40.As ser tion T
H^1
cells pro duce cytokines and are
as so ci ated with al ler gic re ac tions.
Reason T
H^2cells mostly activate cells related to
cellular immunity such as macrophages, CD-8,
T-cells, etc.
41.As ser tion Arteriosclerosis causes hypertension
or high blood pressure.
Rea son In arteriosclerosis a lumpy thickness
develops on the inner walls of the arteries thatprevents the dilation of vessels.
42.As ser tion Malignant Tertian malaria is caused
by Plasmodium ovale.
Reason In this type of malaria recurrence of
fever is after every 48 hours.43.As ser tion Tissue specific macrophages are
formed by the differentiation of monocytes.
Reason Macrophages of liver are known as
Kupffer cells.
44.As ser tion Caffeine provides a sense of
wellbeing, alertness, beats boredom, thinking
becomes clear and improves performance.Reason Caffeine is a CNS stimulant.
45.As ser tion Hay fever is a form of allergy caused by
the pollen of grasses, trees, etc.Reason It is characterised by the in flam ma tion of
the membrane lin ing the bronchioles.
46.As ser tion Vag i nal secretions are phys i cal bar ri ers
that pro vide protection against in fec tious microbes.
Reason Vaginal secretions are slightly acidic which
discourage bacterial growth.47.As ser tion Enteric fever is caused by Salmonella
typhi.Reason The pathogens of enteric fever are present
in the stool or in the urine.
48.As ser tion Primed cells are formed by T-lymphocytes.
Reason They recognise original invading antigens
even years after the first encounter.
49.As ser tion MALT are aggregations of lymphoid
tissues which are seen in relation to the mucosa of
the major tracts like alimentary canal.Reason They do not serve as filters of lymph.
50.As ser tion Opioids are termed as analgesic.
Reason Opioids bind to specific opioid receptors
present in central nervous system andgastrointestinal tract.