To move oxygen from the air in the lungs to the tissues, oxy…

To move oxygen from the air in the lungs to the tissues, oxygen must diffuse down its partial pressure gradient. Which set of partial pressures of oxygen PO₂ (in mmHg) at the alveolus –> systemic capillaries –> tissues, respectively, best supports oxygen movement from air to tissue?

The intrinsic factor is essential for vitamin absorption in…

The intrinsic factor is essential for vitamin absorption in the small intestine, and it is produced by cells in the stomach.Its deficiency can cause megaloblastic and neurologic damage due to impaired DNA synthesis and myelin maintenance. As a result, the patient may present with reduced carrying capacity, leading to fatigue, weakness, shortness of breath, pallor, and tachycardia.