The blood vessel with the highest blood pressure is the:
A. Aorta
B. Pulmonary artery
C. Vena cava
D. Capillary
Answer: Option A
Solution (By JKSSB Mock Tests)
The aorta receives blood directly from the left ventricle under high pressure (systolic ~120 mmHg). Pressure decreases as blood moves through arteries, capillaries, and veins. Vena cava pressure is near zero.
Explanation:
Natural passive immunity is transferred from mother to child via placental transfer of IgG antibodies (in utero) and IgA antibodies in breast milk (colostrum). It provides temporary protection without the infant's immune system being activated. Active immunity results from natural infection or vaccination.
Explanation:
The retina is the light-sensitive inner layer of the eye containing photoreceptors (rods and cones) where an inverted real image is formed. The cornea and lens focus light onto the retina. The optic nerve transmits impulses from the retina to the brain for interpretation. The fovea centralis is the point of sharpest vision.
Explanation:
Adenosine triphosphate (ATP) stores energy in its high-energy phosphate bonds and releases it for cellular work. Glucose and NADH are fuel molecules, not direct energy carriers.
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