List of top Human Anatomy and Physiology Questions

The cardiac output of a person at rest is 5 litres per minute and the mean aortic pressure is 100 mmHg.
During exercise, if the cardiac output doubles and mean aortic pressure rises to 110 mmHg, then the peripheral resistance in the systemic circulation will decrease by _______%.
(rounded off to the nearest integer). Assume venous pressure in systemic circulation to be negligible.
Which of the following statement(s) is/are CORRECT about isotonic and isometric tests?
Which of the following statement(s) is/are CORRECT about neuronal membrane and neuronal action potential?
In the electrocardiogram (ECG) of humans, the electrical signature of atrial repolarization is masked by the ________
\( ^9_6{C} \) and \( ^{10}_6{C} \) are ________, whereas \( ^9_6{C} \) and \( ^8_5{B} \) are _______
The duration of action potential in a ventricular muscle cell of a human heart ranges from ________ milliseconds.
The amount of air that moves in or out of the lungs with each respiratory cycle is:
Biological activity of synthetic adrenaline is almost:
The Wilson's disease is a rare inherited disorder due to accumulation in brain, liver, and other vital organs of:
Biological activity of synthetic adrenaline is almost:
Which of the following is called as cell-mediated (delayed) hypersensitivity:
Which of the following hormone is not secreted by the human placenta:
The cranial nerve that regulates the heartbeat is:
Which of the following cranial nerve is instrumental in motor function:
Progressive loss of bone that occurs in osteoporosis is an example of:
The visible coloured ring of the eye is called:
Outer covering of the testes is:
The appendicular skeleton in an adult consists of:
A mechanical ventilator operating in volume controlled mode is set to deliver 600mL of tidal volume (TV) with a flow rate of 40 L/min. The frequency of breathing is set to 10 breaths per minute. If the flow rate is doubled which one of the following happens ?
The visible coloured ring of the eye is called:
The approximate total cross sectional areas of various types of blood vessels are given below. It was estimated that the velocity of blood in the aorta is 30 cms-1. The time it will take for the blood to travel through a capillary of length 0.5 mm is_______ seconds. Give your answer rounded off to two decimal places.
Vessel TypeApproximate total cross sectional area (cm2)
Aorta4.5
Artery20
Arteriole400
Capillary4500
Venule40
Vein15
A person creates an apparatus as shown in the figure to exercise the extensor muscle of the hand. It is given that OP = 0.15 m, OQ = 0.35 m, θ = 30°, the weight of the lower arm = 20 N, the center of mass of the lower arm is at point P, the magnitude of the applied tensile force F = 50 N. If the extensor muscle is acting with a moment arm of 0.25 m, the muscle force required to hold the hand at the position shown in the figure is ______ N. Give your answer rounded off to the nearest integer.
A person creates an apparatus
The cranial nerve that regulates the heartbeat is:
Progressive loss of bone that occurs in osteoporosis is an example of:
The amount of air that moves in or out of the lungs with each respiratory cycle is: