A 7-week-old infant

is brought to the emergency department for severe hypothermia. Such a small

child does not have enough muscle mass to produce heat through muscle tremors,

and at the same time, his body has a large surface area causing easier heat

loss. Newborns and infants have a special way of producing heat through

non-shivering thermogenesis using brown adipose tissue. What does the basic

structure of this tissue look like?

A 62-year-old man has a red, warm, painful lesion on his skin that

extends across his calf from the popliteal fossa to the ankle. This condition

is diagnosed as cellulitis, a bacterial infection of the deeper layers of the

skin. The red colour, increased temperature, and pain of the affected area are

due to an inflammatory response to the infection. In the patient, this

inflammatory reaction is largely caused by the release of pro-inflammatory

substances from the cells of the immune system, which are abundant in the

connective tissue. Which of the following cell types are involved?

A student is reviewing how connective tissue structure correlates to function of an organ. Which of the following might be the source of the tissue in the figure below?

A 16-year-old boy

fell and injured his knee during the school’s recent game. A physical

examination showed strong instability of the knee and an MRI examination

confirmed a rupture of the anterior cruciate ligament. What type of tissue is

the anterior cruciate ligament?

Suposant que el gas del termòmetre és ideal, i que la pressió és de 82 kPa quan la temperatura és 20 ºC, quina serà la temperatura quan mesurem una pressió de 100 kPa?

Si les parets de l’esfera d’un termòmetre de gas fossin d’un material elàstic, aquest termòmetre:

En la escala Fahrenheit el zero absolut és:

A l’interior d’un termòmetre de gas hi ha 0,05 mols de nitrogen. Si incrementem a 0,08 mols la quantitat de nitrogen confinat en el termòmetre, el pendent de la recta que relaciona la temperatura mesurada en ordenades, i la pressió del gas en abscisses, amb respecte a la mateixa pendent quan tant sols hi havia 0,05 mols, haurà:

El termòmetre de gas va mesurant valors de pressió més petits del gas que conté a mida que la temperatura disminueix. Començant amb temperatures al voltant de l’ambient, podríem arribar a mesurar amb un termòmetre d’aquest tipus la pressió d’un gas que estigués a -300 graus Celsius?