HomeMock TestState PCSSSCHSSCDSSSBRO/ARO

Human Anatomy and Physiology : V. Circulatory System Part-I

📆 October 28, 2024

Total Questions: 40

21. Read the following statements in connection with red blood corpuscles and with the help, the code given below find out the correct answer? [U.P.U.D.A./L.D.A. (Pre) 2001, U.P.P.C.S. (Pre) 2001, U.P.P.C.S. (Spl.) (Mains) 2004, U.P.P.C.S. (Pre) 2005]

 

  1. They have iron
  2. They provide red colour to the blood
  3. They provide immunity against certain diseases
  4. They are the carrier of oxygen in the blood

Code:

Correct Answer: (c) 1, 2 and 4
Solution:Red blood cells (RBCs) or red blood corpuscles also called erythrocytes are the most common type of blood cell and the vertebrate organism's principal means of delivering oxygen (O₂) to the body tissues via blood flow through the circulatory system. RBCs take up oxygen in the lungs or gills and release it into tissues while squeezing through the body's capillaries. The cytoplasm of erythrocytes is rich in haemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red colour of the cells.

22. Consider the following statements about haemoglobin : [U.P. P.C.S. (Pre) 2016]

  1. It carries oxygen in the blood.
  2. It is iron-containing compound.
  3. It provides immunity against certain diseases.
  4. It imparts a red colour to the blood.

The correct statements out of these are :

Correct Answer: (d) 1, 2 and 4
Solution:Red blood cells (RBCs) or red blood corpuscles also called erythrocytes are the most common type of blood cell and the vertebrate organism's principal means of delivering oxygen (O₂) to the body tissues via blood flow through the circulatory system. RBCs take up oxygen in the lungs or gills and release it into tissues while squeezing through the body's capillaries. The cytoplasm of erythrocytes is rich in haemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red colour of the cells.

23. The function of haemoglobin in body is [Uttarakhand P.C.S. (Pre) 2006]

Correct Answer: (a) Transport of Oxygen
Solution:Red blood cells (RBCs) or red blood corpuscles also called erythrocytes are the most common type of blood cell and the vertebrate organism's principal means of delivering oxygen (O₂) to the body tissues via blood flow through the circulatory system. RBCs take up oxygen in the lungs or gills and release it into tissues while squeezing through the body's capillaries. The cytoplasm of erythrocytes is rich in haemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red colour of the cells.

24. Which of the following natural substances contains iron (Fe)? [U.P. P.C.S. (Pre) 2020]

Correct Answer: (d) Myoglobin
Solution:Myoglobin (Mb) is an oxygen-binding heme protein found in the skeletal muscle tissue of vertebrates in general and in almost all mammals. It contains iron (Fe). It is distantly related to haemoglobin. Compared to haemoglobin, myoglobin has a higher affinity for oxygen and does not have cooperative binding with oxygen like haemoglobin does.

25. Myoglobin contains the metal— [47th B.P.S.C. (Pre) 2005]

Correct Answer: (d) Iron
Solution:Myoglobin (Mb) is an oxygen-binding heme protein found in the skeletal muscle tissue of vertebrates in general and in almost all mammals. It contains iron (Fe). It is distantly related to haemoglobin. Compared to haemoglobin, myoglobin has a higher affinity for oxygen and does not have cooperative binding with oxygen like haemoglobin does.

26. In which of the following creatures haemoglobin is dissolved in the plasma— [L.A.S. (Pre) 1994]

Correct Answer: (d) Earthworm
Solution:

An earthworm is one of the animals that are classified in the Annelida phylum. In an earthworm, haemoglobin is dissolved in the plasma. The earthworm has a closed circulatory system in which blood is confined to blood vessels which re-circulates again and again to get maximum use of it.

27. Due to which the blood has red colour: [U.P.P.C.S. (Pre) 1990]

Correct Answer: (b) Haemoglobin
Solution:The red colour of red blood cells in the blood is due to the combining of a protein known as haemoglobin with oxygen. Red blood cells are also called erythrocytes which are found only in the blood of vertebrates. There is no nucleus inside the red blood cells. Haemoglobin binds to oxygen molecules in the lungs, and then releases the oxygen into the body's tissues as needed for cellular respiration. Haemoglobin also carries a portion of the carbon dioxide produced by tissues back to the lungs for exhalation. Haemoglobin is a key component of red blood cells (erythrocytes). Haemoglobin contains iron-containing heme groups that bind to oxygen and carbon dioxide, according to the National Institutes of Health (NIH).Haemoglobin is a complex protein with four globin subunits, each carrying a heme group, says the National Institutes of Health (NIH).

28. Red blood corpuscles (RBCs) has colour due to: [Uttarakhand U.D.A./L.D.A. (Pre) 2003]

Correct Answer: (d) Haemoglobin
Solution:The red colour of red blood cells in the blood is due to the combining of a protein known as haemoglobin with oxygen. Red blood cells are also called erythrocytes which are found only in the blood of vertebrates. There is no nucleus inside the red blood cells. Haemoglobin binds to oxygen molecules in the lungs, and then releases the oxygen into the body's tissues as needed for cellular respiration. Haemoglobin also carries a portion of the carbon dioxide produced by tissues back to the lungs for exhalation. Haemoglobin is a key component of red blood cells (erythrocytes). Haemoglobin contains iron-containing heme groups that bind to oxygen and carbon dioxide, according to the National Institutes of Health (NIH).Haemoglobin is a complex protein with four globin subunits, each carrying a heme group, says the National Institutes of Health (NIH).

29. What function does blood perform in the body? [M.P.P.C.S. (Pre) 2010]

Correct Answer: (a) Takes oxygen to all parts
Solution:

Blood performs many important functions within the body including supply of oxygen to tissues (bound to haemoglobin, which is carried in red cells) and the supply of nutrients such as glucose, amino acids and fatty acids (dissolved in the blood or bound to plasma protein).

30. Average blood pressure of a human is – [U.P.P.C.S. (Pre) 1993]

Correct Answer: (d) 120/80
Solution:The normal average blood pressure of human is 120/80 mm Hg. This means that systolic pressure around 120mm Hg and diastolic pressure should be around 80 mm Hg.
  • Systolic pressure:
    This is the peak pressure in your arteries when your heart beats and pumps blood into them.
  • Diastolic pressure:
    This is the pressure in your arteries when your heart is at rest between beats.
  • Normal blood pressure:
    For most adults, a blood pressure reading less than 120/80 mmHg is considered normal.
  • Elevated blood pressure:
    A systolic pressure between 120 and 129 mmHg, with a diastolic pressure less than 80 mmHg, is considered elevated.
  • Hypertension (high blood pressure):
    Hypertension is diagnosed when blood pressure consistently measures 130/80 mmHg or higher.
Home  | Mock Test  | State PCS  | SSC  | HSSC  | DSSSB  | RO/ARO  | 
© 2024 Mock Test 365 | All Rights Reserved