Quiz
Regulation of Body Temperature- Physiology 2nd year- PMU
Questions in this quiz (15)
1Thermoreceptors are:
- Aactivated only by severe cold or severe hot
- Blocated on the superficial layers of the skin
- Ca subtype of nociceptors
- Don dendritic endings of A6 fibres and C fibres
- Eall of the above
2The most significant heat source in the body is:
- Acellular respiration
- Bconductive heat loss
- Cconvective heat loss
- Devaporation
- Eshivering
3A major means for conserving heat is:
- Avasodilatation of coetaneous blood vessels
- Bincreased metabolic rate
- Cvasoconstriction of coetaneous blood vessels
- Denhanced sweating
- Eincreased convective loss
4The thermoregulatory center is located in:
- Acortex
- Bvascular system
- Cseptal region
- Damygdale
- Ehypothalamus
5What is the normal body temperature?
- A81.1°C
- B36.9°C
- C98.6°C
- D21.7°C
- E39.5°C
6At which temperature does the excitation of the thermoreceptors begin to cause pain?
- Aat the temperature which causes tissue damage
- Bover 45°C
- Cat 30°C
- Dat 5°C
- Eb, and d
7Heat stroke is characteristically associated with:
- Aprofuse sweating
- Belevated basal metabolic rate
- Chot dry skin
- Da and b
- Eb and c
8As ambient temperature increases, heat loss increases by:
- Aradiation
- Bconvection
- Cconduction
- Devaporation
- Enone of the above
9Which of the following is not a function of skin?
- Arespiration
- Bexcretion
- Csensation
- Dthermoregulation
- Eprotection
10Following adaptation to a hot climate there is an increase in:
- Abasal metabolic rate
- Bheat loss by radiation and convection
- Curinary output
- Dthe ability to lose heat by sweating
- Edecreasing arteriovenous shunting of blood to venous plexus near the surface of the skin
11Heat - loss mechanisms:
- Aby radiation and convection increase when the ambient temperature decreases
- Bby evaporation; depend on the activity of sweat glands being under sympathetic muscarinic control
- Care controlled by the anterior hypothalamus
- Dcause an increase in sympathetic tone to skin blood vessels
- Edecrease arteriovenous shunting of blood to venous plexus near the surface of the skin
12The set-point temperature of the hypothalamus, triggering heat - loss or heat - generating mechanisms is:
- A34° C
- B37° C
- C20° C
- D36.3° C
- E30° C
13When the temperature of environment is above 34°C, the only heat-loss mechanism is:
- Aconvection
- Bradiation
- Cshivering
- Devaporation
- Eradiation and convection
14The set point level for body temperature is situated in:
- Aanterior hypothalamus
- Bskin
- Cspinal cord
- Dposterior hypothalamus
- Ebrown mast tissue
15The most potent mechanism for increasing heat production is:
- Aactivation of the parasympathetic nervous system
- Bthyroid hormone increasing the metabolic rate
- Cshivering
- Dradiation
- Edecrease in sympathetic tone to skin blood vessels
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- Regulation of Body Temperature- Physiology 2nd year- PMU
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- Med Student
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- English
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