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borishaifa [10]
3 years ago
13

Dysfunctional uterine bleeding (DUB) is caused by a. endometrial fibroid tumors. b. absent or diminished levels of progesterone.

c. endometrial inflammation. d. reproductive tract malignancies.
Biology
1 answer:
nikklg [1K]3 years ago
4 0

b. absent or diminished levels of progesterone

Explanation:

Dysfunctional uterine bleeding refers to abnormal uterine bleeding that causes the endometrial line to shred off in an abnormal manner.

Fibroid tumor, endometrial  inflammation and malignancies are indirect causes of uterine bleeding but most common cause is the hormonal imbalance.

Progesterone is responsible for development and maintenance of endometrium so absent or diminished levels of progesterone is the cause of DUB.

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ElenaW [278]

Answer:

The correct answer is "5-1-3-2-4".

Explanation:

Internalization of LDL particles into cells, is needed to form the intracellular vesicles known as endosomes. The order of events that allow for this process are:

5) LDL receptors migrate to the cell surface and cluster in clathrin-coated pits. Clathrin acts directing the receptors to the cell membrane region where endosomes are formed.

1) A combination of cholesterol and apolipoprotein binds to LDL receptors and becomes internalized as endocytotic vesicles. Once the receptors are in the proper cell membrane region, cholesterol and apolipoprotein are bound and internalized.

3) Several endocytotic vesicles fuse to form an endosome.

2) The environment of the endosome becomes acidic, which causes the LDL to dissociate from its receptor; additionally, the endosome fuses with a lysosome. LDL should be dissociated from its receptor since it is going to be degraded in the following step.

4) The LDL particle is degraded by the lysosome. This takes place after endocytosis, when LDL particles are transported into lysosomes once they are fused, cleaving the cholesterol esters into cholesterol and fatty acids.

6 0
3 years ago
Twin studies document similarities and differences between twins. When two _____ twins raised under very ______ circumstances di
Aneli [31]

Answer:

Twin studies document similarities and differences between twins. When two IDENTICAL twins raised under very DIFFERENT circumstances display similar personality traits, that suggests a strong GENETIC influence on personality. Critics of twin studies suggest that some documented similarities between twins are based on the fact that the twins are still the same age and may have some SIMILARITIES because of it.

Explanation:

It is not fully proved the genetic influence on the personality, and it is not the only factor wich modify the conduct.

It is stated that the personality is the result of a combination of different stimulus as genetic, socio-economic environment, parental education, upbringing rules, etc. Even the personal health can modify the personality.

3 0
3 years ago
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wolverine [178]
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8 0
4 years ago
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LekaFEV [45]

Answer:

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8 0
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D

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4 0
3 years ago
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