When the embryonic mass of cells develops an internal cavity, the mass of cells is called a(n)
A. zygote.
B. morula.
C. blastocyst.
D. embryonic disc.
E. trophoblast.
C
Anatomy & Physiology
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Metals and plastics of artificial implants generally have high immunogenicity
Indicate whether this statement is true or false.
Anatomy & Physiology
If a substance has a pH that is less than 7, it is considered
A) a salt. B) neutral. C) acidic. D) a buffer. E) alkaline.
Anatomy & Physiology
As the respiratory system ages:
a. the costal cartilages harden b. a condition called “barrel chest” develops c. the strength of inspiratory and expiratory muscles decreases d. all of the above
Anatomy & Physiology
Sperm undergo a process of conditioning known as ________ after they arrive in the female reproductive tract.
Fill in the blank(s) with the appropriate word(s).
Anatomy & Physiology