Homeostasis and Body Temperature Regulation Quiz

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the definition of homeostasis according to the text?

The ability of an organism to regulate its internal environment to maintain a stable, constant condition.
The ability of an organism to adapt to changes in the external environment.
The ability of an organism to maintain its body temperature within certain boundaries, even when the surrounding temperature is very different. (correct)
The ability of an organism to produce and lose heat equally in different parts of the body.

What was the significance of the introduction of thermometers according to the text?

It allowed for the measurement of exact data on the temperature of animals. (correct)
It demonstrated that heat production and heat loss vary considerably in different parts of the body.
It showed that the circulation of blood brings about a mean temperature of the internal parts.
It led to the discovery of local temperature differences within the body.

What does the text say about the circulation of blood and its effect on body temperature?

The circulation of blood is responsible for the production and loss of heat in different parts of the body.
The circulation of blood has no effect on maintaining a stable body temperature.
The circulation of blood tends to bring about a mean temperature of the internal parts. (correct)
The circulation of blood causes local temperature differences within the body.

What does the text say about heat production and heat loss in different parts of the body?

Heat production and heat loss vary considerably in different parts of the body. (D) Signup and view all the answers

What is the main purpose of the text?

To explain the concept of homeostasis in organisms. (D) Signup and view all the answers

What is the primary cause of hypothermia according to the text?

The homeostatic control mechanisms of heat within the body malfunction, causing the body to lose heat faster than producing it (C) Signup and view all the answers

What is the definition of normal body temperature according to the text?

Around 37 °C (99 °F) (C) Signup and view all the answers

What is the main difference between endotherms and ectotherms according to the text?

All of the above (D) Signup and view all the answers

What is the definition of hypothermia according to the text?

A condition where the body temperature decreases below normal levels (A) Signup and view all the answers

What is the definition of hyperthermia according to the text?

A condition where the body temperature increases significantly above normal (A) Signup and view all the answers

What is the temperature range for hypothermia according to the text?

Below 35 °C (95 °F) (D) Signup and view all the answers

Flashcards are hidden until you start studying

Study Notes

Homeostasis

Homeostasis is the ability of an organism to maintain its body temperature within certain boundaries, despite changes in surrounding temperature.
The introduction of thermometers enabled the collection of exact data on animal body temperatures, revealing local differences in heat production and heat loss.
The circulation of blood helps to maintain a mean temperature of the internal parts of the body.

Temperature Regulation

Hyperthermia occurs when the body temperature increases significantly above normal, typically above 37 °C (99 °F).
Lethal hyperthermia can occur in humans when the wet bulb temperature is sustained above 35 °C (95 °F) for six hours.
Hypothermia occurs when the body temperature decreases below normal levels, typically below 35 °C (95 °F).
Normal body temperature is around 37 °C (99 °F).

Endotherms vs. Ectotherms

Endotherms have a larger amount of mitochondria per cell than ectotherms, enabling them to generate heat through increased metabolism.
Endothermic animals require several times as much food as ectothermic animals to sustain their higher metabolism.
They also require a more sustained supply of metabolic fuel production to maintain their body temperature.