Question

No explanation pls just the right ans

Contraction of the right ventricle pumps blood to the ...... via ........

body, aorta

pulmonary veins, lungs

lungs, pulmonary arteries

pulmonary arteries, body

......... is a force exerted in all directions, including against the walls of blood vessels

blood flow velocity

lub-dup sound

stroke volume

blood pressure

Arteries and veins are distinguished from each other by .......

CO2

O2 content

direction of O2 flow

direction of blood flow

Which of the following cells contain iron-containing protein that transports O2?

white blood cells and red blood cells

thrombocyte

leukocyte

erythrocyte

Urine produced is .......... to the interstitial fluid in any organ other than kidney

hypoosmotic

isoosmotic

hyperosmotic

both isoosmotic and hyperosmotic

All blood vessels contain a central lumen lined with an ....... layer that lines blood vessels

connective

muscular

nervous

epithelial

Answer 1

1. The contraction of the right ventricle pumps blood to the lungs via pulmonary arteries.

The heart is composed of four chambers which include two auricles and two ventricles. It is the right ventricle that receives deoxygenated blood from the body and pumps it to the lungs via the pulmonary artery through the contraction. The pulmonary veins carry oxygenated blood (an exception to the vein).

2. Blood pressure is a force exerted in all directions, including against the walls of blood vessels.

The blood pressure is defined as the force which blood imposed against the walls of the blood vessel when it moves through the vessel. The blood flow velocity is the rate at which blood flows through the vessel and it varies depending upon the blood vessel area and inversely proportional to it. The lub dub sound is the sound of the heart which is generated as a result of heartbeat and blood flow. Stroke volume is the volume of blood that is pumped by the left ventricle during heart pumping.

3. The arteries and veins are distinguished from each other by the direction of blood flow.

The arteries are known to carry oxygenated blood and veins to carry deoxygenated blood with few exceptions. But it is the blood flow direction that distinguished them from each other. The arteries carry blood out from the heart and veins carry blood to the heart. Veins carry deoxygenated blood but some amount of oxygen is still present in the blood they carry although its concentration is very less.

4. Erythrocytes, red blood cells contain iron-containing proteins that transport O2.

The erythrocytes contain hemoglobin protein which is an iron-containing protein and carry oxygen throughout the body. Leucocytes are white blood cells that are involved in the immune response. Thrombocytes are platelets that are part of the blood coagulation process upon injury.

5. Urine produced is hyperosmotic to the interstitial fluid produced by any organ other than the kidney.

Urine waste products produced by the kidney by removal of waste products from the body which includes nitrogenous waste, minerals. In urine concentration of solute is more than interstitial fluid (the fluid which surrounds the cells in tissues). A solution is hyperosmotic which has more solute concentration and higher osmotic pressure compared to the other fluid. A hypoosmotic solution has lower solute concentration than other solutions. A solution is called isoosmotic when both solutions have the same concentration of water molecules.

6. All blood vessels contain a central lumen lined with a connective layer that lines the blood vessels.

The arteries are composed of three-layer and the innermost layer is surrounded by a layer of connective tissue. The muscular layer is a part of the muscles and the nervous system is consists of nerve cells. The epithelial layer is present in the digestive tracts, respiratory system, etc. It forms the outer surface of blood vessels.