In the technique called optogenetics, light-gated na channels are introduced into the brains of living animals. activation of these channels by light can depolarize the membranes of neurons that contain them, selectively activating these target cells. since its inception, optogenetics has been expanded to include other types of light-gated channels, such as a channel that is selective for cl– instead of na . if this light-gated cl– channel were introduced into neurons in a region of the brain that stimulates feeding, what might you expect to see?

On a average work day more than work place firs are reorted

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?