AP PSYCHOLOGY

Detailed explanation-1: -Although sodium appetite is generally considered in the context of body fluid homeostasis, salt preference increases food palatability, which may lead to chronic increases in the intake of salty foods. In contrast to the sodium appetite, most specific appetites are learned.

Detailed explanation-2: -23andMe researchers have identified 43 genetic markers (DNA locations) associated with preference for sweet or salty snacks. A few of these markers are in or near genes involved in brain development or function. Some are in genes associated either with metabolism or body mass.

Detailed explanation-3: -A salty or metallic taste in your mouth may be a sign of oral bleeding. This can happen for a number of reason, such as eating sharp foods, like chips, or brushing your gums too aggressively. If your gums regularly bleed after you floss or brush your teeth, you may be experiencing gum disease (gingivitis).

Detailed explanation-4: -Figure 2. Salty taste is simply the perception of sodium ions (Na+) in the saliva.