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leva [86]
3 years ago
8

Question 4 of 25

Biology
1 answer:
Katena32 [7]3 years ago
3 0

Answer:

b if a bananas is grow in direct sunlight it will contain more potassium

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Ventricular systole begins during the __________ phase of the cardiac cycle. Ventricular systole begins during the __________ ph
Zina [86]

Answer

              Ventricular systole begins during the  <u>isovolumetric contraction </u>phase of the cardiac cycle.

Explanation

1. Ventricular ejection

The forceful expulsion of blood from the ventricles into the aorta and the pulmonary arteries.

2. Isovolumetric contraction

                     The interval between the closing of the AV valves and the opening of the semilunar valves (aortic and pulmonary valves) is known as isovolumetric contraction. it is the beginig of systole. it is the first chamber systolic event. The myocardial muscle fibers have begun to shorten but have not developed enough pressure in the ventricles to overcome the aortic and pulmonary end-diastolic pressures and open the aortic and pulmonary valves. During this period of muscle fiber contraction, the ventricular volumes do not change.

3. Ventricular filling  

                 In this stage AV valve is opened and the blood that has accumulated in atria flow rapidly into ventricles. The ventricular volume increase rapidly. A third heart sound known as S3 is heared during this stage.

4. Isovolumetric relaxation

                  It is the beginning of diastole. The AV valve are closed at beginig. The atrium in diastole has been filling with blood on top of the closed AV valve, causing atrial pressure to rise gradually. The pressure in the ventricles continues to drop. Ventricular volume is at a minimum and is ready to be filled again with blood.


5 0
3 years ago
What term describes the strings of ribosomes that are attached to an RNA transcript at one time?
Gennadij [26K]

Answer:

Polyribosomes.

Explanation:

During translation, the subunits of a ribosome surround the transcript and read down stream until they reach the start codon and begin polypeptide synthesis. Once the start codon is exposed, it is available for another ribosome to form around it, thereby initiating another locale for translation. Together the strings of ribosomes are called polyribosomes.

6 0
3 years ago
4. In science, most concepts are related to other concepts. Which of the following is most closely related to the Law
myrzilka [38]

Answer:

C. energy can neither be created nor destroyed

Explanation:

The law of conservation of mass states that in a chemical reaction mass can neither be created nor destroyed. Similarly, the law of conservation of energy states that the amount of energy in an isolated system is conserved ie. the amount of energy can neither be created nor destroyed, but instead changes form.

5 0
3 years ago
The government must decide if an animal should be placed on the endangered species list. Which of the following conditions does
Misha Larkins [42]

Answer:

a

Explanation:

a

4 0
3 years ago
What does it mean to say that mass is conserved during a physical change?
kaheart [24]

Alright, so mass is a property of a physical body. During physical changes, such as acceleration, force, etc, the mass stays the same since we are not affecting its physical shape, just where it is physics wise. So yeah mass is conserved during a physical change.


(This is very confusing I'm bad at explaining things sorry)

5 0
3 years ago
Read 2 more answers
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