The processes that occur in the pre-embryonic period are
A) cleavage and implantation.
B) cleavage and placentation.
C) implantation and placentation.
D) implantation and embryogenesis.
E) placentation and embryogenesis.
A
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The process that allows cells to obtain energy, which requires the oxygen delivered by and the carbon dioxide removed by the respiratory system, is ________.
Fill in the blank(s) with the appropriate word(s).
Which statement is incorrect about cross bridges?
a. They are globular myosin heads that protrude from the thick filaments. b. They bend during muscle contraction. c. They attach and detach from actin during muscle contraction. d. They are not found in the I band. e. They bind with troponin during contraction.
The outermost layer of the wall of the heart is the ____
a. serous pericardium b. epicardium c. endocardium d. myocardium
Identify structure "A" on the neuron
A. Schwann cell B. Node of Ranvier C. neuron cell body (soma) D. dendrites E. axon