The paraventricular nucleus of the hypothalamus secretes ________, which stimulates smooth muscle contraction in the uterus.
Fill in the blank(s) with the appropriate word(s).
oxytocin
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After a steroid hormone binds to its receptor to form an active complex,
A) adenylyl cyclase is activated. B) cAMP is formed. C) G proteins are phosphorylated. D) gene transcription is initiated. E) ion channels are opened.
Which of the following does NOT contribute to increased stroke volume during exercise?
A. increased contractility of cardiac muscle B. increased venous return C. increased length of filling time during diastole D. increased sympathetic stimulation of ventricular muscle E. increased end-diastolic volume
Sperm use ________ for movement.
A. microvilli B. cilia C. flagella D. microfilaments
In order for a sensation to become a perception,
A) it must be received by the somatosensory cortex. B) the individual must vocalize about it. C) it must arrive over fast-conducting nerve fibers. D) the other senses must be silent. E) it must be received by the pulvinar nucleus of the thalamus.