The skin discoloration most likely to result from liver disease is
A. cyanosis.
B. jaundice.
C. hematoma.
D. pallor.
E. erythema.
B
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Sperm release ________ to break down the bonds between adjacent follicle cells surrounding the oocyte
A) relaxin B) hyaluronidase C) calcium D) zonal inhibiting proteins E) glucose
Why can't tetanus occur in the heart?
a. There are no distinct motor units in the heart. b. There is inadequate oxygen supply via the coronary circulation to metabolically support a sustained contraction. c. The refractory period in cardiac muscle lasts almost as long as the contraction. d. The heart contracts with maximal force every beat so it is impossible to increase the strength of its contraction. e. Vagal stimulation slows down the heart rate to prevent summation of contractions.
Curare blocks neuromuscular transmission by preventing the release of neurotransmitters from the motor neuron
Indicate whether the statement is true or false.
Which of the following does not have potentially teratogenic effects?
A. Smoking B. Infectious diseases C. Alcohol D. X-rays E. Sunlight