PATHOLOGY

PATHOLOGY MCQ

IMMUNE RESPONSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How is lymph moved through lymphatic vessels?
A
Contractions of the small intestine
B
Blood cells carry lymph through the vessels
C
Contractions of the heart
D
Contractions of skeletal muscle around the vessels
Explanation: 

Detailed explanation-1: -There is no pump in the lymphatic system like the heart in the cardiovascular system. The pressure gradients to move lymph through the vessels come from the skeletal muscle action, respiratory movement, and contraction of smooth muscle in vessel walls.

Detailed explanation-2: -The Lymph is moved through the lymphatic vessels by contractions of the lymphatic vessels and the movement of the surrounding digestive system and skeletal muscles.

Detailed explanation-3: -They lack a central pump (like the heart in the cardio vascular system), so smooth muscle tissue contracts to move lymph along through the vessels. Skeletal muscle contractions also move lymph through the vessels. The lymphatic vessels make their way to the lymph nodes, and from there the vessels form into trunks.

Detailed explanation-4: -That’s because the lymphatic system does not have an organ like the heart to pump fluid around your body. Lymph fluid relies on movement and the contraction of your muscles to make it flow.

Detailed explanation-5: -What is the role of skeletal muscle contractions in the flow of lymph? Skeletal muscle contraction causes lymph fluid in nearby lymphatic vessels to be pushed further away from the upper thorax. Skeletal muscle contraction compress lymphatic vessels, encouraging the lymph to flow toward the upper thorax.

There is 1 question to complete.