Animal Tissue Test - 3

Variation in the shape of RBCs is called poikilocytosis. RBCs may change depending upon different pathological conditions.

Cartilages function as shock absorbents in vertebral column. The inter-vertebral discs are made up of white fibrous cartilage, which provides flexibility.

Oligodendrocytes wrap axons with myelin sheath within the central nervous system (brain and spinal cord).

The neuronal membrane is responsible for establishing an electrical potential inside the nerve cell and conducting an impulse.There is a high concentration of sodium ions present outside the neuron, and a high concentration of potassium ions inside. The neuronal membrane also contains specialised proteins called channels, which form pores in the membrane that are selectively permeable to particular ions.

Lacunae are the open spaces within the lamallae, which contain osteocytes. Osteocyte is a cell that lies within the substance of a fully formed bone.

The iliofemoral ligament is the strongest ligament in the body. It helps prevent extension of the femur when the body is standing erect.

Clara cells appear in the smallest bronchioles. They are the dome shaped, non-ciliated cells that secrete a lipoprotein material that reduces the surface tension in the airways to keep them open during the changes in the pressure of the respiratory cycle.

Cholesterol in the plasma comes from intestinal absorption of fats and synthesis in liver.

Yellow bone marrow gets its colour due to fat droplets present in it. Yellow bone marrow is responsible for synthesis of WBCs.

Periosteum is a tough membrane which covers the bone, but not the cartilage.