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seropon [69]
3 years ago
11

Opening and closing of the heart valves is caused by

Biology
1 answer:
storchak [24]3 years ago
6 0

Answer:

The pressure differences on either side of the valve.

Explanation:

The heart valves open and close passively because of pressure differences on either side of the valve. When pressure is greater behind the valve, the leaflets are blown open and the blood flows through the valve. However, when pressure is greater in front of the valve, the leaflets snap shut and blood flow is stopped.

Hope this helps!

have a blessed day

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During the ____ phase of the menstrual cycle, the zona pellucida develops around each egg.
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During the menstrual phase of the menstrual cycle, the zona pellucida develops around each egg.

The menstrual cycle is count from the first day of one period to the first day of the next period. The menstrual cycle differs in all women. This cycle has four main phases namely the follicular phase, ovulation phase, luteal phase and the menstrual phase.

The follicular phase starts on day one. The follicle stimulating hormone or FSH and estrogen rise. This is followed by the ovulation phase in which the egg is released. In the luteal phase corpus luteum produces progesterone and estrogen. In the menstrual phase of the menstrual cycle, the zona pellucida develops around each egg.

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What procedure did you use to complete the lab <br> The Lab Name Is Energy Transfer.
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Answer: Energy transfer could come through condoctours (metal, or copper) to another object to power a bulb, speaker or any other electrical gizmo. (This can get a brainliest answer)

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2 years ago
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Both lysozyme and penicillin disrupt the bacterial cell wall peptidoglycan, leading to cell lysis. However, their mechanisms of
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Jonah and Cathy were sure that they had correctly answered most of their exam questions. However, they each scored less than 60
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Answer:

The correct answer is : Overconfidence.

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A person who thinks his or her sense of direction or judgement is more accurate than it is actually is is known as overconfident, and this phenomenon is known as the overconfidence.

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