Please answer the multiple choice -- please explain too!
1. As ventricular pressure increases during systole, the volumeof blood in the ventricle....
a. increases
b. decreases
2. Which of these is FALSE about the ejection of blood from theleft ventricle?
a. the pulmonary semilunar valve is open
b. the bicuspid valve is closed
c. the aortic semilunar valve is closed
d. the tricuspid valve is closed
3. During action potentials in the heart,
a. voltage-gated K+ channels slowly repolarize; voltage-gatedNa+ channels slowly depolarize; voltage-gated calcium channelsquickly depolarize; voltage gated K+ channels slowly repolarize
b. voltage-gated K+ channels quickly repolarize; voltage-gatedNa+ channels quickly depolarize; voltage-gated calcium channelsquickly depolarize; voltage gated K+ channels quicklyrepolarize
c. voltage-gated K+ channels quickly repolarize; voltage-gatedNa+ channels slowly depolarize; voltage-gated calcium channelsslowly depolarize; voltage gated K+ channels quickly repolarize
d. voltage-gated K+ channels quickly repolarize; voltage-gatedNa+ channels quickly depolarize; voltage-gated calcium channelsslowly depolarize; voltage gated K+ channels quickly repolarize
