What is the expected action if someone observes capillary bleeding?

Applying pressure is the appropriate action when capillary bleeding is observed. This type of bleeding typically involves small blood vessels—the capillaries—and often results in a steady, slow seepage of blood. By applying direct pressure to the wound, you can help to promote clotting and reduce blood loss, allowing the body's natural healing processes to take over.

This method is generally effective for minor cuts and scrapes where the bleeding is not profuse and can usually be managed without more invasive measures. Maintaining pressure for several minutes can create the necessary conditions for the blood to coagulate and the wound to begin healing. It's important to note that if bleeding does not stop after applying pressure or if the injury appears more serious, further medical assistance may be needed.

In the context of the other options, calling for help may be appropriate in significant bleeding situations, but capillary bleeding usually does not necessitate immediate emergency assistance. Ignoring the bleeding is not advisable, as this could lead to further complications, and using a tourniquet is reserved for more severe forms of bleeding, such as arterial bleeding, where immediate intervention is vital. Thus, for capillary bleeding, applying pressure is the most effective and suitable response.