3. What is the most likely reason COVID-19 patients experience afever?
A. Cytokines released from alveolar macrophages travel throughthe bloodstream to the hypothalamus , which increases bodytemperature.
B. Coronavirus enters the CNS and activates the medulla, whichincreases body temperature.
C. Coronavirus enters the CNS and activates the hypothalamus,which increases body temperature.
D. Cytokines released from alveolar macrophages travel throughthe bloodstream to the medulla , which increases bodytemperature.
5. Which is correct about the contraction sequence of theheart?
A. The atria and ventricles begin their contractions at theexact same time, but the atrial contraction only lasts half as longas the ventricle contraction.
B. The right atrium and ventricle contract at the same time, andas they are relaxing, the left atrium and left ventricle begin tocontract.
C. Contraction begins in the order: right atrium, then rightventricle, then left atrium, then left ventricle.
D. The two atria contract at the same time, and as they arerelaxing, the two ventricles contract together.
E. The contraction and relaxation of all four chambers happen atthe same time.
