Deoxygenated blood from your body reaches your heart by what two major veins

What is the answers plz

notka56 [123]

Answer:

4. The formation and evolutuion of stars and galaxies

7 0

4 years ago

Modern scientists continue the tradition of the Greek philosophers in their efforts to understand the world around them. They kn

ddd [48]

Answer:

From Thales, who is often considered the first Western philosopher, to the Stoics and Skeptics, ancient Greek philosophy opened the doors to a particular way of thinking that provided the roots for the Western intellectual tradition. Here, there is often an explicit preference for the life of reason and rational thought. We find proto-scientific explanations of the natural world in the Milesian thinkers, and we hear Democritus posit atoms—indivisible and invisible units—as the basic stuff of all matter. With Socrates comes a sustained inquiry into ethical matters—an orientation towards human living and the best life for human beings. With Plato comes one of the most creative and flexible ways of doing philosophy, which some have since attempted to imitate by writing philosophical dialogues covering topics still of interest today in ethics, political thought, metaphysics, and epistemology. Plato’s student, Aristotle, was one of the most prolific of ancient authors. He wrote treatises on each of these topics, as well as on the investigation of the natural world, including the composition of animals. The Hellenists—Epicurus, the Cynics, the Stoics, and the Skeptics—developed schools or movements devoted to distinct philosophical lifestyles, each with reason at its foundation.

With this preference for reason came a critique of traditional ways of living, believing, and thinking, which sometimes caused political trouble for the philosophers themselves. Xenophanes directly challenged the traditional anthropomorphic depiction of the gods, and Socrates was put to death for allegedly inventing new gods and not believing in the gods mandated by the city of Athens. After the fall of Alexander the Great, and because of Aristotle’s ties with Alexander and his court, Aristotle escaped the same fate as Socrates by fleeing Athens. Epicurus, like Xenophanes, claimed that the mass of people is impious, since the people conceive of the gods as little more than superhumans, even though human characteristics cannot appropriately be ascribed to the gods. In short, not only did ancient Greek philosophy pave the way for the Western intellectual tradition, including modern science, but it also shook cultural foundations in its own time.

Explanation:

3 0

3 years ago

What are some fun facts on animal and plant cells.

ArbitrLikvidat [17]

Animal cells:
They are self sufficient, because of Nano-Chemical factories, so they can make their own stuff like cell membranes.
A cell can destroy itself through apoptosis in the event that it is irreparable.

Plant cells:
These were the first type of cells discovered by us.
Plants only actually use about 1/6 of the energy they get from photosynthesis, the rest is stored for animals that eat the plant.

6 0

3 years ago

What affect does binding a gas to a hemoglobin have on homeostasis

frutty [35]

Explanation:

Haemoglobin acts as a protein buffer.

Haemoglobin- oxygen binding in the blood is part of acid-base homeostasis. The cells within the brain or CNS ensure that more oxygen is taken into the lungs at a faster rate while carbon dioxide is removed; this aids in gaseous exchange and maintaining the pH of the blood- oxygen concentrations are kept high within the blood stream as blood circulates through the body.

Blood pH levels are typically within 7.35 --7.45. it is regulated by coordinated activity controlled by the brain, and carried out by the kidneys and lungs; along with red blood cells. When the body needs more oxygen, CO2 (as waste from cellular respiration), in the blood is converted to biarbonate increasing acidity; at the same time, H released in the reaction, and buffered by haemoglobin.

-The haemoglobin undergoes reduction by oxygen, and the pH level is maintained.

Further Explanation:

A typical oxygen disassociation curve shows haemoglobin’s percentage saturation at different oxygen concentrations (partial pressures). This shows the equilibrium between oxyhaemoglobin (haemoglobin in its oxygen bound state and haemoglobin (free of oxygen molecules). The saturation generally increases with increased partial pressures of oxygen.

Haemoglobin is an oxygen binding protein comprising four iron-based peptide subunits: two α subunits and two β subunits. Each molecule of haemoglobin has the ability to bind up to four oxygen molecules at a time; this occurs via cooperative binding- meaning that with increased haemoglobin- oxygen binding at the protein haemoglobin’s subunits,(where oxygen is a ligand) there is an increase in its affinity for oxygen.

This is because there is a conformational change in the hemoglobin molecule due to the altered orientation of the protein’s secondary structures, making it easier for a second molecule of oxygen to successively followed by more O2-Haem binding until the molecule is saturated- at this point the curve plateaus- it reached its carrying limit.

Hormones bind to chemical receptors in order to cause specific changes in target cells, these lead to changes in the body's internal environment called homeostasis. It includes the thyroid, parathyroid, pituitary, pineal and adrenal glands along with other regions.

Learn more about hemoglobin at brainly.com/question/5866353

Learn more about the circulatory system at brainly.com/question/10083364

Learn more about homeostasis at brainly.com/question/1601808

#LearnWithBrainly

5 0

3 years ago

Please solve fast in 5 min

Oksi-84 [34.3K]

Answer:

(C)

Explanation:

answer"A" can be cancelled as prokaryotic cells don't possess a nucleus.

answer"B" can be cancelled as animal cells don't have cell walls.

answer"D" can be cancelled if you know the cell theory.

6 0

3 years ago

Deoxygenated blood from your body reaches your heart by what two major veins​

Deoxygenated blood from your body reaches your heart by what two major veins