In cardiac cycle maximum time is taken by
Atria systole
Atria diastole
Ventricle systole
Ventricle diastole
B.
Atria diastole
The cardiac cycle is the event during, which one heartbeat or one cycle of contraction (systole) and relaxation (diastole) of cardiac muscle occurs. A cardiac cycle consists of systole and diastole of atria and systole and diastole of ventricles. The time of cardiac cycle is in reverse ratio of the rate of heartbeat. In man, the heart rate is about 72 times/train, therefore time of a cardiac cycle is 60/72 -0.8 sec approx\
| Time Taken | Atria | Ventricle | ||
| Systole | Diastole | Systole | Diastole | |
| 0.1 sec | 0.7 sec | 0.03 sec | 0.5 sec | |
Blood is a kind of
Areolar tissue
Connective tissue
Fluid connective tissue
Reticular connective tissue
The most active phagocytic white blood cells are
Neutrophils and eosinophils
Lymphocytes and macrophages
Eosinophils and lymphocyte
Neutrophils and monocytes
During urine formation, which of the following process create thigh osmotic pressure in the uriniferous tubule?
Active Na+ absorption, followed by absorption of Cl−
Active Cl− absorption, followed by absorption of Na+
Active secretion of Na+ into efferent arteriole followed by absorption of Cl− into the efferent renal arteriole
Active secretion of Cl− and absorption of Na+ into the efferent renal arteriole
If due to some injury the chordate tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?
The flow of blood into the aorta will be slowed down
The ‘pace maker’ will stop working
The blood will tend to flow back into the left atrium
The flow of blood into the pulmonary artery will be reduced
Haemoglobin is
An oxygen carrier in human blood
A protein used as a food supplement
An oxygen scavenger in root nodules
A plant protein with high lysine content
Carbon monoxide is a pollutant because it
Reacts with oxygen
Inhibits glycolysis
Reacts with haemoglobin
Makes nervous system inactive
Calcitonin is a thyroid hormone which
Elevates potassium level in the blood
Lowers calcium level in a blood
Elevates calcium level in the blood
Has no effect on calcium
The problem due to Rh factor arises when the blood of two (Rh and Rh) mixup
During Pregnancy
Through transfusion
In a test tube
Both (a) and (b)
