endocrine region, plays a crucial role in linking the nervous and endocrine systems. It is responsible for producing hormones like somatostatin and dopamine and is connected to the pituitary gland. The Hypothalamus helps regulate various bodily functions and plays a key role in maintaining homeostasis by controlling hormone release and other essential processes.
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What distinguishes hormones in terms of their secretion compared to other substances in the body?
Detailed Solution for Test: Chemical Coordination In Animals - Question 8
Hormones are secreted only when required, in response to specific signals or stimuli in the body. This ensures that hormone levels are carefully regulated and maintained within the body. Unlike some substances that are produced continuously, hormones are released in precise amounts at specific times to fulfill their regulatory functions. This controlled secretion is essential for maintaining the body's overall balance and health.
Test: Chemical Coordination In Animals - Question 9
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Which hormone is known as the "fight or flight" hormone, preparing the body for physical stress in emergency situations?
Detailed Solution for Test: Chemical Coordination In Animals - Question 9
Adrenaline, also known as the "fight or flight" hormone, is secreted by the adrenal medulla and plays a crucial role in preparing the body for physical stress during emergency situations. This hormone helps in increasing heart rate, dilating air passages, and mobilizing glucose to provide energy to the muscles, enabling a quick response to perceived threats.
Test: Chemical Coordination In Animals - Question 10
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Which gland is responsible for controlling glucose, protein, and fat metabolism in the body?
Detailed Solution for Test: Chemical Coordination In Animals - Question 10
The Thyroid Gland, located in the neck region, is responsible for secreting hormones like Triiodothyronine and Thyroxine. Thyroxine plays a key role in regulating the body's metabolism of glucose, proteins, and fats. Any imbalance in thyroid hormone levels can lead to metabolic issues affecting various bodily functions.
Test: Chemical Coordination In Animals - Question 11
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What is a distinctive characteristic of most hormone molecules in terms of their size?
Detailed Solution for Test: Chemical Coordination In Animals - Question 11
Most hormone molecules are small in size, with low molecular weight. This characteristic allows hormones to travel easily through the bloodstream to reach their target organs and tissues. The small size of hormone molecules also facilitates their rapid and efficient communication with cells throughout the body, enabling precise regulation of various physiological processes.
Test: Chemical Coordination In Animals - Question 12
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Which of the following statements accurately describes the regulation of hormone secretion?
Detailed Solution for Test: Chemical Coordination In Animals - Question 12
Hormone secretion is regulated by feedback mechanisms, which ensure that hormone levels are maintained within a narrow range to support proper physiological functions. Feedback loops involving various glands and organs monitor hormone levels in the body and adjust secretion rates accordingly. This precise regulation is crucial for maintaining overall health and ensuring that bodily processes function optimally.
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What nutrient is essential for the production of thyroxine hormone by the thyroid gland?
Detailed Solution for Test: Chemical Coordination In Animals - Question 13
Iodine is an essential mineral required for the production of thyroxine hormone by the thyroid gland. Thyroxine regulates the metabolism of carbohydrates, fats, and proteins in the body. A deficiency of iodine can lead to conditions like goiter, causing a swollen neck. Hence, consuming iodine-rich foods or iodized salt is crucial for maintaining proper thyroid function.
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Which part of the adrenal gland secretes cortisol, aldosterone, and androgens?
Detailed Solution for Test: Chemical Coordination In Animals - Question 14
The Adrenal Cortex, a part of the adrenal gland located above the kidneys, is responsible for secreting hormones like cortisol, aldosterone, and androgens. These hormones play vital roles in regulating various physiological processes such as stress response, electrolyte balance, and secondary sexual characteristics in both males and females.
Test: Chemical Coordination In Animals - Question 15
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Where are the female gonads located in the human body?
Detailed Solution for Test: Chemical Coordination In Animals - Question 15
Female gonads, known as ovaries, are located in the pelvic cavity of the female body. These organs are responsible for producing hormones like estrogen and progesterone, which play crucial roles in regulating the menstrual cycle, pregnancy, and other reproductive functions.
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