can someone help me to select the correct answer for these 3

can someone help me to select the correct answer for these 3 questions?

Important in production of gastric juice Choose l

Solution

One important component of gastric juice is pepsin. Pepsin is the chief digestive enzyme in the stomach that breaks down proteins. We see that chief cells produce pepsinogen (an inactive form of pepsin). Pepsinogen is converted to pepsin when the parietal cells found within the gastric glands secrete hydrochloric acid.

Important ions are sodium, potacium which are involved in ion transport.

An electrolyte is any substance that dissociates into ions in aqueous solution. Ions can be positively charged (cations) or negatively charged (anions). Sodium (Na+), Chloride (Cl-)
Potassium (K+), Phosphate (HPO4--) Calcium (Ca++) Sulfate (SO4--)Magnesium (Mg++) Bicarbonate (HCO3-)

The major electrolytes found in the human body are:
Interstitial fluid and blood plasma are similar in their electrolyte makeup. Na+ and Cl- being the major electrolytes. In the intracellular fluid, K+ and HPO4- are the major electrolytes.