Which of the following is impermeable to water?
Vertical limb of loop of Henle
Descending limb of loop of Henle
Ascending limb of loop of Henle
Both 'a' and 'b'
Which of the following part of human brain is associated with integration of sympathetic and parasympathetic activities ?
Cerebrum
Neopallium
Hypothalamus
Medulla oblongata
The unidirectional transmission of a nerve impulse through nerve fibre is due to :
neurotransmitters are released by axon endings
neurotransmitters which are released by dendrites
nerve fibre which is insulated by a medullary sheath
sodium pump which starts operating into the nerve fibre
The Largest quantity of air that can be expired, after maximal inspiration, is called :
tidal volume
vital capacity
residual volume
total lung volume
B.
vital capacity
The volume expired by a maximal compression of the chest, after maximal inspiration effort, is called vital capacity. It is the sum of volume of air inspired or expired in each normal breathe, volume of air in deepest possible inspiration and volume of air in forced expiration after normal expiration.
In the myopia eye defect, the rays of light :
do not enter the eye at all
meet at a focus in front of the retina
come to a focus at back of retina
come to a focus in between retina and iris
Sensory receptor of warmth located principally at the tip of fingers is known as :
Weber's organ
organ of Giraldes
Ruffini's corpuscles
organ of Zuckerkandl