An action potential causes calcium ions to diffuse from the _____ into the _____.
Fill in the blank(s) with the appropriate word(s).
sarcoplasmic reticulum; sarcoplasm
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When cells are arranged in a scalelike or flat arrangement, they are referred to as ________
A) Transitional B) Cuboidal C) Squamous D) Columnar
A cell that produces many proteins for secretion would have large numbers of
A. ribosomes and centrioles. B. rough ER and Golgi apparatus. C. lysosomes and Golgi apparatus. D. mitochondria and cilia. E. Golgi apparatus and microvilli.
The approximate number of protein-encoding genes on the Y chromosome is
A. greater in males than females. B. >1,500. C. 10. D. 231.
Choose the correct statement about amphimixis.
A) a process that results in a zygote B) a genetic disorder based on autosomal dominance C) the transition from morula to blastocyst D) the time during which sperm travel toward the ovum E) the formation of the male and female pronuclei