Each vertebral arch is composed of two pedicles and two ________.
Fill in the blank(s) with the appropriate word(s).
laminae
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Unique voltage-gated Na+ channels in pacemaker cells that open when the membrane becomes more negative (hyperpolarizes) and bring about the initial depolarization in the pacemaker potential are called ________ channels
Fill in the blank(s) with correct word
The lining of the alveolus is coated with an oily secretion called ____________________.
surfactant mucus saliva membrane none of the choices are correct.
The anterior margin of the ovary is anchored by a peritoneal fold called the ________.
A. broad ligament B. mesovarium C. suspensory ligament D. ovarian ligament
Which of the following helps explain the increased tension seen in multiple wave summation?
A. increased motor unit recruitment B. increased concentration of calcium ions around the myofibrils C. exposure of more active sites on myosin myofilaments D. the breakdown of elastic elements in the cell E. decreased stimulus frequency