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kvasek [131]
4 years ago
15

What is the basis for the delay between the atrial and ventricular contractions in a normal heart?

Biology
1 answer:
earnstyle [38]4 years ago
5 0

The main responsible for the delay among the atrial and ventricular contractions is the action potential conduction velocity of the AV node cells. If the atria and ventricles contract simultaneously, atria cannot give any help in filling the ventricles, which is needed, especially in those with stiff ventricles as in the elderly. Hence atria have to contract first and then the ventricles.

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Which statement accurately describes nonrenewable and renewable energy sources A. They take Millions of years to form and should
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What are the three characteristics of fat cells​
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Explain the digestion process of a complex carbohydrate by arranging the statements in the order that they occur.
andreyandreev [35.5K]

Answer: The question is incomplete because the options are not given, here are the options from another websites.

A.The enzyme, amylase. which is present in saliva breaks potysaccharide chains into disaccharides.

B. Other enzymes in the small intestine further break the potysaccharide into monosaccharides.

C. You take a bite and to chew the complex carbohydrate into smaller pieces.

D.Amylase is deactivated by the low pH in the stomach.

E.. Monosaccharides are absorbed through the intestinal wad.

The correct order are,

C. You take a bite and to chew the complex carbohydrate into smaller pieces.

A.The enzyme, amylase. which is present in saliva breaks potysaccharide chains into disaccharides.

D.Amylase is deactivated by the low pH in the stomach.

B. Other enzymes in the small intestine further break the potysaccharide into monosaccharides

.E. Monosaccharides are absorbed through the intestinal wad

Explanation:

Carbohydrates are complex or large molecules are they are found in rice, bread e.t.c

Digestion of carbohydrates start from the mouth through a process called mastication i.e chewing of the carbohydrates. The salivary gland then secrete the salivary amylase which act on the chewed carbohydrates. The salivary amylase breaks down amylose and amylopectin present in starches into smaller chains of glucose which is called dextrins and maltose. When it get to the stomach, the amylase cannot further break it because it does not work in acidic conditions. The substance form chyme in the upper stomach and pancreatic enzymes act on it to break it down into simple sugar glucose. The pancreatic enzymes include sucrase, maltase and lactase.

Sucrase breakdown sucrose into glucose and fructose, maltase breakdown maltose in two molecules of glucose and lactase breakdown lactose into galactose and glucose. The simple sugar are then absorbed into the blood through the intestinal wall.

7 0
3 years ago
.....................................................
defon

Hay 53 puntos, creo, talvez está bien

4 0
3 years ago
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