Isovolumetric contraction . A) refers to the short period during ventricular systole when the ventricles are completely closed chambers B) occurs while the atrioventricular (AV) valves are open C) occurs immediately after the aortic and pulmonary semilunar valves close D) occurs only in people with heart valve defects

When analyzing the election of 1876, what conclusion can be drawn? a.a majority of northerners wanted to enforce reconstruction policies more stringently.b.if tilden had won the electoral votes from louisiana, florida, or south carolina, he would have been elected president.c.the republican party had increased its support in the south.d.rutherford hayes did poorly in the western states.e.the republican party did a good job protecting the voting rights of african-americans in mississippi.

Read the paragraph below and answer the question that follows. "andy was asked to speak in a school assembly about a fundraising opportunity for a fellow student who had recently been diagnosed with leukemia. andy's stomach hurt and his hands were cold. "steady man," he thought. "you can do this. it's for tim. he needs our ." andy could picture the students wanting to get involved. it occurred to him now that he wasn't just giving a speech. he had something worthwhile to say. which strategies did andy use to reduce his apprehension? select all that apply." be prepared. use muscle relaxation techniques. get experience. think positively. focus on communicating to the audience.

The u.s. intervened in korea and vietnam to stop the spread of