Which of the following best describes the connection between cardiovascular disease and age?
O A. As people age, their blood vessels become more elastic leading to less cardiovascular disease.
O B. As people age, the heart becomes more efficient with each pump, increasing cardiac output
O C. As people age, blood pressure decreases leading to more cardiovascular disease.
O D. As people age, plaque builds up in the arteries increasing vessel resistance, which leads to disease.
<h2><u>Answer:</u></h2>
- D. As people age, plaque builds up in the arteries increasing vessel resistance, which leads to disease.
Plaque development can restrict these arteries, reducing blood flow to the heart. Reduced blood flow may eventually result in chest pain and shortness of breath A heart attack might be caused by a total blockage.
Answer:
to transport nutrients remove waste
Explanation:
Answer:
The correct order would be
1. An enzyme (RNA polymerase) binds to the parent DNA molecule or gene of interest.
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2. The double stranded-DNA gets separated at the location where the enzyme attaches.
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3. RNA nucleotides, complementary to nucleotides present in the parent DNA molecule, make bonds with the bases on a leading strand of the DNA.
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4. The RNA nucleotide chain forms an SS RNA (single-stranded RNA) molecule with the use of a DNA strand as a template.
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5. When a stop codon is reached, the RNA strand gets separated from the parent DNA molecule, leaves the nucleus, and enters the cytoplasm.
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6. During the final step, the separated strands of DNA rejoin.
The process transcription can be divided into three main steps:
Initiation: RNA polymerase associates with the promoter region of the gene of interest. It results in the separation of two strands of the DNA which forms the transcription bubble.
Elongation: RNA polymerase forms the RNA polymer on the template strand of the DNA. The RNA nucleotides based on the complementarity of template strand forms a single-stranded RNA molecule.
Termination: As soon as the RNA polymerase reaches the termination sequence of the template strand, it dissociates from the DNA resulting in the termination of the transcription.
Consequently, the newly synthesized RNA molecule is separated and the DNA rejoin.
Answer:
False
Explanation:
Myocardium's oxygen and nutrients are provided by coronary arteries. Coronary arteries are outside the heart and they wrap the whole heart to provide oxygen and nutrients.
Heart needs the continuous oxygen and nutrient supply for proper functioning like any other tissue of body. Any problem in coronary artery will lead to heart problem such as myocardial infarction.
The blood present inside the heart chambers does not provide any oxygen or nutrients to heart.
The main purpose of flowers on any plant is to attract pollinators such as bees and butterflies.
Hope I helped!