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777dan777 [17]
4 years ago
8

Be able to describe the cardiac cycle using the appropriate chambers, valves, and vessels. What are the stages of the cardiac cy

cle?
Medicine
1 answer:
Natasha_Volkova [10]4 years ago
4 0

Answer:

The heart beat sequence is the sequence of events that occurs when the heart beats. As the heart beats, blood circulates through the pulmonary and systemic circuits of the body. There are two stages of the heart beat cycle: the diastole phase and the systole phase. In the diastole phase, the ventricles of the heart relax and the heart fills with blood. In the systole phase, the ventricles contract and pump blood from the heart to the arteries. A cardiac cycle is completed when the chambers of the heart fill with blood and blood from the heart is pumped.

Explanation:

1. Ventricular Diastole

For the period of ventricular diastole, the atria and ventricles of the heart are relaxed and the atrioventricular valves are open. The oxygen-free blood that returns to the heart from the body after the last cardiac cycle passes through the superior and inferior cava veins and flows into the right atrium.

Open atrioventricular valves (tricuspid and mitral) allow blood to pass through the atria into the ventricles. The impulses of the sinoatrial node (SA) travel to the atrioventricular node (AV) and the AV node sends a signal that triggers the contraction of both atria. As per a result of this reduction, the right atrium empties its contents into the right ventricle. The tricuspid valve, located between the right atrium and the right ventricle, prevents blood from flowing into the right atrium.

2. Ventricular Systole

At the beginning of the ventricular systole period, the right ventricle, which is full of blood that passes from the right atrium, receives impulses from the fiber branches (Purkinje fibers) that carry electrical impulses that cause it to contract. When this occurs, the atrioventricular valves close and the semilunar valves (pulmonary and aortic valves) open.

Ventricular contraction causes oxygen depleted blood from the right ventricle to be pumped into the pulmonary artery. The pulmonary valve prevents blood from returning to the right ventricle. The pulmonary artery carries deoxygenated blood along the pulmonary circuit to the lungs. Here, the plasma gathers oxygen and returns to the left atrium of the heart through the pulmonary veins.

3. Atrial Diastole

In the period of atrial diastole, semilunar valves close and atrioventricular valves open. Oxygenated blood from the pulmonary veins fills the left atrium, while blood from the vena cava fills the right atrium. The SA node contracts again, causing both atria to do the same.

in the next step of process, atrial contraction causes the left atrium to empty its contents into the left ventricle and the right atrium to empty its contents into the right ventricle. The mitral valve, located between the left atrium and the left ventricle, prevents oxygenated blood from returning to the left atrium.

4. Atrial Systole

During the period of atrial systole, the atrioventricular valves close and the semilunar valves open. The ventricles receive impulses to contract. Oxygenated blood in the left ventricle is pumped into the aorta and the aortic valve prevents oxygenated blood from returning to the left ventricle. The oxygen-depleted blood is also pumped from the right ventricle to the pulmonary artery at this time.

The aorta branches to provide oxygenated blood to all parts of the body through systemic circulation. After its journey through the body, deoxygenated blood returns to the heart through the vena cava.

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Answer:

I remember back in high school I conducted an experiment involving two Petri-dishes. Both had swabs from my kitchen sink (a lot of bacteria). The difference was that I used Lysol versus Clorox.

Explanation:

You can start here. Secondly, formulate a good hypothesis and test it. For example, you can say I believe Lysol works better than "X-Brand" or "Y-Brand".

Then list the results.

I hope this helps.

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3 years ago
What are the benefits of performing a clia-waived rapid test in the medical office?.
tresset_1 [31]

Giving the doctor a clear indication of the issue, enabling early therapy to begin, and being practical for the patient.

<h3>What do you mean by Clia-waived rapid test ?</h3>

According to the CLIA law, tests that the CDC or FDA deem to be sufficiently straightforward that there is minimal danger of error are waived.

  • Pregnancy tests, faecal occult blood tests, some urine tests, and some tests for glucose and cholesterol are also exempt.

  • The quick availability of results while the patient is available for immediate follow-up, the need for little training in simple tests, and the portability of many waived tests all contribute to the advantages of performing them.

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3 0
2 years ago
When there may be confusion about patient names, the procedure to use is
Jlenok [28]

Answer:

Patient identifier options include:

Name.

Assigned identification number (e.g., medical record number)

Date of birth.

Phone number.

Social security number.

Address.

Photo.

Explanation:

There are many Nurses or Doctors who gets confused about their patients name. Which i think is very unprofessional because you should always know you patient name you may give the the wrong treatment...thinking you already know them. Iv'e had this happen to me and felt happy to answer you question.

3 0
3 years ago
An example of Sheet-forming collagens
Maslowich

Answer:

types 4,8,10

Explanation:

1.

Fibril-forming collagens (I, II, III, V, XI, XXIV, XXVII);

2.

Fibril-associated collagens with interrupted triple helices (FACITs) (IX, XII, XIV, XVI, XIX, XX, XXI, XXII). The FACITs do not form fibrils by themselves but they are associated with the surface of collagen fibrils.

3.

Network-forming collagens (IV, VIII, X) form a pattern in which four molecules assemble via their amino-terminal 7S domain to form tetramers while two molecules assemble via their carboxy-terminal NC1 domain to form NC1 dimers

4.

Membrane collagens (XIII, XVII, XXIII, XXV)

7 0
3 years ago
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Morphine sulfate grain 1/4 po is ordered. On hand is Morphine sultate 10 mg tablets. How many tablets will you give?
vampirchik [111]

Answer:

1 tablet and a half.

Explanation:

1 mg is equivalent to 1/60gr

              or

1 gr is equivalent to 60 mg.

Since you need to give 1/4 gr of morphine sulfate, you need to give 1/4 of 60mg. If you will calculate that, you will need to give 15 mg of morphine sulfate. Since the tablets come in 10 mg, you will need to give 1 tablet and a half.

You can also compute it this way:

\dfrac{1}{4}gr\times \dfrac{60mg}{1gr} = \dfrac{60mg}{4}=15mg

15mg\times \dfrac{1 tablet}{10mg} = 1.5 tablets

5 0
3 years ago
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