NEET · Biology · Body Fluids and Circulation doubts
10 doubts found
An Rh-negative mother's first Rh-positive baby is usually safe, but a second one is at risk. Why?
During the first delivery some Rh-positive fetal blood leaks into the Rh-negative mother, and she begins making anti-Rh antibodies -- but too late to harm the first baby.
Why is the human heart called myogenic, and what proves it?
A myogenic heartbeat originates in the heart muscle itself, not in nerves.
What does “Double circulation” actually mean in Body Fluids and Circulation, and why does it matter for NEET?
blood passes through the heart twice in one cycle -- a pulmonary circuit (heart-lungs) and a systemic circuit (heart-body).
I keep getting “Double circulation” questions wrong in Body Fluids and Circulation. What's the trap?
thinking human circulation is single like a fish's.
What does “Myogenic heart and the SAN” actually mean in Body Fluids and Circulation, and why does it matter for NEET?
the sino-atrial node, a patch of heart muscle, is the pacemaker that starts each heartbeat on its own.
I keep getting “Myogenic heart and the SAN” questions wrong in Body Fluids and Circulation. What's the trap?
thinking the brain fires every heartbeat.
What does “Blood clotting” actually mean in Body Fluids and Circulation, and why does it matter for NEET?
platelets and clotting factors build a fibrin mesh that seals a wound.
I keep getting “Blood clotting” questions wrong in Body Fluids and Circulation. What's the trap?
thinking red blood cells cause clotting.
What is the difference between artery and vein?
Arteries carry blood away from the heart (usually oxygenated, thick-walled, no valves); veins return blood to the heart (usually deoxygenated, thinner-walled, with valves). The pulmonary vessels are the exception.
How is Body Fluids and Circulation tested in NEET, and what should I focus on?
Prioritise the core ideas: Double circulation, Myogenic heart and the SAN, Blood clotting.