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WITCHER [35]
3 years ago
5

Explain Gynecomastia in males.

Biology
1 answer:
PolarNik [594]3 years ago
8 0

Gynecomastia is an increase in the size of the mammary gland in men. The condition can occur in one or both breasts. It starts as a small mass under the nipple, which can be sensitive. One breast can be bigger than the other. Its cause is an imbalance between the stimulatory effects of estrogen (female sex hormones) and the inhibitory effects of androgens (male sex hormones) in the breast tissue, when the first ones increase, or the second ones descend.

Gynecomastia is a problem relatively common in the population, and there are three prevalence peaks throughout life:

Newborns: Between 60 and 90% of newborns have gynecomastia, produced by the passage of maternal estrogens through the placenta. It is a transient gynecomastia that disappears in about 2-3 weeks.

Puberty: Gynecomastia in puberty affects mainly young people aged between 10 and 14 years, and is due to the transient and physiological increase in estrogen that occurs at this age.

Elderly: Is due to an increase in fatty tissue with a greater peripheral aromatization ( a process that occurs in adipose tissue and that involves the conversion of androgens into estrogens), a decrease in the production of testosterone by the testes and the use of drugs.

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marysya [2.9K]

The properties are:-

1. Water is polar. Water molecules are polar, with partial positive charges on the hydrogens, a partial negative charge on the oxygen, and a bent overall structure. This is because oxygen is more electronegative, meaning that it is better than hydrogen at attracting electrons.

2. Water is an excellent solvent. Water has the unique ability to dissolve many polar and ionic substances. This is important to all living things because, as water travels through the water cycle, it takes many valuable nutrients along with it!

3. Water has high heat capacity. It takes a lot of energy to raise the temperature of a certain amount of water by a degree, so water helps with regulating temperature in the environment. For example, this property allows the temperature of water in a pond to stay relatively constant from day to night, regardless of the changing atmospheric temperature.

4. Water has high heat of vaporization. Humans (and other animals that sweat) use water’s high heat of vaporization to cool off. Water is converted from its liquid form to steam when the heat of vaporization is reached. Since sweat is made mostly of water, the evaporating water absorbs excess body heat, which is released into the atmosphere. This is known as evaporative cooling.

5 0
3 years ago
Only expressed when the dominant allele is not present
OverLord2011 [107]

the answer you are looking for is recessive gene

6 0
3 years ago
What is a trait that is ancestral to all chordates?
tester [92]
<span>chordates are the animals which are in phylum chordata and have backbone
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4 0
3 years ago
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Cardiovascular anatomy describe the operation of the heart and vessels. true\false​
mars1129 [50]

Explanation:

true

I hope this helps u

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3 0
3 years ago
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Which geochemical cycle is least likely to be affected by global warming?
Gemiola [76]

The geochemical cycle that is least likely to be affected by global warming is the water cycle, because even as temperatures increase, the evaporation cycle will remain the same.

<h3>How to describe the water cycle?</h3>

  1. at the beginning — liquid: water is present in the transpiration of living beings, in addition to rivers, lakes, oceans, etc.
  2. in the middle — gaseous: this water evaporates and accumulates, to later condense in the clouds
  3. at the end — liquid: the precipitation of water that returns to Earth in the form of rain occurs, restarting the cycle.

With this information, we can conclude that the water cycle, also known as the hydrological cycle, refers to the continuous movement that water makes through the physical environment and the living beings of the ecosystem, passing through the atmosphere, hydrosphere, lithosphere and biosphere.

Learn more about water cycle in brainly.com/question/1151425

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