How are cells, tissues, organs and body systems related?

1 answer:

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Cells are the basic building blocks of life, which can join together to form tissues, while different groups of tissues join together to form organs. These organs are then connected together to form organ systems , such as the digestive system , which includes the stomach , esophagus , intestines and other organs .

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1. Write the function of valves in veins .

zheka24 [161]

Answer:

•After the left ventricle contracts, the aortic valve closes and the mitral valve opens, to allow blood to flow from the left atrium into the left ventricle.

•As the left atrium contracts, more blood flows into the left ventricle.

•When the left ventricle contracts again, the mitral valve closes and the aortic valve opens, so blood flows into the aorta.

•Diffusion is defined as the movement of individual molecules of a substance through a semipermeable barrier from an area of higher concentration to an area of lower concentration.

Explanation:

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2 years ago

(select all that apply.) the mismatch of a dna base pair during duplication can result in a _____.

Igoryamba

<span>Out of the following given choices;</span>

mutation

recombination

differentiation

change

<span>The answer is change and mutation. When there is a mismatch base pair the mismatch repair mechanism of the polymerase enzyme kicks in. if the mismatch repair is defective, then a mutation will occur at the site of the mismatched base. These mutations can result in changes in the phenotype of the cell that results in disease. </span>

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4 years ago

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What role does an enzyme play when the body processes sucrose into glucose and fructose

Olegator [25]

The enzyme increase the rate at which the sucrose gets broken down.

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3 years ago

Why do modern scientists use repeated experiments to develop and test hypotheses?

Sav [38]

To make sure that the hypothesis is correct.

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