Answer:
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Carbon dioxide is transported in the blood from the tissue to the lungs in three ways:1 (i) dissolved in solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly haemoglobin. Approximately 75% of carbon dioxide is transport in the red blood cell and 25% in the plasma.
Answer:
Capillaries
Explanation:
In the circulatory sytem, the blood flow depends greatly on the blood vessels. As the blood flows through a vessel, it exerts a force against the walls of that vessel, and the measure of that force per unit area is defined as the blood pressure.
Like every other fluid, blood tends to flow from a high pressure region to a low pressure one. This means that when the blood ejects directly from the heart, in first instance it flows through the arteries, wich are the vessels with the highest pressure, then this arteries split into arterioles, where a drop in pressure occurs due to the smaller diameter that these vessels have, which at the same times generates more resistance to the blood flow and therefore a decrease in velocity and pressure. Then the arterioles split into the capillaries, which are the tiniest of all the blood vessels, meaning that they have the smallest diameter, therefore, a drop in pressure and velocity occurs once again when the blood reaches the capillaries. This decrease in velocity is very important because it allows for the exchange of nutrients and waste products between the capillaries and the cells.
Number 1
Explanation:
The first diagram represents the electron configuration of a carbon dioxide molecule.
Carbon dioxide as gaseous covalent molecule made up of two oxygen atoms and one central carbon atom:
CO₂
Carbon dioxide has linear structure with a bond angle of 180°.
In carbon dioxide, the atoms are covalent bonded.
The central atom is carbon and it joins up with two oxygen atoms.
The carbon has 4 valence electrons that goes into bonding in pairs. The oxygen atom has 6 valence electrons.
In order to complete their octet, they share their outermost electrons in the manner shown in the first diagram.
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Covalent bond brainly.com/question/5258547
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a) There are four kinds of coal depending on their carbon content. ⇒ False
b) Coal is usually found in liquid state. ⇒ False
c) Fossil fuels are the result of the descomposition of plants and animals from the past. ⇒ True
d) Petroleum is the cheapest source of energy.⇒ True
