The activity recorded by the electromyogram corresponds to: Select one: a. The electrical impulse of a single motor unit. b. The electrical impulses generated in many muscle fibers simultaneously. c. Only the positively charged repolarization of the muscle fibers. d. The electrical impulse of a single muscle fiber. e. Skin impulses generated by the mechanical energy of muscle movement.

B.The electrical impulses generated in many muscle fibers simultaneously.

Explanation:

Electromyography  is the process of  measuring the the voltage changes elicited in muscle fibres due to electrical stimulation of the muscle  fibres cells.

When a  single muscle fibre  is stimulated  it  generates  a  very weak voltage  (< 100 microvolts),however when more muscle fibres are stimulated  the voltage produced is large enough to produce action potential.Therefore, if an electrode is placed on the muscle cells under electrical  stimulation,a graphical display  is obtained on the screen with the x-axis of the graph corresponding to the time of  the electrical stimulation, and the y-axis to the internal   voltage potential of the muscle fibres.

Then the graph obtained corresponds to the  action potential generated  by the muscle fibres stimulated. This display is called Electromyogram.

Thus records and evaluation of the action potential generated is obtained.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above