Define activation energy (Ea)
What will be an ideal response?
Activation energy is the energy input required to overcome the repulsion of the atom's electrons and to allow an adequately strong collision to occur. All reactions must overcome activation energy to proceed.
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The ear-shaped surface where the sacrum articulates with the os coxae is the __________ surface.
Fill in the blank(s) with the appropriate word(s).
What cells of the stomach secrete pepsinogen?
a. stem cells b. mucous cells c. goblet cells d. parietal cells e. chief cells
Which nephrons have long nephron loops that extend deep into the medulla?
a) juxtamedullary nephrons b) medullary nephrons c) cortical nephrons
From the collecting ducts, lymph enters ________ and becomes part of the ________.
A. capillaries; blood supply B. veins; plasma C. arteries; serum D. lymph nodes; lymphatic trunks