Contraction

... a. an increase in plasma estrogen levels. b. a decrease in plasma LH levels. c. an increase in plasma inhibin levels d. an increased myometrial contraction. e. a rapid growth of her fetus.

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... I know that the heart can increase it's rate according to various stimuli what determines whether the heart increases the frequency of it's contraction or the strength of the beats/ stroke volume and does it vary depending on intensity of exercise ?

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You mean contraction of pupils? http://en.wikipedia.org/wiki/Miosis How is that related to ploidy?

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... can't find any physiological explanation for smooth muscle going into some sort of spasm after initial contact with cold water before resuming contraction albeit at a lower frequency and amplitude. Can anyone point me to some paper or explanation! Thanks!

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... education yet, but this is a grade 11 question quite frankly. I'll be generous and sauce you an answer, it's the pace setter because it Delays the contraction of the ventricles to ensure that the atria have pumped its blood into them. Don't ask a bunch of questions without showing that you atleast ...

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