In which order does blood from the veins flow through the mammalian heart?
a. left atrium, right ventricle, right atrium, left ventricle
b. left atrium, left ventricle, right atrium, right ventricle
c. right atrium, right ventricle, left atrium, left ventricle
d. right atrium, right ventricle, left ventricle, left atrium
c. right atrium, right ventricle, left atrium, left ventricle
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Facilitated diffusion is an important method for cells in obtaining necessary molecules and removing other ones. Requirements for facilitated diffusion include
A. The carrier molecule must be specific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient. B. The carrier molecule is nonspecific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient. C. The carrier molecule is nonspecific to the molecule that is transported. The direction of movement is always against the concentration gradient, never with the gradient. D. The carrier molecule must be specific to the molecule that is transported and an ATP molecule must be attached to the specific carrier. The direction of movement is always against the concentration gradient, never with the gradient.
The subunit of clathrin is__________
Fill in the blank(s) with the appropriate word(s).
Blood cell formation
What will be an ideal response?
Which subphylum includes members that are now all extinct, but which were once extremely numerous in shallow Paleozoic seas?
a. Crustacea b. Trilobita c. Hexapoda d. Myriapoda