Module 8.4: Thermoregulation Flashcards
Body temperature is homeostatically regulated by the ________
Body temperature is homeostatically regulated by the hypothalamus
The ____ _______ coordinates the response to decreases in body temperature, whereas the ____ _______ coordinates the response to increases in body temperature
The posterior hypothalamus coordinates the response to decreases in body temperature, whereas the anterior hypothalamus coordinates the response to increases in body temperature
Thermal information is detected by
- _____ ______ located in the hypothalamus, central nervous system, and abdominal organs
- by ____ ______ located in the skin.
Thermal information is detected both by
- central thermoreceptors located in the hypothalamus, central nervous system, and abdominal organs and by
- peripheral thermoreceptors located in the skin.
Thermal information is integrated and compared to a set point in the ______\_, which then relays ______\_ information to the effectors in response to deviations from the set point
Thermal information is integrated and compared to a set point in the hypothalamus, which then relays efferent information to the effectors in response to deviations from the set point
Homeostatic control system for temperature regulation.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/306/221/894/q_image_thumb.jpg?1584556689)
Homeostatic control system for temperature regulation.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/306/221/894/a_image_thumb.jpg?1584556700)
Coordinated adjustments to both _____ ______ and ____ _____ occur in response to decreases and increases in internal core temperature
Coordinated adjustments to both heat production and heat loss occur in response to decreases and increases in internal core temperature
How is heat production increased in response to cold exposure (by the Posterior Hypothalamus)? (4)
- Increased muscle tone
- Shivering
- Increased voluntary exercise
- Nonshivering thermogenesis
How is heat loss decreased (ie heat conservation) in response to cold exposure (by the Posterior Hypothalamus)? (3)
- Skin vasoconstriction
- Postural Changes to reduce exposed surface area
- Warm clothing (behavioural adaptation)
How is heat production DECREASED (by the Anterior Hypothalamus) in response to heat exposure? (2)
- Decreased muscle tone
- Decreased voluntary exercise (behavioural)
How is heat loss INCREASED in response to heat exposure (by anterior hypothalamus)? (3)
- Skin vasodilation
- Sweating
- Cool clothing (behavioural)
What is Hyperthermia?
A prolonged increase in body temperature above the normal range and beyond the body’s ability to compensate
Hyperthermia may result physiologically from _____ or pathophysiologically from abnormalities associated with the ______ or ___________
Hyperthermia may result physiologically from exercise or pathophysiologically from abnormalities associated with the hypothalamus or metabolic rate
Heat exhaustion involves a drop in ________ and results from overactivity of the body’s ________ such that body temperature ______ despite the normal compensatory mechanisms such as sweating and vasodilation
Heat exhaustion involves a drop in blood pressure and results from overactivity of the body’s heat loss mechanisms such that body temperature increases despite the normal compensatory mechanisms such as sweating and vasodilation
Heat stroke is a more dangerous than _______
It is condition that results from a breakdown of the _______ ability of the hypothalamus such that body temperature _______ in the absence of the normal compensatory mechanisms
Heat stroke is a more dangerous than heat exhaustion.
It is condition that results from a breakdown of the thermoregulatory ability of the hypothalamus such that body temperature increases in the absence of the normal compensatory mechanisms
Hyperthermia does not include fever.
Fever is an increase in body temperature that results from an ________ to _____ or _______ and involves the release of ___________ from ______.
Hyperthermia does not include fever.
Fever is an increase in body temperature that results from an immune response to infection or inflammation and involves the release of endogenous pyrogens from macrophages.