(Question)
Q: A pacemaker uses electrical shocks to stimulate the what to beat properly? Choices: - brain - pancreas - liver - heart A:
(Answer)
heart

(Question)
Q: What term is used to describe how fast a chemical reaction occurs? Choices: - response time - catalysis - velocity - reaction rate A:
(Answer)
reaction rate

(Question)
Q: Spiders use the hydrostatic pressure generated by an open type of what anatomical system to extend their legs? Choices: - respiratory - pulmonary - vascular - circulatory A:
(Answer)
circulatory