At Very Low Concentrations,epinephrine Causes an Artery to Vasodilate

question 10

Multiple Choice

At very low concentrations,epinephrine causes an artery to vasodilate.At higher concentrations epinephrine causes the same artery to constrict.How can these different effects be explained?

• A)There is one type of epinephrine receptor that uses two second messenger systems
• B)There are two types of epinephrine receptors with different affinities for epinephrine that use two different second messenger systems
• C)There are two types of receptors for epinephrine that use the same second messenger system
• D)At higher concentrations epinephrine can pass through the plasma membrane and directly stimulate contraction within the cell

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Definitions:

Mean

The mathematical average of a set of numbers, calculated by adding them together and dividing by the number of terms in the set.

Descriptive Statistics

Statistical methods that summarize and organize the characteristics of a dataset, including measures like mean, median, mode, and standard deviation.

Range

The difference between the highest and lowest scores in a set of data, indicating the spread of scores.

p < .05

A statistical term indicating that the probability of the observed data, or more extreme, if the null hypothesis were true, is less than 5%, often used as a threshold for statistical significance.