The internal wall surface of each ventricle displays large, smooth, irregular muscular ridges called
A. conus arteriosus.
B. atrioventricular opening.
C. trabeculae carneae.
D. tendinous cords.
E. pectinate muscles.
C
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Which is not a membrane-bound organelle?
A. Endoplasmic reticulum B. Lysosome C. Golgi apparatus D. Peroxisome E. All of the choices are membrane-bound organelles.
When defective erythrocytes are broken down,
A. bilirubin is formed from the breakdown of hemoglobin. B. their iron is excreted into the small intestine. C. their components cannot be recycled. D. they are removed from the blood by the lungs. E. their heme groups are converted into amino acids.
The ____________________ process will form new vertically upstanding blood vessels.?
Fill in the blank(s) with correct word
Stimulation of granular cells by the sympathetic nervous system causes them to
A. release calcitriol. B. increase endocytosis. C. contract. D. relax.