MCQ
1. B
2. B
3. B
4. C
5. C
6. C
Essay
1 hairs,mechanical: antibodies,engulf
2. We can wash hands before cooking or eating,we avoid cross contamination between raw
and cooked food. We should also wash the vegetables or the uncooked food thoroughly
3. Antibodies play a very crucial role in the immune system and provide a key defense
mechanism against pathogens, such as bacteria viruses and other microorganisms.
In Summary, antibodies play a multifaceted role in protecting the body against pathogens by
recognizing, neutralizing, and facilitating the elimination of these invaders. Their ability to
confer both immediate and long-term protection is a crucial component of the adaptive
immune system.
4. The human body has several defense mechanisms to protect itself from infections and
maintain overall health. These defense mechanisms can be categorized into two main types:
innate immunity and adaptive immunity. There are 2 Types of these Defense Mechanisms
which are the Innate Immunity and the Adaptive Immunity.
5. pulmonary artery— lung
Pulmonary vein–heart
Renal artery–kidney
Vena cava– heart
6.
Types of blood vessel
Thickness of wall
Presence of valves
Artery
thick
No
Capillary
Thinnest
no
Vein
Thick
yes
7.
-White blood cell
-Platelets