Viruses are not always classified as living cells because they cannot live independently. They rely on a host to provide all resources to live, without a host they are in a dormant, near dead like state. Therefore it has to define a virus as dead or alive as it may or may not have a host.
Answer:
Cartilage rings of trachea have protective role
Explanation:
Trachea is a tube, part of the respiratory system, which allows the passage of the air: from larynx to lungs (primary bronchi). It is enveloped with cartilage rings that prevent collapse of the trachea when there is no air. The cartilage "rings" are C-shaped, except one full ring-shaped - the cricoid cartilage which attaches trachea to the larynx.
idgis primarily found on the surface of B lymphocytes where it functions as a receptor for antigen.
img antibodies are found in blood and lymph fluid and are the first type of antibody made in response to an infection. They also cause other immune system cells to destroy foreign substances.
Answer:
The chief force pushing water and solutes out of the blood across the filtration membrane is the glomerular hydrostatic pressure (glomerular blood pressure).
Explanation:
The Glomerular hydrostatic pressure, is part of the Glomerular filtration forces which are part of the urine system. We are considering here how the blood is filtrated, and this is the main function of the glomerulus. This glomerular hydristatic pressure is the pressure exerted by fluid on the capillary walls of the glomerulus or the walls of the Bowman's capsule.
