The process of sperm gaining the ability to fertilize an ovum as they pass through the female reproductive tract is called ________.
A. capacitation
B. spermatogenesis
C. receptiveness
D. spermiogenesis
Answer: A
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The defecation reflex
a. is initiated when mass movements force fecal material into the rectum, stimulating stretch receptors in the rectal wall b. involves relaxation of the internal anal sphincter c. involves contraction of the sigmoid colon and rectum d. can be overridden by voluntary contraction of the external anal sphincter e. has all of the above characteristics
The term "codon" refers to
A. a three-nucleotide sequence of DNA that codes for a protein. B. an amino acid that is coded for by three bases of DNA. C. a three-base sequence of mRNA. D. the part of a rRNA molecule where a new amino acid is added. E. the part of tRNA that is a triplet of bases that forms hydrogen bonds with complementary sequences.
________________________________________ immunity occurs with the ingestion of colostrum by a newborn
Fill in the blank(s) with correct word
The sarcoplasmic reticulum is the smooth endoplasmic reticulum of a muscle fiber
Indicate whether the statement is true or false