Damage to the mesoderm during embryological development would affect the formation of the
A. thyroid.
B. brain.
C. heart.
D. teeth.
E. urinary bladder.
C
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The cerebral aqueduct runs through the ____________________.
Fill in the blank(s) with the appropriate word(s).
Sympathetic innervation of the heart arises from the ________ segments of the spinal cord.
A. T6?T11 B. T11?L2 C. T1?T5 D. T5?T10 E. T3?T8
Which of the following statements regarding erection is false?
A) It involves parasympathetic stimulation. B) Vascular channels in the erectile tissue become engorged with blood. C) Dilation of penile arteries occurs. D) It involves nitric oxide production by neurons. E) It is commonly the result of plaque in the blood vessels of the penis.
Hemostatic mechanisms are usually effective for completely arresting bleeding from small vessels, but rupture of medium to large vessels usually requires external intervention to stop bleeding
Indicate whether the statement is true or false