Which of the following tastes may be detected at very low concentration. a. sweet, b. umami, c. bitter, or d. salty

Bitter

Explanation:

The bitter taste is described as an unpleasant and sharp taste that is detected even at very low concentrations as the taste buds that detect this bitter taste are very sensitive.

The lower threshold to detect the bitter taste at low concentrations is of evolutionary importance as it protects the organisms from ingesting toxic compounds as they have a bitter taste and hence, at a very low concentration they can be detected and rejected.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.