The peripheral chemoreceptors that respond to oxygen levels of the blood and regulate heart activity are located in
A. the medulla oblongata.
B. the right ventricle.
C. the infundibulum of the hypothalamus.
D. structures near the carotids and aortic arch.
E. the left ventricle.
Answer: D
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a) ionized form makes body fluids acidic b) ionized form is most plentiful anion in extracellular fluid c) ionized form is needed for action of many enzymes d) is a component of all proteins and nucleic acids e) ionized form is most plentiful cation in extracellular fluid
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A. Some separate bones gradually fuse with age. B. Bones are reabsorbed with age. C. Many bones are replaced by cartilage with age. D. Osteoporosis leads to bone loss with age. E. Osteoclast activity overcomes osteoblast activity with age.
Increased expression of ________ in the plasma membranes will promote the cellular uptake of glucose.
A. leptin B. glucagon C. GLUT4 D. insulin
Which is a TRUE statement about implantation of a blastocyst?
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