Tetanus of a muscle is thought to be caused by
A. high calcium ion concentrations in the sarcoplasm.
B. the rapid movement of sodium ions back into the sarcoplasmic reticulum.
C. an increase in stimulus strength.
D. increased temperature in the active muscle.
E. decreased amounts of calcium ions in muscle tissue.
A
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The ________ supplies muscles and other tissues of the neck, shoulder, and upper back.
A) vertebral artery B) internal thoracic artery C) axillary artery D) brachial artery E) thyrocervical trunk
Helper T cells secrete T-cell __________, which augments the activity of __________ T cells
Fill in the blank(s) with correct word
David woke up late for work and did not have time to eat breakfast. He ate dinner at 6 pm the previous night and has not eaten since. What will be the response of David's hormones?
A. David's liver will release insulin to raise blood glucose levels. B. David's liver will release glucagon to raise blood glucose levels. C. David's pancreas will release glucagon to raise blood glucose levels. D. David's pancreas will release insulin to raise blood glucose levels.
The figure illustrates a lateral view muscles of the head and neck. Which muscle is indicated by "B"?
A. Masseter B. Orbicularis oculi C. Sternocleidomastoid D. Temporalis E. Trapezius