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With reference to thermoregulation in animals, consider the following statements: 1. In cold-blooded animals, the body temperature tends to match with the environmental temperature in which they live. 2. Human beings are cold-blooded species as they regulate their temperature according to the external environment. 3. Warm-blooded animals require more food and energy as compared to cold-blooded animals of the same weight. Select the correct answer using the code given below.

With reference to thermoregulation in animals, consider the following statements: 1. In cold-blooded animals, the body temperature tends to match with the environmental temperature in which they live. 2. Human beings are cold-blooded species as they regulate their temperature according to the external environment. 3. Warm-blooded animals require more food and energy as compared to cold-blooded animals of the same weight. Select the correct answer using the code given below. Correct Answer 1 and 3 only

The correct answer is 1 and 3 only.

Key Points

  • Warm-blooded creatures, like mammals and birds, try to keep the inside of their bodies at a constant temperature.
    • They do this by generating their own heat when they are in a cooler environment, and by cooling themselves when they are in a hotter environment.
    • To generate heat, warm-blooded animals convert the food that they eat into energy.
    • They have to eat a lot of food, compared with cold-blooded animals, to maintain a constant body temperature.
    • Hence statement 3 is correct.
  • Cold-blooded creatures take on the temperature of their surroundings.
    • They are hot when their environment is hot and cold when their environment is cold.
    • Thus they match the temperature of their environment.
    • Hence statement 1 is correct.
  • Humans are warm-blooded endotherms like other mammals and birds.
    • Cold-blooded animals such as amphibians and reptiles must constantly move in and out of sunlight, trying to maintain their body temperature.
    • Hence statement 2 is not correct.
  • ​Hence the option 2 is correct.

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  • Thermoregulation
    • Thermoregulation is the ability of an organism to maintain a core body temperature, which is 37°C (98°F) within an optimal physiological range.
    • The hypothalamus, a portion of the brain which plays an important role in regulating body temperature by acting as a thermostat.
    • Thermoregulation is also called heat regulation.
  • Ectothermic Animals
    • They are commonly called cold-blooded animals.
    • They gain most of their heat from external sources.
    • They produce a very less amount of heat to keep their body warm and have a low metabolic rate. Examples of ectothermic animals include amphibians, fish, lizards, other reptiles, etc.
  • Endothermic Animals
    • They are commonly called warm-blooded animals.
    • They develop most of the heat mainly from their body’s metabolisms and produce a required amount of heat to keep their body warm.
    • These animals have a very high metabolic rate.
    • Examples of Endothermic animals include all mammals and birds.
  • Mechanism of Thermoregulation
    • The hypothalamus is a small section or a portion of a human brain, which is mainly involved in the secretion or release of all hormones from their respective glands and controlling several body functions.
    • The mechanisms of thermoregulation are also controlled by this Hypothalamus.

    • When there is a small variation in the internal body temperature, the sensors in the central nervous system sends the message to the hypothalamus and in response, the hypothalamus sends signals to various cells, muscles, and other systems in our body.

