Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach. A low pH (1.5 to 2) activates pepsin. Acetylcholine, gastrin, and histamine stimulate the proton pump in parietal cells to release hydrogen ions and decrease pH.

5 0

2 years ago

In a mating between two individuals that are heterozygous for a recessive lethal allele that is expressed in utero, what genotyp

musickatia [10]

Answer: 1:2:0

Explanation:

6 0

3 years ago

How does water and other molecules move across the membrane and in various solutions to maintain homeostasis

Kaylis [27]

Osmosis of Water Across the Membrane. Osmosis is the tendency for water molecules to move from where there is a higher concentration to where there is a lower one. ... The cell membrane helps to regulate and slow down the flow of water into the cell. This is yet another way that the cell membrane helps maintain homeostasis

3 0

2 years ago

The guppy is a species of small freshwater fish. Scientists observed that the average size of guppies in the pond decreased afte

zepelin [54]

Answer:

The answer is natural selection

Explanation:

3 0

3 years ago