The union of a sperm and an egg is known as
A. fertilization
B. secretion
C. a blastocyst
D. implantation
E. cytology
Answer: A
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Which of the following statements regarding the atria is FALSE?
A) Atria are the upper chambers. B) The two atria are separated by a septum. C) Atria pump blood out of the heart. D) Atria receive blood into the heart.
What is the collective purpose of nasal hair, mucus secretions in the naspopharyngeal tract,
phagocytic cells in the throat, bronchial lysozyme, sneezing, and coughing? A) To keep normal flora in the oropharynx from entering the eustachian tube causing infection. B) To keep normal flora in the oropharynx from causing infection. C) To maintain a sterile environment in the oropharynx. D) To keep organisms from entering the lower respiratory tract and causing infection.
A medical term that means vomiting blood is ________.
Fill in the blank(s) with the appropriate word(s).
The right lung has two lobes and the left lung has three
Indicate whether the statement is true or false