Human Physiology Lecture Notes

Difference between Rod Cells and Cone Cells (Comparison Table)


Rod cells vs cone cells

Rod cells vs Cone Cells
Similarities and Differences between Rod Cells and Cone Cells

Rod cells and Cone cells are the two types of photoreceptor cells found in the retina of eyes. These cells are capable of absorbing light and converting the light into signals that can trigger a change in the membrane potential, which results in visual phototransduction. In other words, these cells assist in vision in presence of light.

Rod cells: A type of photoreceptor cells in the eye found concentrated at the outer edges of the retina. Rod cells are responsible for vision in low light conditions.

Cone cells: The second type of photoreceptor cell in the eye concentrated in the fovea of the retina. Cone cells are responsible for the vision in bright light and colour vision.

rod vs cone cells

image source: wikipedia

The present post explains the similarities and differences between Rod cells and Cone cells with a comparison table.

Similarities between Rods and Cones

Ø  Both rods and cones are photoreceptor cells of the eye.

Ø  Both can absorb photon (light)

Ø  Both cells possess photoreceptor proteins to absorb the photons (light).

Ø  Both are modified nerve cells.

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Human Physiology Lecture Notes

Difference between Tendons and Ligaments: Comparison Table


Tendon vs Ligament

Tendons vs Ligaments
(Similarities and Differences between Tendons and Ligaments)

Tendons and Ligaments are connective tissues* belong to the category of ‘Dense Granular Connective Tissues’. They are the essential component for the proper functioning of the skeletal and muscular system.

Tendons: Tendons are cord-like, strong, inelastic structures that join skeletal muscles to bones.

Ligaments: Ligaments are elastic structures which connect bones to bones in joints.

what is Tendon

image source: wikipedia

Similarities between Tendons and Ligaments

Ø  Both tendons and ligaments are connective tissues.

Ø  Both are dense-granular connective tissues.

Ø  Both composed of living cells.

Ø  Both contain plenty of collagens.

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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

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Human Physiology Lecture Notes

Difference between Blood Plasma and Serum


Difference between Serum and Plasma

Blood Plasma vs Blood Serum
(Similarities and Differences between Blood Serum and Plasma)

Blood is a body fluid composed of blood cells suspended in the blood plasma. Blood facilitate the transport of oxygen, carbon dioxide, nutrients and hormones in the body. The terms ‘Blood Plasma’ and ‘Blood Serum’ are synonymously used. In fact, they are two different components of the blood. The blood chiefly composed of three main components; they are serum, plasma and blood corpuscles (RBC and WBC).

Serum: Serum is the liquid part of blood (plasma) without the clotting factors (fibrinogen). Serum = plasma – clotting factors

Plasma: Plasma is the medium of blood in which the blood cells (RBC and WBC) and other components of the blood are suspended. The plasma composed of serum and clotting factor.

The present post discuss the Similarities and Differences between Blood Serum and Plasma

Similarities between Serum and Plasma

Ø  Both serum and plasma are the components of blood.

Ø  Both serum and plasma are used for blood testing for diagnostic purpose.

Ø  Both are the fluid component of blood.

Ø  The composition plasma and serum is more or less similar.

Ø  Both contain hormones, glucose and electrolytes.

Ø  Both contain antigens and antibodies.

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