PHSI3011 06-2 Thermoregulation

Descripción

PHSI3011 06-2 Thermoregulation
Michael Jardine
Test por Michael Jardine, actualizado hace más de 1 año
Michael Jardine
Creado por Michael Jardine hace alrededor de 7 años
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Resumen del Recurso

Pregunta 1

Pregunta
Hairy skin is innervated by [blank_start]__________[blank_end] nerves; whereas non-hairy skin is innervated by [blank_start]__________[blank_end].
Respuesta
  • Both
  • Vasoconstrictor
  • Vasodilator

Pregunta 2

Pregunta
Heat-induced increases in blood flow are due to [blank_start]__________[blank_end] of skin arterioles and [blank_start]__________[blank_end] of arteriovenous anastomoses.
Respuesta
  • Vasodilation
  • Vasoconstriction
  • Opening up
  • Closing down

Pregunta 3

Pregunta
[blank_start]__________[blank_end] is the (a?) neurotransmitter for vasodilator nerves, but nitric oxide mediates its vasodilator action. Cholinergic nerves that induce sweating may be the same ones that induce vasodilation. [blank_start]__________[blank_end] in sweat may also contribute to the vasodilation (via nitric oxide).
Respuesta
  • Acetylcholine
  • Epinephrine (/Adrenaline)
  • Norepinephrine (/Noradrenaline)
  • Bradykinin
  • Thyroxine

Pregunta 4

Pregunta
During extreme heat, skin blood flow can [blank_start]__________[blank_end] from [blank_start]__________[blank_end] to [blank_start]__________[blank_end].
Respuesta
  • Increase
  • Decrease
  • ~300 mL/min
  • ~800 mL/min
  • ~3 L/min
  • ~8 L/min

Pregunta 5

Pregunta
What impact does dehydration have on the effectiveness of evaporative heat loss?
Respuesta
  • It reduces it
  • It greatens it

Pregunta 6

Pregunta
During exercise, what happens to the Mean Skin Temperature?
Respuesta
  • Not much
  • It drops
  • It rises

Pregunta 7

Pregunta
In response to increased “cold” receptor activity, the Autonomic and Somatomotor pathways both try to prevent hypothermia (/hypochondria?). How? Autonomic response → [blank_start]__________[blank_end]; Somatomotor response → [blank_start]__________[blank_end];
Respuesta
  • ↑ Heat conservation
  • ↓ Heat conservation
  • ↑ Heat production
  • ↓ Heat production
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