Sympathetic fibers arise only from the ________ region(s) of the spinal cord.
A. cervical, thoracic, and lumbar
B. cervical
C. thoracic
D. thoracic and lumbar
E. lumbar
Answer: D
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Nerve impulses from ________ will result in inspiration.
A) the ventral respiratory group B) the chemoreceptor center C) Broca's center D) the preoptic nucleus of the hypothalamus
Which sequence correctly traces the steps of DNA replication?
(1) Weak bonds between nitrogenous bases of the DNA are disrupted. (2) DNA strands unwind. (3) DNA polymerase binds to exposed nitrogenous bases. (4) Ligases link together short complementary chains of nucleotides. (5) Nitrogenous bases of the DNA strand attract complementary nucleotides. A) 1, 2, 3, 5, 4 B) 1, 2, 3, 4, 5 C) 5, 4, 3, 2, 1 D) 4, 2, 3, 1, 5 E) 1, 3, 5, 2, 4
The typical resting heart rate beats at __________ beats per minute
Fill in the blank(s) with correct word
You observe that your friend has dimples. Dimples result from the presence of the dominant gene D; absence of dimples is a homozygous recessive condition (dd). What genotype or genotypes might your friend have?
A) dd only B) DD or Dd C) DD only D) Dd only