Question

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1.Why does the body need hemoglobin? Which cells contain hemoglobin? What element must be present for hemoglobin to perform its main function?

2 Mature erythrocytes do not contain a nucleus. Why is this advantageous?

3. Describe the process of agglutination.

Answer 1

1) THE question is why does body need hemoglobin and which cells contain hemoglobin and what element must be present for hemoglobin to perform its main function.

Answer: As human body relays on oxygen for its survival and performing various metabolic functions ,it needs a protein which is capable of delivering the inhalled oxygen to tissues and cells of the body.This protein is called HEMOGLOBIN. Its main requirements is to carry and supply oxygen from lungs to various tissues and organs in body and transport the carbon dioxide from tissues to lungs.

~ERYTHROCYTES(RED BLOOD CELLS) IN OUR BODY CONTAIN HEMOGLOBIN .

~For hemoglobin to perform its functions it needs a metal i.e Fe (iron) .It requires iron to perform its functions .i.e heme group which holds and supply oxygen to cells and tissues and also to carry carbon dioxide from cells and tissues to lungs.

hemoglobin contains two parts i.e heme and globin

heme contains iron which holds oxygen in RBC and globin maintain fluidity of the red blood cells.

2)Mature erythrocytes do not contain nucleus this is an adaptation

by erythrocytes to increase their flexibility in carrying oxygen i.e more oxygen to cells by absence of a nucleus and increased hemoglobin sacs with more hemoglobin content in each erythrocytic cell .This helps each erythrocytic cell to hold more oxygen .

but due to absence of nucleus they cannot divide and repair themselves with only life span of 120 days.

3) Agglutination is the process that occurs when an antigen (agglutinogen)interacts with corresponding antibody (agglutinin) which results in a visible clumping.

process

​​​​​​It involves two process

a)sensitization.

​​​​​b) lattice formation.

sensitization it involves interaction of one antibody with antigenic determinant on the antigen.

lattice formation involves agglutination of sensitized RBC which results in clump formation.

A number of factors determine the process of agglutination

i.e the size of antibody ,antigen - antibody concentration, number of antigenic sites on RBC etc.