M5.Lesson 1: Temperature Regulation and Homeostasis

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What is the primary function of a feedback mechanism?

To maintain the body's temperature
To control the rate of cellular respiration
To regulate the production of hormones
To amplify or inhibit a biological pathway (correct)

Which process is responsible for maintaining salt and water balance within the body?

Thermoregulation
Metabolism
Respiration
Osmoregulation (correct)

What is the difference between an electrolyte and a non-electrolyte?

An electrolyte is a compound found only in living organisms, while a non-electrolyte is not.
An electrolyte is a compound that is essential for cellular respiration, while a non-electrolyte is not.
An electrolyte is a compound that regulates water balance, while a non-electrolyte does not.
An electrolyte dissociates into ions when dissolved in water, while a non-electrolyte does not. (correct)

Which of the following is NOT a component of the homeostatic mechanism?

Regulator (B) Signup and view all the answers

What is the role of the control center in the homeostatic mechanism?

To match the data from the sensor with normal values and send a signal to the effector if necessary (A) Signup and view all the answers

Which of the following is an example of an effector in the homeostatic mechanism?

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

What is the main function of negative feedback in a biological system?

To maintain a variable within the normal range (B) Signup and view all the answers

Which of the following is NOT a part of the body's cooling down process regulated by negative feedback?

Shivering (A) Signup and view all the answers

Which mechanism helps in increasing heat loss from the body during cooling down?

Increased sweating (C) Signup and view all the answers

What is the role of adrenaline secretion in the body's response to heating up?

Breaks down glycogen into glucose (A) Signup and view all the answers

During body temperature regulation, what happens to blood vessels in the skin during heating up?

Vasoconstriction (A) Signup and view all the answers

What initiates deeper breathing and increased heat loss from the lungs when the body needs to cool down?

Increased sweating (C) Signup and view all the answers

Which of the following animals are ectotherms?

Reptiles, invertebrates, and amphibians (B) Signup and view all the answers

What is the primary function of the hypothalamus in thermoregulation?

Maintaining the set point for body temperature (B) Signup and view all the answers

Which of the following is NOT a key aspect of homeostasis?

Allowing unlimited fluctuations in internal conditions (A) Signup and view all the answers

What is the primary role of the immune system?

Fighting off invaders like bacteria and viruses (D) Signup and view all the answers

What happens during a fever?

The hypothalamus resets the thermostat to a higher value (A) Signup and view all the answers

Which of the following is a function of hormones in vertebrates?

Regulating energy storage and mobilization (D) Signup and view all the answers

What is the primary characteristic of endotherms?

They maintain a constant body temperature internally (D) Signup and view all the answers

Why is controlling body temperature crucial for maintaining homeostasis?

It affects many body functions, including muscle function (B) Signup and view all the answers

What is the primary function of a feedback mechanism in biology?

To bring the body toward or away from the normal, steady state (C) Signup and view all the answers

Which of the following statements about homeostasis is TRUE?

Maintaining homeostasis is crucial for an organism's survival (D) Signup and view all the answers

Which of the following statements about thermoregulation is true?

It is coordinated by the nervous system (B) Signup and view all the answers

What might happen if an organism's body temperature becomes too high or too low?

Brain injury or death may occur (C) Signup and view all the answers