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Autor(es):
Algunos ejemplos de esta serie de preguntas de práctica
1.
What\'s the definition of homeostasis?
Respuesta: the control or stabilisation of the internal environment
2.
What is the difference between a regulator & a conformer?
Respuesta: Conformers are more primitive and cannot regulate their internal environment (so are therefore restricted to more constant environments), whereas regulators are able to adapt and maintain their internal environment
3.
Give examples of some ways that regulators can control their internal environment?
Respuesta: - Shivering (muscle contraction heats them up if it\'s cold) - Sweating (evaporation of sweat cools them down) - Vasodilation (blood vessels closer to skin surface = heat lost) - Vasoconstriction (blood vessels further from skin surface = heat retained)
4.
Why do we need homeostasis?
Respuesta: For optimal metabolic efficiency
5.
What should the core body temperature be maintained at?
Respuesta: 37°C
6.
What should the pH of the blood be maintained at?
Respuesta: pH 7.4
7.
What are the normal glucose ranges?
Respuesta: Preprandial (before eating): 4 - 5.9 mmol/L Postprandial (after eating): < 7.8 mmol/L
8.
What percentage of body weight is water?
Respuesta: 60%
9.
How much of the water content of the body is made up of extracellular fluid and how much is intracellular fluid?
Respuesta: 33% of the water in our bodies is extracellular fluid, the other 67% is intracellular fluid (cytosol)
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