Biology, 24.12.2019 04:31 allieballey0727
When epinephrine binds to cardiac (heart) muscle cells, it speeds their contraction. when it binds to muscle cells of the small intestine, it inhibits their contraction. how can the same hormone have different effects on muscle cells? a. cardiac cells have more receptors for epinephrine than do intestinal cells
b. epinephrine circulates to the heart first and is in higher concentration around cardiac cells
c. the two types of muscle cells have different signal transduction pathways for epinephrine and thus have different cellular responses
d. cardiac muscle is stronger than intestinal muscle and thus has a stronger response to epinephrine
e. epinephrine binds to g-protein-linked receptors in cardiac cells, and these receptors always increase a response to the signal. epinephrine binds to receptor tyrosine kinases in intestinal cells, and these receptors always inhibit a response to the signal
Answers: 3
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Which two criteria must be met before scientist can use radiocarbon dating? explain your answer
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Which of the following options describes photosynthesis correctly? question 8 options: a plant uses carbon dioxide and water to make oxygen and nitrogen a plant breaks down sugar to make carbon dioxide. a plant uses sunlight, carbon dioxide, and water to make sugar and oxygen. a plant uses sunlight to break down sugars for digestion into water and oxygen.
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Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error? the object is an asteroid, not a dwarf planet.the object is a moon, not a dwarf planet.the object is not a dwarf planet because it travels with other objects.the object is not a dwarf planet because it is round.
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When epinephrine binds to cardiac (heart) muscle cells, it speeds their contraction. when it binds t...
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