Persons with type AB blood are sometimes called universal donors
Indicate whether the statement is true or false
FALSE
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If an animal cell has 18 chromosomes and undergoes mitosis, how many chromosomes would each daughter cell have?
A) 9 B) 36 C) 23 D) 18 E) It varies, but the total number in the two daughter cells will always add up to 18.
When light encounters a medium of different density, it is
A) refracted. B) diffracted. C) reflected. D) angled. E) absorbed.
Active hyperemia
a. refers to the arteriolar dilation that occurs within a tissue in response to local chemical changes that accompany increased metabolic activity of the tissue. b. refers to local arteriolar mechanisms that are aimed at keeping tissue blood flow fairly constant in spite of rather wide deviations in mean arterial driving pressure. c. refers to the increase in blood flow to a tissue that occurs after removal of an occlusion of its blood supply. d. is important in maintaining an adequate pressure head to drive blood forward into a tissue. e. none of these answers.
Which of the following is NOT a stage in the development of the central nervous system?
A) neural tube B) neural plate C) three-vesicle (three-pouch) brain D) four-vesicle (four-pouch) brain