Which of the following is not characteristic of aging at the tissue level?
A. Atherosclerosis develops.
B. Rate of red blood cell synthesis declines.
C. Injuries heal rapidly and more completely in older people.
D. Arterial walls become less elastic.
E. Connective tissue experience reduced flexibility and elasticity.
Answer: C
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Which of the labeled papilla houses 100—300 taste buds each?
v a) A b) B c) C d) D e) Both A and D
__________ fish inflate their swim bladders indirectly via a vascularized region of the bladder called the gas gland
Fill in the blank with the correct word.
Thyroxine is a peptide hormone, but its mechanism is different from other peptide hormones. Which of the following statements is true concerning this difference?
A) It causes positive feedback. B) It does not require a second messenger to effect a response. C) It is very specific in the cell type it targets. D) It is a stimulant of cellular metabolism and targets all cells.
Linoleic acid is an essential amino acid.
Answer the following statement true (T) or false (F)