For most muscle activities it usually lasts at least 90 seconds in duration for you to solely rely with lactic acid.
I don't think anybody could answer that question,because you have to be a snail to give a another snail head!
Answer:
At first, a fetus cannot distinguish between different voices.
A fetus begins responding to sound at between 22 and 24 weeks but can only hear low frequencies, such as a dog barking or a lawn mower.
As the auditory system and the brain continue to develop, this range increases. By late pregnancy, the fetus can hear voices and distinguish between
so at 22 weeks they're in the middle of the second trimester and can hear sounds but in the 3rd trimester can distinguish between voices
Included in the algorithm are critical time goals set by the National Institute of Neurological Disorders (NINDS) for in-hospital assessment and management. These time goals are based on findings from large studies of stroke victims:
Immediate general assessment by a stoke team, emergency physician, or other expert within 10 minutes of arrival, including the order for an urgent CT scan
Neurologic assessment by stroke team and CT scan performed within 25 minutes of arrival
Interpretation of CT scan within 45 minutes of ED arrival
Initiation of fibrinolytic therapy, if appropriate, within 1 hour of hospital arrival and 3 hours from onset of symptoms. rTpa can be administered in “well screened” patients who are at low risk for bleeding for up to 4.5 hours.
Door-to-admission time of 3 hours in all patients
