Chemistry for Physiology

Blood has pH in the range 7.35–7.45. The other choices all have pH = 7.0

Saturated refers to the number of single bonds around carbon atoms. The maximum is four if there are no double bonds.

A neutron is one of the constituents of the atomic nucleus.

This is a definition of an acid.

Salts, having particles that are electrically charged, are more likely to be soluble in water.

A high melting point is characteristic of ionic substances. Some covalent compounds are soluble in water.

Of course O₂ diffuses from alveoli to blood, while CO₂ diffuses from blood to alveoli. Or by considering movement down the concentration gradients: O₂ from 104 to 40 mmHg and CO₂ from 46 to 40 mmHg.

Osmosis is a word used to describe the movement of water through a membrane from the side where the concentration of water molecules is greater to the side where the water concentration is lower.

The contents of the gut are not regarded as one of the body’s fluid compartments.

N requires three electrons to complete its outer shell (it occurs in column VA of the periodic table), while H requires one. Hence three H must attach to a single N.