Which one of the following is NOT secreted by capillary endothelium?

• Prostacyclin

• Guanosine

• Endothelin

• Nitric oxide

The "Mayer waves" in the blood pressure orginate due to:

• systole and diastole of ventricle

• inspiration and expiration

• reflex oscilliation of neural pressure control mechanisms

• Bainbridge reflex

The maturation of red blood cells does not depend on:

• folic acid

• vitamin B₁₂

• pyridoxine

• tocopherol

Which one of the following is NOT a function of angiotenism II?

• Facilitates the release of norepinephrine from post-ganglionic sympathetic neurons.

• Increases the sensitivity of baroreflex by acting on brain

• Produces arteriolar contraction

• Increases the secretion of vasopressin

Based on the type of excretion of nitrogenous was, animals can be categorzied as ammonotelic, ureotelic and uricotelic. Given below are combinations of groups of organisms and type of excretion. Select the correct combination.

• Poriferans, adult amphibians,cartilaginous fishes are ammonotelic

• Ascaris, cockroaches, prawn are uricotelic

• Paramecium, amphibian tadpoles, crocodiles are mainly ammonotelic

• Humans, sharks and aquatic anurans are ureotelic