Excretion is the process of removing nitrogenous waste material, excess salts, and excess water from the body.?
Indicate whether the statement is true or false
True
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Which is correct about the contraction sequence of the heart?
A. Contraction begins in the order: right atrium, then right ventricle, then left atrium, then left ventricle. B. The atria and ventricles begin their contractions at the exact same time, but the atrial contraction only lasts half as long as the ventricle contraction. C. The contraction and relaxation of all four chambers happen at the same time. D. The two atria contract at the same time, and as they are relaxing, the two ventricles contract together. E. The right atrium and ventricle contract at the same time, and as they are relaxing, the left atrium and left ventricle begin to contract.
Hypoxemia can be caused by all of the following EXCEPT
A) Reduced activity level. B) Inadequate ventilation. C) Reduced blood hemoglobin content. D) Some disease states.
The pubic symphysis connects the two hip bones anteriorly and provides a little movement during childbirth. Choose the most appropriate tissue for this structure that is subjected to both pressure and stretch
A) elastic cartilage B) fibrocartilage C) hyaline cartilage D) bone
Which membrane-bound structures in the cytoplasm contain powerful digestive enzymes?
a. mitochondria b. chloroplasts c. Golgi apparatus d. lysosomes