Which of the following statements concerning erythrocytes is incorrect?
a. They do not contain any organelles.
b. They may take on many different shapes.
c. They originate from the same pluripotent stem cells as leukocytes and platelets.
d. They are unable to utilize the O2 they contain for their own ATP formation.
e. They only live about five days.
E
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In a class III lever system, the
a. fulcrum is located between the pull and the weight b. weight is located between the fulcrum and the pull c. pull is located between the fulcrum and the weight
The process by which molecules such as glucose are moved into cells along their concentration gradient with the help of membrane-bound carrier proteins is called
A) osmosis. B) facilitated diffusion. C) active transport. D) endocytosis. E) exocytosis.
Microglia are (the)
A) not a neuroglial cell. B) most numerous neuroglial cell. C) least numerous neuroglial cell. D) smallest neuroglial cell. E) None of the answers are correct.
Polymodal nociceptors
a. respond only to mechanical damage such as cutting, crushing, or pinching. b. transmit impulses along A-delta fibers. c. activate the slow pain pathway. d. release prostaglandins. e. none of these answers.