What specific key factor starts the breathing process in a newborn infant?

1 answer:

4 0

Chemical factors: This is due to internal stimuli. Changes in the blood such as decrease in O2, increase in CO2 and decrease in PH cause impulse in the carotid artery which stimulates the respiratory centers in the medulla and cause breathing.

Mechanical factors: also called external stimuli. Compression of the fetal chest during delivery forces small amount of lung fluid out of the lungs. This increase in pressure in the chest draws air into the lungs.

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In which one of the following points does the induced fit model of enzyme action differ from the lock and key model? *

ss7ja [257]

Answer:

The correct option is the last option

Explanation:

Firstly, one must understand that the first three options are generally properties of an enzyme and how an enzyme-substrate (ES) complex is formed during a reaction.

Enzymes bind to substrate in two major ways based on the shape of the active site of the enzyme; the lock and key model and the induced fit. The lock and key model is a model in which the active site ordinarily has the shape that can "accommodate"/bind to the substrate directly without any need for any change in the shape of the neither the active site nor the substrate during the process of formation of the enzyme-substrate complex. The induced-fit model is the model <u>in which the active site of the enzyme and/or the substrate undergoes a change in shape as both of them draw close to each other because they ordinarily cannot fit/bind together; the shape of the active site and the substrate are not complementary</u>.

NOTE: The active site is the part of the enzyme in which the substrate binds to.

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IgorLugansk [536]

The answer would be D)
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hichkok12 [17]

Answer:

Its important because if you repeat you'll get consistent results.