Blog

Patient W has experienced a sudden loss in endurance over the past several months. His cardiac output is strong, but his heart rate is much higher than normal. His alveolar PO2 is about 150 mmHg, higher than normal, and he is breathing hard all of the time. His alveolar PCO2 is 20 mm Hg, lower than normal. His arterial PO2 is lower than normal, as is his arterial percent hemoglobin saturation (which is below 70%). Which of the following is most likely to be a cause of these symptoms.

During long-term, sustainable exercise..

Ectotherms ….

Hypoventilation (low ventilation at the same metabolic rate) in an otherwise healthy person causes: 

Which solution is hypo-osmotic to a normal mammalian cell?

Which of the following can act as a diuretic? 

Epinephrine can stimulate liver cells by activating the cAMP second messenger system. Which of the following are likely responses of liver cells to epinephrine stimulation?

A 1 kg mammal uses about 5 kcal of energy per hour. It eats hay, which contain about 2000 kcal per kg. Which equation will allow you to calculate how much hay it needs to eat per day to achieve a balanced weight?  

Which of the following would be likely to decrease the strength of a synapse? 

Choose the best answer for “motor unit”.