During the defecation reflex:

1. Internal abdominal pressure is increased: This happens because the muscles in the abdomen contract to help push the feces out of the body.

2. Abdominal wall muscles contract: The muscles in the abdominal wall also contract to help increase the pressure and push the feces out.

3. Glottis is closed: The glottis, which is the part of the larynx where the vocal cords are located, closes during defecation. This is to prevent any additional pressure from escaping through the mouth or nose.

4. Diaphragm is lowered: The diaphragm, a muscle that helps with breathing, lowers during the defecation reflex. This also helps to increase the pressure in the abdomen and aid in the expulsion of feces.

So, the correct answer is not listed in the options. The correct answer should be "Internal abdominal pressure is increased, abdominal wall muscles contract, glottis is closed, and diaphragm is lowered."

Question

During the defecation reflex:

1. Internal abdominal pressure is increased: This happens because the muscles in the abdomen contract to help push the feces out of the body.

2. Abdominal wall muscles contract: The muscles in the abdominal wall also contract to help increase the pressure and push the feces out.

3. Glottis is closed: The glottis, which is the part of the larynx where the vocal cords are located, closes during defecation. This is to prevent any additional pressure from escaping through the mouth or nose.

4. Diaphragm is lowered: The diaphragm, a muscle that helps with breathing, lowers during the defecation reflex. This also helps to increase the pressure in the abdomen and aid in the expulsion of feces.

So, the correct answer is not listed in the options. The correct answer should be "Internal abdominal pressure is increased, abdominal wall muscles contract, glottis is closed, and diaphragm is lowered."

Knowee AI · Accepted Answer

During the defecation reflex:

1. Internal abdominal pressure is increased: This happens because the muscles in the abdomen contract to help push the feces out of the body.

2. Abdominal wall muscles contract: The muscles in the abdominal wall also contract to help increase the pressure and push the feces out.

3. Glottis is closed: The glottis, which is the part of the larynx where the vocal cords are located, closes during defecation. This is to prevent any additional pressure from escaping through the mouth or nose.

4. Diaphragm is lowered: The diaphragm, a muscle that helps with breathing, lowers during the defecation reflex. This also helps to increase the pressure in the abdomen and aid in the expulsion of feces.

So, the correct answer is not listed in the options. The correct answer should be "Internal abdominal pressure is increased, abdominal wall muscles contract, glottis is closed, and diaphragm is lowered."

Which of the following occurs during the defecation reflex?Multiple ChoiceInternal abdominal pressure is decreased.Abdominal wall muscles relax.Glottis is opened.Diaphragm is lowered.

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