Answer:True
Explanation:
Nerve impulse must reach a certain threshold in a neuron before action potential can be generated to intiate conduction of action potential.
Therefore if mutiple impulses are generated and these are not upto thresholds , no matter how strong the stimulI are-NO ACTION POTENTIAL WILL BE GENERATED.
THIS IS ALL OR NONE PRINCIPLE
The all or none hypotheses can be best explain with flushing of the water closet after using it. If required volume of water is not pumped into the water closet storage above, no matter how long the handle is push, FLUSHING WILL NOT TAKE PLACE.Thus the threshold volume of water must be met.
Answer is a. securely attached.
An infant who is securely attached to its mother is confident enough to explore and play freely in an unfamiliar environment in the presence of the caregiver is present. When the caregiver is present, infant uses her as a "safe base". Only in presence of caregiver infant engages with the stranger and becomes upset in absence of the caregiver. On return of caregiver the child become happy again.
Answer:
constructive interference or superposition
the 2 waves are combining their amplitudes which is the height from baseline
Explanation:
Water or other molecules move down their concentration gradient without any energy.........
difference - simple diffusion uses help of transporting protein in the membrane whereas osmosis uses no help.
