Q.2) The study of structure and arrangement of tissue is called as a) anatomy
b) histology
c) microbiology
d) morphology

The study and arrangement of tissue is called Histology.
Anatomy is concerned with the study of structure of the organisms and their parts.
Microbiology is the scientific study of micro-organisms.
Morphology deals with the study of form and structure animals, plants and other organisms.
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Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.

Nerves are problay the number 1 thing in the body