Human Physiology Lecture Notes

Difference between Osteoblast and Osteoclast: Comparison Table


Compare Osteoblast and Osteoclast

Osteoblast vs Osteoclast
(Similarities and Differences between Osteoblast and Osteoclast)

Osteoblasts and Osteoclasts are the two types of bone cells which constitute the bone tissue or the osseous tissue. The bone is a metabolically active tissue consisting of several types of cells among which the Osteoblasts and Osteoclasts are the most important ones. Osteoblasts are responsible for the formation of bone whereas the osteoclasts are responsible for the breakdown of the bones. The coordinated actions of these two cells are required for the formation and resorption (breakdown) of bones. This coordinated action between osteoblasts and osteoclasts is known as Bone Remodeling. Bone remodeling also ensures the maintenance of bones and the regulation of mineral levels, particularly calcium and phosphorous, in the body.

Similarities between Osteoblasts and Osteoclasts

Ø  Both osteoblasts and osteoclasts are bone cells.

Ø  Both are involved in bone remodeling.

Ø  Both are involved in the repair of bones.

Ø  Both are living cells with nucleus.

Ø  Both are metabolically very active cells.

Ø  Both cells are located on the surface of osteon seam.

Ø  Both are connective tissues.

Bone Remodeling

image source: wikipedia

Continue reading

Human Physiology Lecture Notes

Difference between Compact and Spongy Bone: Comparison Table


Compare Compact and Spongy Bone

Compact Bone vs Spongy Bone
(Similarities and Differences between Compact Bone and Spongy Bone)

Bones are the primary structure of vertebrate skeleton system which provides shape to the body and supports the muscles. Apart from this, the bone also produces the blood tissue. Based on the nature of bone-matrix, the skeletal bones are classified into two categories – (1) Compact bones and (2) Spongy bones.

(1) Compact bone: They are tough and heavy bones made of compactly packed osteons. They form the shaft or diaphysis of long bones.

(2) Spongy bone: They are soft and light bones make up of loosely packed trabeculae. They form the epiphyses (bond ends) of long bones.




Similarities between Compact bone and Spongy bone

@. Both compact bone and spongy bones are structural bones.

@. Both are the components of the skeletal system of an organism.

@. Both provide shape and structure to the organism.

@. Both are osseous tissues.

@. Both support the functioning of muscles.

Compact vs Spongy Bone

image source: wikipedia

Continue reading

Difference between True Solution, Colloidal Solution and Suspension: A Comparison Table


True Solution vs Colloids vs Suspension

True Solution vs Colloidal Solution vs Suspension
(Similarities and Differences between True Solution, Colloidal Solution and Suspension)

Based on the nature of particle size, solutions are classified into THREE categories, namely (1) True Solution, (2) Colloidal Solution and (3) Suspension. Apart from the size differences of particles, these sub-categories of solutions also show considerable difference in their nature, colour, filterability and appearance.

(1). True Solution: a mixture of two or more substances in which the solute is completely dissolve in the solvent. The size of particles in a true solution will be less than 1 nm in diameter.

(2). Colloidal Solution: a heterogenous mixture of two or more substances in which the substance is evenly suspended in the other. The size of particles in a colloidal solution will be larger than that of a true solution and smaller than suspension. The size range of particles in a colloidal solution will be 1 – 1000 nm in diameter.

(3). Suspension: The size of particles in a suspension will be greater than 1000 nm. Suspension is a heterogenous mixture of two or more substances.

The present post describes the Similarities and Differences between True Solution, Colloidal Solution and Suspension with a Comparison Table.

Continue reading

questions and answers Biology

Kerala PSC HSST Botany 2017 Original Question Paper- Download PDF


Botany HSST PSC Question Paper

Kerala PSC HSST Botany 2017 Examination
Higher Secondary School Teacher: Junior & Senior

Question Paper Code 45/2017/OL

Original question paper of Kerala PSC HSST Botany Junior / Senior (Higher Secondary School Teacher Botany) examination conducted by Kerala PSC (Public Service Commission) (Q. Code 45/2017/OL) on 05/06/2017 for the appointment of HSST (Higher Secondary School Teacher) in Botany in Government Higher Secondary Schools of Kerala under the Directorate of Higher Secondary Education, Trivandrum, Govt. of Kerala. Questions are in MCQ (Multiple Choice Questions) format.

Please wait few seconds to load the PDF preview…

Continue reading

Difference between Covalent Bond and Metallic Bond: Comparison Table


Covalent vs Metallic Bonds

Covalent Bonds vs Metallic Bonds
(Similarities and Differences between Covalent Bonds and Ionic Bonds)

The chemical bonds are stable attractions between atoms, ions or molecules. The formation of chemical bond allows the formation of molecules or compounds. Chemical bonds are classified into different categories based on their formation and strength. Important types of chemical bonds recognized are Covalent bonds, Ionic bonds, Metallic bonds, Dipole-dipole interactions, London dispersion forces and Hydrogen bonds. The present post discuss about the Similarities and Differences between the Covalent bond and Metallic bond with a Comparison Table.

Covalent bond: A chemical bond formed by the sharing of electron pairs.

Metallic bond: Bonds occurs in metals, formed by the electrostatic attractive force between delocalized electrons and positively charged metal ions.

Similarities between Covalent Bond and Metallic Bond

Ø  Both covalent and metallic bonds are strong bonds.

Ø  Both are primary bonds.

Ø  Both bonds result in the formation of complex structures.

Ø  The formation of both covalent and metallic bond results in the formation of more stable compounds than the original.

Ø   Compounds with covalent and metallic bonds are insoluble in polar solvents.

Continue reading