Stroke volume is the amount of blood that leaves the left ventricle of the heart with each contraction. If a person has a stroke volume of 80 ml/beat, how many liters would that be?

Explanation:

The amount of blood that leaves the left ventricle of the heart with each contraction is called Stroke volume.

A person has a stroke volume of 80 ml/beat. It means that it is 80 milliliters per beat.

We need to find how many liters would that be.

We know that, 1 litre = 1000 milliliters

1 mL = 0.001 L

To convert 80 mL to litres, we can do it as follows :

80 mL = (80 × 0.001) LL

= 0.08 L

Hence, he stroke volume of a person is 0.08 L/beat.

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

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