Intercalated disks are gap junctions between cells of:
a. smooth muscle tissue.
b. skeletal muscle tissue.
c. cardiac muscle tissue.
d. both skeletal and cardiac muscle tissue.
e. all forms of muscle tissue.
C
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Tritiated hydrogen (3H) differs from hydrogen (1H) in that
A. 3H has 2 more protons than 1H. B. 3H has 2 more electrons than 1H. C. 3H has 2 more neutrons than 1H. D. 3H has the same number of neutrons as 1H. E. 3H has a different electron configuration than 1H.
In a monohybrid cross AA × aa, what proportion of homozygotes is expected among the F2 offspring?
A) 1/4 B) 1/2 C) 3/4 D) All are homozygotes. E) None are homozygotes.
What is TRUE about the settlers of Easter Island?
a. The settlers traveled 2000 km across the ocean to arrive there. b. The population of the island peaked at 100,000 people. c. People were already living there when the settlers from Polynesia arrived. d. The island had been settled repeatedly over the years, but nobody stayed until the 1700s.
Sensations of fear, pleasure, and sexual arousal are produced by the ________
Fill in the blank(s) with correct word