When the nervous system signals a muscle to contract ________ ion channels open
A) Sodium B) Myosin C) Actin D) Phosphorus
A
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The type of connective tissue fiber that stretches is reticular fibers.
Answer the following statement true (T) or false (F)
Which of these body regions is located on the posterior body surface?
A) antebrachial B) umbilical C) gluteal D) plantar E) pubic
The cross-sectional view of the spinal cord reveals white matter on the
A. inside, gray matter on the outside, and a dorsal sensory root. B. outside, gray matter on the inside, and a ventral sensory root. C. inside, gray matter on the outside, and a dorsal motor root. D. outside, gray matter on the inside, and a ventral motor root.
Phospholipids are important components of the plasma membrane. What does "A" represent on the diagram?
A. phosphorus B. oxygen C. nitrogen D. polar (hydrophilic) region E. nonpolar (hydrophobic) region