The stage at which a pre-embryo is a solid mass of cells and enters the uterus is the ________.
A. trophoblast
B. blastocyst
C. morula
D. zygote
Answer: C
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Amino acids are carried to the ribosomes to be incorporated into polypeptide chains by ________.
Fill in the blank(s) with the appropriate word(s).
The placenta is the organ that:
a. Protects the fetus against shock or adhesion b. Directly connects the fetal and maternal blood supplies c. Transfers maternal nutrients to the fetus d. Connects the embryo to the vaginal wall
If voltage-gated Calcium channels were unable to function, cardiac muscle would still receive action potentials, but be unable to shorten.
Answer the following statement true (T) or false (F)
What is astigmatism?
A) A longer eyeball than the average person B) A shorter eyeball than the average person C) Irregular curvature of either the lens or cornea D) A lens that is cloudy.