Thermoregulation - High Flashcards
What is thermoregulation?
Regulation of body temperature
What responses regulate a high body temperature? (4)
Behavioural
Tissue
Blood Vessel
Metabolic
Which receptors detect changes in temperature?
Thermoreceptors in skin + hypothalamus
What modulates the behavioural response for high temp?
Hypothalamus’ thermoregulatory centre
Effector for behavioural response?
Cerebral cortex
Behavioural response to high temp? (5)
Remove clothing Turn on air-con Cold shower Reduce activity Spread out
Feedback for behavioural response?
Negative - lowers temp
Modulator for tissue response?
Hypothalamus’ thermoregulatory centre - Sympathetic nervous system
Effector of tissue response?
Sweat glands
Response of tissue response?
Secrete sweat - so sweat evaporates
Feedback of tissue response?
Negative
Lowers body temp
Modulator for blood vessel response?
Hypothalamus’ thermoregulatory centre
Effector of blood vessels response?
Arterioles’ smooth muscle
Response of the Blood vessels response?
Vasodilation - increased blood flow to extremities
Heat energy is lost via radiation
Feedback for tissue response?
Negative
Lowers body temp
What modulates the metabolic response to high temp and how?
Hypothalamus’ thermoregulatory centre - TSH inhibiting factor
Pituitary gland - secretes less TSH
Thyroid gland - secretes less thyroxine
Effector of metabolic response?
Somatic body cells
Response of metabolic response?
Metabolic rate decreases
= less cellular respiration
= less heat production
Feedback of metabolic response?
Negative
Lowers body temp
Which receptors detect change in temperature?
Thermoreceptors in skin + hypothalamus
