The process of oogenesis (from undifferentiated germ cell to released ovum) takes anywhere from 11 to 50 years to complete
Indicate whether the statement is true or false
T
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A muscle contraction which does not result in a change in length is called ___________________. ________________________________________
Fill in the blank(s) with the appropriate word(s).
The cardiac electrical impulse normally begins spontaneously in the SA node because
A. of the superior location of the SA node in the right atrium. B. of action potentials from the cardioregulatory center. C. the SA node is the only area of the heart capable of spontaneous depolarization. D. of the rich sympathetic innervation of the SA node. E. this area produces action potentials more rapidly than any other portion of the conduction system.
Which of the following elements of a control system detects a change?
A) control center B) stimulus C) effector D) receptor E) efferent pathway
The hearts nodal cells have a more negative resting potential than neurons do, because nodal cells lack leak channels for sodium and potassium ions.
Answer the following statement true (T) or false (F)