Biology, 21.03.2020 09:41 ogc2001

During digestion, hydrochloric acid (HCl) lowers the stomach's pH and this causes the enzyme pepsinogen to be converted to its active form, called pepsin. Pepsin is a proteolytic enzyme, which means it cleaves (breaks) peptide bonds assocciated with food particles. The enzyme pepsin can also cleave pepsinogen into pepsin, and this causes the rate at which pepsinogen is converted to pepsin to increase. This is an example of:.
A) A negative feedback loop
B) A positive feedback loop
C) The importance of keeping your stomach pH high during digestion
D) The importance of hormones in activating pepsin

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Answer from: rose8969

B) A positive feedback loop

Explanation:

In a feedback loop, when an action continues to occur due to the end product of an action, then, a positive feedback loop has taken place. The main action is triggered or enhanced by a positive feedback loop.

It is mainly stopped by a negative feedback loop.

In this case, since hydrochloric acid (HCl) lowers the stomach's pH during digestion and this causes the enzyme pepsinogen to be converted to pepsin and the enzyme pepsin can also cleave pepsinogen into pepsin, then this causes the rate at which pepsinogen is converted to pepsin to increase, it can be said that a positive feedback loop has taken place. It is a positive feedback loop because it enhances the action (when pepsinogen is converted to pepsin).

Answer from: Quest

increase soil erosion reduce soil erosion

cattle grazing hydroseeding

deforestation contour plowing

planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

Answer from: Quest

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc. without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.

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During digestion, hydrochloric acid (HCl) lowers the stomach's pH and this causes the enzyme pepsino...

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