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Related Questions

Read the following passage and answer the item that follows. Your answers to this item should be based on the passage only. Many farmers use synthetic pesticides to kill infesting insects. The consumption of pesticides in some of the developed countries is touching 3000 grams/hectare. Unfortunately, there are reports that these compounds possess inherent toxicities that endanger the health of the farm operators, consumers and the environment. Synthetic pesticides are generally persistent in environment. Entering in food chain they destroy the microbial diversity and cause ecological imbalance. Their indiscriminate use has resulted in development of resistance among insects to insecticides, upsetting of balance in nature and resources of treated populations. Natural pest control using the botanical pesticides is safer to the user and the environment because they break down into harmless compounds within hours or days in the presence of sunlight. Plants with pesticidal properties have been in nature for millions of years without any ill or adverse effects on the ecosystem. They are easily decomposed by many microbes common in most soils. They help in the maintenance of biological diversity of predators and human health hazards. Botanical pesticides formulated from plants are biodegradable and their use in crop protection is a practical sustainable alternative. Which of the following statements is/are correct regarding biopesticides? 1. They are not hazardous to human health. 2. They are persistent in environment. 3. They are essential to maintain the biodiversity of any ecosystem. Select the correct answer using the code given below.
Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
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Why are ants called the 'Earth's' most successful species?
Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
Ants have been living on the earth for more than 100 million years and can be found almost anywhere on the planet. It is estimated that there are about 20000 different species of ants. For this reason ants have been called Earth's most successful species. If you watch ants for any length of time you will see that they really do communicate with each other and very effectively too. Ants communicate by touching each other with their antennae. Ants also use chemicals called pheromones to leave scent trails for other ants to follow. Ants build many different types of homes. Many ants build simple little mounds out of dirt or sand. Other ants use small sticks mixed with dirt and sand to make a stronger mound that offers protection from rain. Western Harvester ants make a small mound on top, but then tunnels up to 15 feet straight down to hibernate during winter. Ant mounds consist of many chambers connected by tunnels. Different chambers are used for nurseries, food storage, and resting places for the worker ants. Some ants live in wood like termites. Army ants don't make a home at all but travel in a large groups searching for food. Ants are social insects which means they live in large colonies or groups. Some colonies consist of millions of ants. There are three types of ants in each species, the queen, the sterile female workers and males. The male ants only serve one purpose, to mate with future queen ants and do not live very long. The queen grows to adulthood, mates, and then spends rest of her life laying eggs. A colony may have only one queen, or there may be many queens depending on the species. Ants go through four stages of development: egg, larva, pupa and adult. Antennae are used by ants to
Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
Ants have been living on the earth for more than 100 million years and can be found almost anywhere on the planet. It is estimated that there are about 20000 different species of ants. For this reason ants have been called Earth's most successful species. If you watch ants for any length of time you will see that they really do communicate with each other and very effectively too. Ants communicate by touching each other with their antennae. Ants also use chemicals called pheromones to leave scent trails for other ants to follow. Ants build many different types of homes. Many ants build simple little mounds out of dirt or sand. Other ants use small sticks mixed with dirt and sand to make a stronger mound that offers protection from rain. Western Harvester ants make a small mound on top, but then tunnels up to 15 feet straight down to hibernate during winter. Ant mounds consist of many chambers connected by tunnels. Different chambers are used for nurseries, food storage, and resting places for the worker ants. Some ants live in wood like termites. Army ants don't make a home at all but travel in a large groups searching for food. Ants are social insects which means they live in large colonies or groups. Some colonies consist of millions of ants. There are three types of ants in each species, the queen, the sterile female workers and males. The male ants only serve one purpose, to mate with future queen ants and do not live very long. The queen grows to adulthood, mates, and then spends rest of her life laying eggs. A colony may have only one queen, or there may be many queens depending on the species. Ants go through four stages of development: egg, larva, pupa and adult. What does the Western Harvester do in winter ?
Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
Ants have been living on the earth for more than 100 million years and can be found almost anywhere on the planet. It is estimated that there are about 20000 different species of ants. For this reason ants have been called Earth's most successful species. If you watch ants for any length of time you will see that they really do communicate with each other and very effectively too. Ants communicate by touching each other with their antennae. Ants also use chemicals called pheromones to leave scent trails for other ants to follow. Ants build many different types of homes. Many ants build simple little mounds out of dirt or sand. Other ants use small sticks mixed with dirt and sand to make a stronger mound that offers protection from rain. Western Harvester ants make a small mound on top, but then tunnels up to 15 feet straight down to hibernate during winter. Ant mounds consist of many chambers connected by tunnels. Different chambers are used for nurseries, food storage, and resting places for the worker ants. Some ants live in wood like termites. Army ants don't make a home at all but travel in a large groups searching for food. Ants are social insects which means they live in large colonies or groups. Some colonies consist of millions of ants. There are three types of ants in each species, the queen, the sterile female workers and males. The male ants only serve one purpose, to mate with future queen ants and do not live very long. The queen grows to adulthood, mates, and then spends rest of her life laying eggs. A colony may have only one queen, or there may be many queens depending on the species. Ants go through four stages of development: egg, larva, pupa and adult. What kind of homes do the army of ants build ?
Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
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Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
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Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
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Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.
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