What is the difference of high and low potassium levels in the extracellular fluid during secretion in the urinary system?
If potassium levels are low in the extracellular fluid then the nerve and muscles cell will hyper-polarize and reduce excitability. If potassium levels are high in the extracellular fluid membrane excitability will increase especially in heart which can cause cardiac arrhythmias.
If a species has 2n=16 chromosomes then how many chromosomes will it's zygotes have?
it's zygotes will have 16 chromosomes
If a doctor were to perform an emergency tracheotomy to open a patient's airway where would the incision need to be made and how would you go about finding it?
The incision would need to be made in the circothyroid membrane located directly below the Adam's Apple on the neck. You can find the Adam's Apple by feeling for the small jugular lump on the uppermost of the neck region.