If the connection between the SA node and AV node becomes blocked,
a. the QRS complex will be absent on an ECG
b. the ventricles will beat more slowly
c. the atria will beat slower
d. tachycardia will occur
e. both a and d will occur
B
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The narrow inferior part of the uterus is called the ________.
A. body B. isthmus C. fundus D. myometrium
Your study partner has concluded that a single action potential, once initiated, spreads down the length of an axon, non-decrementally; similarly, a single graded potential spreads down the length of a dendrite, but with decrement. Is she completely correct? Explain. How can the mechanism of decremental and non-decremental conduction help her sort this out? How is the process different in
myelinated vs. unmyelinated neurons? How may the dominoes analogy help her to understand signal propagation? What will be an ideal response?
In males, the hormone called ___________ stimulates the cells of Leydig
Fill in the blank(s) with correct word
The ability of the olfactory system to adapt to a particular odor may involve
A. sensitivity of the olfactory cortex. B. an increase in the sensitivity at the receptor sites. C. neurons from the medial olfactory area stimulating mitral cells and tufted cells. D. the intermediate olfactory area sending inhibiting impulses to the olfactory bulb. E. molecules that do not bind to receptors anymore.