In the cross-bridge cycle, the power stroke of myosin is immediately preceded by which of the following events?
A) The hydrolysis of ATP
B) Binding the actin
C) Releasing Pi
D) Binding new ATP
Answer: C
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From which part of the CNS do parasympathetic preganglionic axons of CN VII emerge?
A. Mesencephalon B. Cerebral cortex C. Pons D. Lateral horns of the S1 spinal cord segment E. Lateral horns of the T1 spinal cord segment
During which phase of the cell cycle do the chromosomes line up along the midline of the cell, and become attached to the spindle fibers?
A. Prophase B. Anaphase C. Telophase D. Interphase E. Metaphase
After a fracture occurs, a(n) ________ forms as a network of spongy bone unites the inner edges.
A) external callus B) blood clot C) spicule D) internal callus E) fracture hematoma
During this phase of cell division, the centromeres split leading to separation and subsequent migration of the two members of a chromatid pair to opposite poles of the cells. The cleavage furrow also begins to develop during this phase
a) interphase b) prophase c) metaphase d) anaphase e) telophase