Autorhythmicity in the heart is the responsibility of:
A) contractile cells. B) cardiac pacemaker cells.
C) smooth muscle cells. D) skeletal muscle cells.
Answer: B
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"Excitation-contraction coupling" refers to the binding of energized myosin to actin.
Answer the following statement true (T) or false (F)
Sound vibrations are conducted from the malleus to the stapes to the incus
Indicate whether the statement is true or false
Starting in the abdominal cavity and progressing dorsally, which order would you cut through the layers in order to expose the kidney?
A. Peritoneum, perirenal fat capsule, fibrous capsule, and renal fascia B. Perirenal fat capsule, peritoneum, renal fascia, and fibrous capsule C. Renal fascia, peritoneum, perirenal fat capsule, and fibrous capsule D. Peritoneum, renal fascia, perirenal fat capsule, and fibrous capsule E. Peritoneum, fibrous capsule, renal fascia, and perirenal fat capsule
Which of the following is NOT true of the ventricles of the brain?
A. They are blood-filled chambers. B. There are 2 lateral ventricles. C. They are all interconnected. D. The fourth ventricle lies between the pons and the cerebellum. E. All of these are true of the ventricles of the brain.