“12th Class Biology Chapter 15 Quiz: Homeostasis” deals with the most essential biological process of maintenance of internal stability in an organism. Homeostasis is indispensable for proper functioning of cells and survival as it tends to keep various physiological parameters like temperature, pH, and electrolyte balance within the narrow range. This chapter describes the mechanisms of homeostasis, its significance in various systems, and how the body responds to changes in the environment. Polish your concepts with our MDCAT Quiz and free flashcards to excel in this topic.
Mechanisms of Homeostasis
Homeostasis involves a series of complicated processes that control the internal environment of an organism. It is dependent on feedback mechanisms to establish stability. The primary feedback mechanisms include negative feedback, where changes are opposed to return to a set point, and positive feedback, where changes are amplified to complete a specific process.
Homeostasis in Different Systems
Various organ systems contribute to the maintenance of homeostasis. The nervous system is important in detecting changes in both the internal and external environment and in sending signals to the appropriate effectors to restore balance. The endocrine system helps regulate long-term homeostasis through the release of hormones that affect, for example, metabolism, growth, and water balance.
MDCAT Quiz: Homeostasis
Test your knowledge with our MDCAT Quiz on homeostasis. The quiz covers major topics including the regulation of body temperature, blood sugar levels, and the functions of different organs and systems in maintaining homeostasis. It’s designed to help you prepare for related questions in your MDCAT exams and strengthen your understanding of this essential concept.
- Test Name: 12th Class Biology Chapter 15 Quiz
- Type: Quiz Test
- Total Questions: 30
- Total Marks: 30
- Time: 30 minutes
Note: Answer of the questions will change randomly each time you start the test, once you are finished, click the View Results button.
Get Your Username and Password for MDCAT Tests
Sign Up Now
Free Flashcards for Homeostasis
Use free flashcards to review key concepts related to homeostasis. These flashcards provide quick insights into feedback mechanisms, the role of hormones, and how different systems contribute to internal stability. They are useful for revising key concepts and ensuring solid retention of the material.
Which hormone is responsible for regulating calcium and phosphate levels in the blood and bones?
Calcitonin
What is the role of atrial natriuretic peptide (ANP) in the body?
Promoting sodium excretion
Which part of the brain controls hormone secretion by the pituitary gland?
Hypothalamus
What is the primary function of cortisol in the body?
Regulating stress response
Which gland is responsible for producing growth hormone, which stimulates growth and development?
Pituitary gland
What is the role of erythropoietin in the body?
Stimulating red blood cell production
Which hormone is responsible for promoting sodium reabsorption and potassium excretion in the kidneys?
Aldosterone
What is the primary function of the urinary system in homeostasis?
Removing waste products
Which part of the brain regulates hunger and satiety signals?
Hypothalamus
What is the role of leptin in the body?
Suppressing appetite
Which hormone is responsible for stimulating hunger and regulating appetite?
Ghrelin
What is the primary function of the cardiovascular system in homeostasis?
Transporting nutrients and oxygen
Which gland is responsible for producing melatonin, a hormone involved in regulating sleep-wake cycles?
Pineal gland
What is the role of thyroid hormone in the body?
Regulating metabolism
Which hormone regulates water reabsorption in the kidneys, thus controlling blood volume and pressure?
Antidiuretic hormone
What is the primary function of the digestive system in homeostasis?
Nutrient absorption
Which part of the brain regulates body temperature by initiating sweating or shivering responses?
Hypothalamus
What is the role of parathyroid hormone (PTH) in the body?
Increasing blood calcium levels
Which hormone is responsible for promoting glucose uptake by cells, thus lowering blood glucose levels?
Insulin
What is the primary function of the integumentary system in homeostasis?
Regulating body temperature
Which gland is responsible for producing adrenaline, a hormone involved in the fight or flight response?
Adrenal gland
What is the role of antidiuretic hormone (ADH) in the body?
Regulating water reabsorption in the kidneys
Which hormone regulates blood calcium levels by promoting calcium deposition in bones?
Calcitonin
What is the primary function of the endocrine system in homeostasis?
Regulating hormone levels
Which part of the brain controls thirst and regulates water balance in the body?
Hypothalamus
What is the role of glucagon in the body?
Increasing blood glucose levels
Which hormone regulates blood pressure by increasing sodium reabsorption and potassium excretion in the kidneys?
Aldosterone
What is the primary role of the respiratory system in homeostasis?
Regulating oxygen and carbon dioxide levels
Which hormone is released by the kidneys to stimulate red blood cell production in response to low oxygen levels?
Erythropoietin
What is the primary function of insulin in the body?
Lowering blood glucose levels
Experience the real exam environment with our expertly designed collection of over 25,000 MCQs MDCAT Mock Tests.
