Answer and Explanation:
During the body's metabolism, molecules are generated that are residues of chemical and methanbological reactions. These molecules need to be removed from the body and this process is done by the excretory system. Most of these molecules are wastewater and nitrogen compounds.
The kidneys are a very important point in this system, along with the urinary system. When blood, rich in oxygen, comes in contact with the kidneys, they are filtered by this organ. This is done through structures called the nephron which are the excretory unit of the kidneys. Within each nephron there is a collecting capsule where water and residual particles that are in the blood are captured, while the rest of the particles pass along with the blood and continue on their way to other regions of the body.
From inside the kidneys there is also a tube called the ureters, which captures the water and molecules captured by the nephron (which forms the urine) and takes them to the bladder, which directs the urine out of the body through the urethra.
Answer:
20.9 percent
Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.
Explanation:
20.9 percent
Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.
Hope this helps.
Answer: Sunk Cost fallacy
Explanation:
The sunk cost can be defined as the cost that has already been incurred and cannot be refunded back. It is in contrasted to the prospective costs which are the costs of future and that can be saved if any action is needed.
The economist argue that the sunk cost has nothing to do with the future rational decision making.
The example of such situation is fees which is once spent is generally not refunded.
The correct answer would be, Social Barriers.
Raj's friends are trying to get him to smoke cigarettes. Raj knows how bad smoking would be for his health. So Raj is facing the social barrier in this situation.
Explanation:
When there is an influence on a person from external environment which restricts him in completing his goal, this is called as the Social Barrier. In simple words, it is a barrier which makes a person do something which he doesn't want to do, or restricts him from doing what he wants to do.
In the given example, Raj's does not want to smoke but his friends, which are the external factors, are influencing him to smoke cigarette. Raj in influenced to do something which he doesn't want to do due to social barriers, his friends.
Similarly, there can be an example in which a person thinks that woman drive safer than men, but because of the stereotype that women are bad drivers, the person's opinion may change. Here the stereotype will act as the external factor, which influenced the person's own thinking.
Learn more about Social Barriers at:
brainly.com/question/13590341
#LearnWithBrainly
