What function do collagen and elastin have in arteries?
A. They provide elastic rebound of the arterial
wall to help smooth out blood flow.
B. They help to control blood flow within the
body by contracting with the smooth muscles
in the arterial wall.
C. They line the interior to provide a smooth
surface for blood flow.
D. They form valves to prevent the backflow
of blood.
E. All of the answer options are correct.
A
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Blood typing is based on:
a. antibodies on red blood cells b. antigens on red blood cells c. hemoglobin on red blood cells d. a protein in blood plasma e. gene sequencing
Asexual reproduction differs from sexual reproduction in that
What will be an ideal response?
____ and ____ help hold cells together
Fill in the blank(s) with the appropriate word(s).
Which statement is not true about leishmaniasis?
A) It is a slow infection that can persist for months to years. B) It is preventable by a vaccine which is recommended for travelers to endemic areas. C) Over twenty different Leishmania species may cause leishmaniasis. D) It is transmitted by sand flies. E) It is most prevalent in the tropics and subtropics.