The term apoptosis refers to.
A) the period from life to old age.
B) degenerative changes associated with aging.
C) wear and tear cellular damage.
D) predetermined or programmed cell death.
Ans: D) predetermined or programmed cell death.
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Which choice describes the activation steps of a G protein-coupled receptor properly (and in correct order)?
A. Protein kinase activated, ion channel opened, ions enter and activate second messenger, G protein turned on B. Ligand binds to receptor, second messenger activated, G protein turned on, protein kinase activated C. Ligand binds to receptor, G protein activated, effector protein activated, second messenger made available D. Ion channel opened, G protein activated, second messenger synthesized, phosphatase ends signal
What property of water helps keep body temperature stabilized?
A) surface tension B) universal solvent C) heat capacity D) polarity
________ accounts for almost two-thirds of the weight of bone
A) Water B) Calcium carbonate C) Collagen fibers D) Fluoride E) Calcium phosphate
Branches of the popliteal artery include the
A) femoral artery. B) anterior tibial. C) iliac artery. D) dorsalis pedis. E) plantar arch.