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2 years ago

In the ovarian cycle, the surge of ______ triggers ovulation.

Biology

1 answer:

Cloud [144]2 years ago

3 0

In the ovarian cycle, the surge of LH triggers ovulation.

During evolution when the level of estrogen is sufficiently high, it produces a sudden release of LH, usually around day thirteen of the cycle. This LH peak triggers a complex set of events within the follicles that result in the final maturation of the egg and follicular collapse with egg extrusion.

A surge in LH causes your ovary to release a mature egg around the second week of each menstrual cycle. A high LH level around this time means that you're at that moment in your cycle when you're most likely to get pregnant. Levels of LH are low for most of the monthly menstrual cycle. However, around the middle of the cycle, when the developing egg reaches a certain size, LH levels surge to become very high.

To learn more about LH , here

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Surfactant helps to prevent the alveoli from collapsing by

Y_Kistochka [10]

Answer:

The correct answer will be- by lowering the surface tension at air/liquid transition.

Explanation:

Pulmonary surfactant is the mixture of proteins and lipids produced by the type II epithelial cells.

The surfactant is selected into the alveolar sacs where the surfactant reduces the surface tension of the air/liquid interface to 1 mN/m. The lipid content of the surfactant called dipalmitoylphosphatidylcholine or DPPC forms a surface film which lowers the surface tension.

This power surface tension reduces the work of breathing and thus prevent the alveolar sac from rupture or collapse.

Thus, by lowering the surface tension at air/liquid transition is the correct answer.

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4 years ago

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vitfil [10]

About a week here’s a photo if it helps

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4 years ago

2. If scientists identify an animal with bilateral symmetry and no segmentation, which phylum can it definitely not belong to?

earnstyle [38]

The answer is B. Annelids

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3 years ago

Rosa drew a flow chart of the carbon cycle. Flow chart of the carbon cycle with 4 boxes connected by arrows. Box 1: carbon dioxi

leonid [27]

Answer:

(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste.

Explanation:

(a) X: Producers undergo photosynthesis. Y: Decomposers return carbon to the soil and release waste.

(b) X: Decomposers return carbon to the soil and release waste. Y: Producers undergo photosynthesis.

(c) X: Decomposers take in carbon dioxide. Y: Producers absorb carbon through their roots.

(d)X: Producers absorb carbon through their roots. Y: Decomposers take in carbon dioxide.

Box 2 (X) would be the process through which producers fix carbon dioxide to produce their own food, the carbohydrate. The process is otherwise known as photosynthesis and can be represented by the following equation:

$6CO_2 + 6H_20 --> C_6H_1_2O_6 + 6O_2$

Box 4 (Y) would be the process of decomposition. Both producers and consumers eventually die and decompose in the soil. During this process, some of the carbon returns to the soil as organic matters while the process of microbial decomposition releases carbon dioxide into the atmosphere.

The correct option would be (a).

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3 years ago

Diffusion is movement of a molecule from an area of higher concentration to an area of lower concentration. True or false

Gemiola [76]

The answer is false hope this helps

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3 years ago