Oxytocin is responsible for
A. preventing release of insulin from the pancreas.
B. preventing the formation of goiters.
C. milk production by the mammary glands.
D. regulating blood calcium levels.
E. causing contractions of uterine smooth muscle during labor.
E
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An atom with 3 electrons in its outermost (valence) shell may have a total of ________ electrons altogether
A) 13 B) 8 C) 17 D) 3
Which of the following is involved in the pathway that causes a jump in ventilation rate at the beginning of exercise?
A) Proprioceptors in muscles send information to the motor cortex of the brain. B) Output from the limbic system and cardiovascular control center triggers parasympathetic discharge and widespread vasoconstriction causes increase in blood pressure. C) Output from the limbic system and cardiovascular control center triggers parasympathetic discharge. D) Widespread vasoconstriction causes increase in blood pressure. E) Proprioceptors in muscles send information to the motor cortex of the brain and widespread vasoconstriction causes increase in blood pressure.
During this phase of mitosis, the mitotic spindle forms and the nuclear envelope fragments
A) anaphase B) metaphase C) telophase D) prophase
What is a role of calcium ions in the second-messenger cascade involving phospholipase C, diacylglycerol, and inositol triphosphate?
A. It splits and activates G-protein subunits. B. It binds to the endoplasmic reticulum and causes the release of inositol trisphosphate. C. It phosphorylates cell proteins. D. It is the first messenger that binds to the integral membrane protein receptor. E. Along with diacylglycerol, it activates protein kinase C.