1. What are the physiological advantages of a heart that is divided into four chambers? 2....

1. What are the physiological advantages of a heart that is divided into four chambers?

2. Discuss what would happen to a human that is born with a heart in which the septum that separates the heart atria has a hole.

A person has been fasting overnight and when this person wakes up the person drinks a regular Coca-Cola for breakfast. The graph below indicates the changes in blood glucose levels over time right before (1) the person drinks the Coca-Cola and 20 minutes after (2), as well as 3 hours after (3) the person drinks the coke.

3. Discuss from a physiological perspective why the glucose levels change in (1), (2), and (3).

4. Is there anything else you can conclude from these data?

Solutions

Expert Solution

1. There are physiological advantages of the heart being a 4 chambered system.The heart consists of 2 atria and 2 ventricles.A four-chambered heart is an enormous evolutionary advantage.

This chambered structure helps to

prevent the mixing up of the oxygenated and deoxygenated blood. This increases the efficiency of the respiratory gaseous transport.The blood coming from the left side of the heart is pure, fully oxygenated. This also helps in controlling the blood flow through the circulatory system.
The chambers divide the circulatory systems into two. The systemic and pulmonary systems.The right atrium sends deoxygenated blood from the body to the right ventricle, which then pumps it to the lungs via the pulmonary arteries.This reaches the left atrium via pulmonary veins (pulmonary circulation). The left atrium them sends oxygenated blood from the lungs to the left ventricle, which then pumps it to the body parts via the aorta and the deoxygenated blood reaches the right atrium via the venacavae (systemic circulation)

gladiator answered 1 year ago

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