An electrocardiogram (ECG) shows extra P waves. Determine and discuss the part of the conduction pathway that is not working
What will be an ideal response?
Extra P waves indicate that some action potentials from the sinoatrial (SA) node are not being conducted through the atrioventricular (AV) node at all. Extra P waves are characteristic of heart block.
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Activation of ______ receptors usually brings about _______
a. alpha-1, excitation b. alpha-2, inhibition c. beta-1, excitation d. beta-2, inhibition e. All of the above are correct choices.
During exercise, blood flow to skeletal muscles increases. What other blood flow changes occur?
A. Blood flow to skin, heart, and kidneys decreases. B. Blood flow to skin decreases, and flow to the kidneys increases. C. Blood flow to coronary vessels increases, and flow to abdominal organs decreases. D. Blood flow to coronary vessels increases, and flow to skin and brain decreases.
When comparing the female pelvis with the male pelvis, which of the following statements is false?
A. The female pelvis is heavier. B. The ilium is more flared in the female pelvis. C. The ischial spines are further apart in the female pelvis. D. The subpubic angle is 90 degrees or greater in the female pelvis. E. The female pelvis is broader.
In general, the substances in the filtrate that need to be conserved are selectively reabsorbed whereas the unwanted substances that need to be eliminated fail to be reabsorbed
Indicate whether the statement is true or false