Dizygotic twins result from
A) two egg cells and one sperm cell. B) two egg cells and two sperm cells.
C) one egg cell and one sperm cell. D) one egg cell and two sperm cells.
B
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Further contributing to vessel narrowing, oxidized LDL inhibits release of __________ from the endothelial cells
Fill in the blank(s) with correct word
Answer the following questions true (T) or false (F)
1. The sympathetic nervous system increases cardiac output by increasing both heart rate and stroke volume. 2. The sinoatrial (SA) node fires more rapidly at higher body temperatures, increasing cardiac output. 3. When studying, you should actively read the textbook by taking notes and making diagrams.
Which is avascular (lacks blood vessels)?
A. Connective tissue B. Epithelial tissue C. Muscle tissue D. Nervous tissue E. All of the choices are correct.
The sensory receptors of the semicircular canals are located in the
A) saccules. B) ampullae. C) cristae. D) utricles. E) both saccules and utricles.