Sonic muscles are able to shorten even more than most muscles because of perforations in their __________ that allow the thick filaments to pass into adjacent sarcomeres
Fill in the blank with the correct word.
Answer: Z-disks
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The genotypes and phenotypes that result from a cross of AA and Aa (A = normal pigmentation and a = albinism) are
A. phenotypes:all normal; genotypes:50% homozygous dominant and 50% heterozygous. B. phenotypes:50% normal and 50% albino; genotypes:all heterozygous. C. phenotypes:all albino; genotypes:50% heterozygous and 50% homozygous recessive. D. phenotypes:75% normal and 25% albino; genotypes:75% heterozygous and 25% homozygous.
Identify three sources where research articles can be found
What will be an ideal response?
With a resting potential of -70mV and a threshold of -60mV, which of the following is a likely result of facilitation?
A. -95 mV B. +30 mV C. -67 mV D, -55 mV
What structure sends the electrical impulse to stimulate the atria to contract?
A. Purkinje fibers B. Sinoatrial node C. Atrioventricular node D. Atrioventricular bundle