Of the following structures, the largest in diameter is the ________.
A. secondary bronchus
B. tertiary bronchus
C. trachea
D. primary bronchus
E. respiratory bronchiole
Answer: C
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In the following CT of the chest, the arrow points to the:
A) arch of the azygos vein. B) arch of the aorta. C) left atrium. D) left ventricle. E) pulmonary trunk.
In a female pig, the vagina and the urethra empty into the ________
A) uterine horn B) penis C) urinary bladder D) urogenital sinus
Wrapped around glomerular capillaries are cells with pedicels called ________.
Fill in the blank(s) with the appropriate word(s).
Answer the following questions true (T) or false (F)
1. Myofilaments shorten to produce muscle contractions according to the sliding filament mechanism. 2. Electrical gradients exist because sodium and potassium ions are separated on either side of the plasma membrane. 3. The Na+/K+ ATPase (Na+/K+ pump) maintains the concentration gradients for sodium and potassium ions by moving two sodium ions out of the cell and three potassium ions into the cell.