18 Questions
What is the normal body temperature set point for humans?
37°C
Which organ in the body behaves much like a thermostat in regulating body temperature?
Hypothalamus
What is the purpose of shivering when the body experiences a sharp drop in temperature?
To stimulate metabolic activity and produce more heat
What hormone is released by the adrenal gland in response to a drop in temperature?
Epinephrine
Which gland is stimulated to release thyroid-stimulating hormone by the hypothalamus?
Pituitary Gland
How does the hypothalamus respond when the body temperature increases?
It slows down heat production
Which of the following organisms are able to maintain a constant internal body temperature through metabolic activity?
Birds and mammals
What is the term used to describe organisms that allow their internal temperature to fluctuate with the external environment?
Poikilotherms
The maintenance of a relatively constant internal environment in a varying external environment is called:
Homeostasis
Which of the following processes is NOT involved in homeostasis?
Acclimatization to external environmental conditions
What is the primary mechanism that allows birds and mammals to maintain a constant internal body temperature?
Metabolic activity
Which of the following statements about homeostasis is true?
It involves the flow of external environmental information into a biological system
What is the primary mechanism used by homeotherms to maintain homeostasis?
Physiological regulation
What is the term used to describe the limited range of tolerance within which an organism's homeostatic system operates?
Homeostatic plateau
What happens when the environmental temperature becomes too hot for an organism to maintain homeostasis?
Positive feedback reinforces the deviation from the set point
Which of the following statements accurately describes the difference between living and mechanical systems in terms of homeostasis?
Living systems have a limited range of tolerance, while mechanical systems have a fixed set point
What is the primary function of negative feedback in homeostatic regulation?
To inhibit strong movements away from the set point
Which of the following organisms are likely to rely more heavily on behavioral and morphological mechanisms for maintaining homeostasis, in addition to physiological regulation?
Poikilotherms
Test your knowledge on how the body maintains internal temperature in extreme environmental conditions, exploring the processes of heat generation and dissipation.
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