1. The entity that is responsible for the initiation of electrical impulses that causes the heart to beat. State its location.
Give the scientific term (full form not short form).
2. The pleural fluid fills the space between the walls of the heart and provides protection against shocks.
State true or false. If false, correct the statement.
3. Assertion(A): Blood helps to maintain a constant body temperature. Reason(R): Blood is responsible for distributing heat throughout the body.
A is true and R is false
A and R are true and R is a correct explanation for A
R is true and A is false
A and R are true but R is not a correct explanation for A
Other:
4. Distinguish between the arteries and veins on the basis of the direction of the flow of blood and the type of blood they carry.
5. Name the component of blood responsible for fighting against pathogens. Which is the site of production of these components?
Answers
1,SA node (sinoatrial node) – known as the heart's natural pacemaker. The impulse starts in a small bundle of specialized cells located in the right atrium, called the SA node. The electrical activity spreads through the walls of the atria and causes them to contract. This forces blood into the ventricles.
2,
Pleural fluid functions by lubricating the space between the pleura, allowing the pleura to glide smoothly during inhalation and exhalation. In this way, it cushions delicate lung tissues against friction from the ribs and the chest wall itself.
3,sorry for this
4,Arteries and veins (also called blood vessels) are tubes of muscle that your blood flows through. Arteries carry blood away from the heart to the rest of the body. Veins push blood back to your heart. You have a complex system of connecting veins and arteries throughout your body.
5,Hemoglobin (Hgb) is an important protein in the red blood cells that carries oxygen from the lungs to all parts of our body. The main job of white blood cells, or leukocytes, is to fight infection.