Stretching of tissues can cause pain sensations to arise from visceral organs
Indicate whether the statement is true or false
TRUE
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Nucleic acids are
A) structural molecules that have no function other than support. B) primary sources of cellular energy. C) very small, simple molecules. D) composed of building blocks called nucleotides.
When a giraffe holds its neck in a vertical position, its brain is about 2 meters above its heart. Contraction of the ventricle must create enough pressure to raise the blood to the level of the head and perfuse the brain (i.e
, circulate blood through the brain). The arterial pressure at the aorta of a giraffe is approximately 200 mm Hg, twice that of a human. The brain of a sauropod dinosaur, such as Barosaurus, would have been about 9 meters above the level of its heart if it held its neck vertically. Calculate the aortic pressure required to perfuse the brain using the following information: • The density of blood is 1.055 g/cm3 and the density of mercury 13.554 g/cm3 • An aortic pressure of 10 mm Hg is needed to overcome resistance to blood flow in the carotid arteries leading from the heart to the brain. • A blood pressure of 50 mm Hg at the head is required to perfuse the brain. What inferences about the biology of sauropods can you draw from your calculation?
The first eutherian mammal and the first metatherian mammal are both found in China. Is this an enormous coincidence?
What will be an ideal response?
Metabolism is a term that refers to all of the reactions in the body that involve energy transformations.
Answer the following statement true (T) or false (F)