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morpeh [17]
3 years ago
6

Why are ecosystems not considered “closed” systems?

Biology
1 answer:
geniusboy [140]3 years ago
7 0
In a closed ecological system, any waste products produced by one species must be used by at least one other species. If the purpose is to maintain a life form, such as a mouse or a human, waste products such as carbon dioxide, feces and urine must eventually be converted into oxygen, food, and water.
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Enzymes in the _________ are primarily responsible for the metabolism of a drug.
GrogVix [38]

Enzymes in the liver cells <span>but are also located in cells throughout the body or also known as Cytochrome P450 (CYP450) are endogenous proteins in individuals that act as drug metabolizing enzymes and also have endogenous enzymatic processes that are also used to make cholesterol, steroids and other important lipids such as prostacyclins and thromboxane A2 (metabolites of arachidonic acid).</span>

4 0
3 years ago
For each of the following structures, first indicate its function in the fetus; then, note its fate (what happens to it or what
natita [175]

Answer:

1. Functions:

a. Umbilical artery >> carries deoxygenated blood from the fetus to the placenta

b. Umbilical vein >> transports oxygenated blood from the placenta to the fetus

c. <em>Ductus venosus</em> >> allows oxygenated blood from the placenta to bypass the liver

d. <em>Ductus arterious</em> >> allows most of the blood from the right ventricle to bypass the fetus's non-functioning lungs

e.<em> Foramen ovale</em> >> oxygenated blood from the umbilical vein to bypass the pulmonary circulation

2. After the bird:

1. Umbilical artery >> medial umbilical ligament

2. Umbilical vein >> round ligament of the liver

3. <em>Ductus venosus</em>  >> <em>ligamentum venosum</em>

4. <em>Ductus arteriosus</em> >> <em>ligamentum arteriosum</em>

5. <em>Foramen ovale</em> >> <em>fossa ovalis</em>

Explanation:

The umbilical artery is a paired artery localized in the abdominal and pelvic regions, which carries deoxygenated blood from the fetus to the placenta through the umbilical cord. The medial umbilical ligament is the obliterated part of the umbilical artery that arises from the internal iliac arteries. In utero, the umbilical arteries carry waste products back to the placenta, whereas the umbilical vein carries oxygenated blood from the placenta to the fetus. The round ligament of the liver (also known as <em>ligamentum teres hepatis</em>) is a remnant of the umbilical vein that  exists in the embryonic stage, it connects the left lobe of the liver to the umbilicus. The<em> ductus venosus</em> is a slender shunt that allows oxygenated blood from the placenta to bypass the liver, it connects the intra-hepatic portion of the umbilical vein to the inferior vena cava. The <em>ligamentum venosum</em> is an extrahepatic, slender, and fibrous remnant of the fetal ductus venosus that travels between the left portal vein and the inferior vena cava. The <em>ductus arteriosus</em> is a fetal artery that connects the aorta to the pulmonary artery. The <em>ligamentum arteriosum</em> is a nonfunctional vestige of the <em>ductus arteriosus, </em>it is attached to the superior surface of the pulmonary trunk. The <em>foramen ovale</em> is an oval-shaped, small, opening in the wall (<em>septum</em>) between the two upper chambers of the heart. The <em>fossa ovalis</em> is a vestige stricture of the foramen ovale of the embryonic heart, which forms a depression in the right atrium of the heart.

6 0
3 years ago
The amount of oxygen in Earth's atmosphere has been a constant for millions of years.
Radda [10]
True hope this helps
6 0
2 years ago
What is called as photosynthesis
dexar [7]

Explanation:

Any process by which plants and other photoautotrophs convert light energy into chemical energy is photosynthesis.

Hope it will help :)❤

5 0
3 years ago
Read 2 more answers
How can high levels of saturated fat and cholesterol in the diet affect a person's health?
hoa [83]
There are various diseases and disorders that could arise from high levels of saturated fat and specfically bad cholesterol. From the renowned, cardiac arrest, atherosclerosis,  hepatic steatosis, neurological diseases like cerebrovascular diseases; ischemia and hemorrhagic stroke, disoriented weight size and gain -obesity is also caused by the high concentrations of fat and bad cholesterol.
These disorders and complications are just the few of the many possible outcomes of the mentioned imbalance of fat. How? because there is too much lipid for the body to process and metabolize thus, breach of homeostasis.

6 0
3 years ago
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