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Questions Related to evs

Acromion process is found in 

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Coxal bone

  2. Scapula

  3. Sternum

  4. Clavicle

Show answer
Correct Option: B
Explanation:

The acromial vein is actually a part of a greater network of veins located in the shoulder, near the acromion process in the scapula (shoulder blade). So the correct option is ' Scapula'.

Find the incorrect answer from the following?

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Veins are typically larger in diameter than arteries

  2. Because of their small size,capillaries contain blood that is moving more quickly than in other parts of the circulatory system

  3. The walls of arteries are elastic,enabling them to stretch and shrink during changes in blood pressure

  4. Veins contain more blood than any other part of the circulatory system

Show answer
Correct Option: B
Explanation:

As blood is pumped by the heart directly into the aorta, the blood travels at 30 cm/sec. From the aorta, blood flows into the arteries and arterioles and, ultimately, to the capillary beds. As it reaches the capillary beds, the rate of flow is dramatically (one-thousand times) slower than the rate of flow in the aorta. 

So, the correct option is 'Because of their small size, capillaries contain blood that is moving more quickly than in other parts of the circulatory system'.

Pulmonary artery differs from pulmonary vein in having

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Thick wall

  2. Thin wall

  3. Valves

  4. Both (B) and (C)

Show answer
Correct Option: D
Explanation:

The blood in the pulmonary artery is under less pressure since it is only being pumped a short distance to the lungs and so does not need a thick wall. The aorta (which transports the blood over greater distances) receives blood under greater pressure from the powerful left ventricle and so needs a thicker wall. The pulmonary valve (pulmonic valve) is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery. Valves are used to prevent backflow of blood. The pulmonary vein carries oxygenated blood from the lungs to the left side of the heart, from the pulmonary circulation. The heart contraction is enough to keep the blood flowing as the distance between the lungs and back to the heart is minimal compared to the systemic circulation. So, the pressure of the heart exerting is enough to keep the blood in one direction.

Select the incorrect statements.
A. Arteries have thick elastic walls and veins have valves.
B. Capillaries are the smallest blood vessels supplying the tissues.
C. AV node is known as the pace setter of the heart.
D. Arteries carry blood towards the heart and veins carry blood away from the heart to different organs.

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. A and B

  2. A and C

  3. C and D

  4. D only

Show answer
Correct Option: D
Explanation:

Arteries are blood vessels that carry blood away from the heart. While most arteries carry oxygenated blood, there are two exceptions to this, the pulmonary and the umbilical arteries. All veins carry blood towards the heart. 

Therefore, the correct answer is option D.

Artery supplying blood to pericardium is

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Brachial artery

  2. Vertebel artery

  3. Coronary artery

  4. Internal mammary artery.

Show answer
Correct Option: C
Explanation:

Visceral pericardium receives blood from coronary artery while parietal and fibrous pericardium get blood supply from internal thoracic (mammary artery).

Choose the correct answer from the alternatives given.
An artery is a vessel that carries:

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. blood away from the heart

  2. blood towards the heart

  3. oxygenated blood

  4. deoxygenated blood

Show answer
Correct Option: A
Explanation:
  • An artery is a vessel which is thick walled, carries oxygenated blood (except pulmonary artery) away from the heart.
  • While veins are thin-walled, carry deoxygenated blood (except pulmonary vein) towards the heart.
So, the correct option is 'Blood away from the heart'.

Choose the correct answer from the alternatives given.
Systole refers to the contraction of:

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. major arteries

  2. SA node

  3. atria and ventricles

  4. all of these

Show answer
Correct Option: C
Explanation:

The systole is the rhythmic contraction of the chambers of the heart (Atria and Ventricles) and diastole is the rhythmic relaxation of the chambers of the heart. The events occurring during one heartbeat is known as the cardiac cycle. During this cycle, the auricles and the ventricles of the heart rhythmically contract and relax.

So, the correct option is 'Atria and ventricles'.

Choose the correct answer from the alternatives given.
The only artery which carries deoxygenated blood is the:

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. pulmonary artery

  2. renal artery

  3. coronary artery

  4. carotid artery

Show answer
Correct Option: A
Explanation:

Pulmonary artery and the Pulmonary vein are a set of blood vessels that are related to the lungs. The Pulmonary artery carries deoxygenated blood from the right ventricle to the lungs for oxygenation, this oxygenated blood is carried back to the heart by the Pulmonary vein for systemic circulation i.e. for ​circulation to different parts of the body.

So, the correct option is 'Pulmonary artery'.

Choose the correct answer from the alternatives given.
A vein differs from an artery in having

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. strong muscular walls

  2. valves to control the direction of flow of blood towards the heart

  3. valves to control the direction of flow of blood opposite to the heart

  4. narrow lumen

Show answer
Correct Option: B
Explanation:

Veins are less muscular than arteries, contain valves to help keep blood flowing in the right direction, towards the heart. They carry deoxygenated blood from tissues back to the heart. 

So, the correct option is 'valves to control the direction of flow of blood towards the heart'.

Choose the correct answer from the alternatives given.
Water enters capillaries on the venule side as a result of:

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. higher red blood cell concentration on this side

  2. increased blood pressure on this side

  3. an osmotic pressure gradient

  4. active transport from tissue fluid

Show answer
Correct Option: C
Explanation:

  • Materials, including oxygen, carbon dioxide, amino acids, sugars, and water, are exchanged between the blood and tissue fluid within blood vessels known as capillaries.
  • Blood pressure and osmotic pressure control the pressure in a capillary. Blood pressure, caused by the heart’s beating, is higher at the arterial end of the capillary and causes water to exit at that point.
  • On the other hand, blood pressure is weak by the time blood reaches the venous end of the capillary, and osmotic pressure becomes higher, causing water to enter at that end.
So, the correct option is 'An osmotic pressure gradient'.