Answer:
1) Macrophages ingest antigen 2) Helper T cells are activated 3) B cells differentiate into plasma cells and memory cells.
Explanation:
Innate immunity and adaptive immunity provide protection against foreign invaders. Innate immunity is non specific and adaptive immunity is specific immune response; includes the production of antibody after a sequence of events.
- When an antigen enters the body the phagocytic cells such as macrophages and dendritic cells ingest the antigen by a process called as phagocytosis. These cells act as antigen presenting cells and present it to T cells.
- T cells are of two types T helper cells and T cytotoxic cell. T cytotoxic cells killed the affected cell such as affected by virus while T helper cells signal for the production antibodies.
- Antibodies are produced from the plasma cells while memory cells act as record keeping. The plasma cells are stimulated by interleukins.
Magnitude and direction
Explanation:
A vector quantity has both magnitude and direction. This is different from a scalar quantity that has only magnitude but no direction.
- Examples of vectors are velocity, acceleration, displacement, momentum e.t.c
- These quantities are physical quantities in which their magnitude has specific directions through which they are channeled.
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Answer:
Option - E is the same distance from A and B.
Explanation:
Perpendicular bisector can be understood by this explanation:
If line n is intersected by line n at the center of line n
, then line m is the perpendicular bisector of line n
There are 4 right angles formed due to this perpendicular bisector around this mid-point
∵ Line CD ⊥ of segment AB
∴ Line CD intersects segment AB at the middle point of AB
∵ Line CD and segment AB intersected at point E
so, E ∈ AB and E ∈ CD
⇒ Point E is the mid-point of line AB
⇒ E is the same distance from A and B.
Thus, the correct option is - E is the same distance from A and B.
Answer:
B
Explanation:
B is the only statement that does not state a Fact
individual research can vary greatly, but aggregated data from recent studies demonstrates that women with acute stroke are less likely than men to receive IV thrombolysis as treatment. However, compared to research released prior to 2008, the extent of this disparity has diminished.
Meta-analysis:
Objective: We updated our meta-analysis to see if the 30% gender difference in IV recombinant tissue plasminogen activator (rtPA) treatment for stroke still existed. The original meta-analysis was based on papers published between 2000 and 2008.
Methods: Between 2008 and 2018, we located papers that detailed sex-specific IV rtPA treatment rates for acute ischemic stroke. Research that used hospital-based, registry-based, or administrative data to compile representative populations of individuals with ischemic stroke qualified as studies. To measure sex differences, odds ratios (ORs) with random effects were created.
Results: Throughout this 10-year period, 24 studies that were qualified for inclusion were found. According to a summary unadjusted OR of 0.87 (95% confidence interval [CI], 0.82-0.93) based on data from 17 studies including all ischemic stroke patients, women had 13% lower odds than males of obtaining IV rtPA therapy. However, there was a sizable amount of between-study variation. Seven studies that provided information on the subset of patients eligible for IV rtPA treatment likewise found lower treatment odds in women, however the summary OR of 0.95 (95% CI, 0.88-1.02) was not statistically significant. 33 research that were published between 2000 and 2018 were examined for time patterns, and it was discovered that there was evidence that the gender gap had shrunk in more recent years.
Conclusions: The results of individual research can vary greatly, but aggregated data from recent studies demonstrates that women with acute stroke are less likely than men to receive IV thrombolysis as treatment. However, compared to studies released prior to 2008, the extent of this disparity has diminished.
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