Chemoreceptors located in the aortic and carotid bodies stimulate the respiratory control center in the brain when the blood ________ decreases.
A. pH
B. PO2
C. PCO2
D. HCO3- concentration
E. hemoglobin concentration
Answer: A
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If you were able to increase the kinetic energy of the molecules inside your body, how would this affect your body temperature?
A. It would increase B. It would remain the same C. It would decrease
You have identified a chromosome that has both p and q arms, but notice that the p arms are composed of highly repetitive DNA. What type of chromosome is this?
A) metacentric B) submetacentric C) acrocentric D) subacrocentric E) telocentric
Skeletal muscle contraction is stimulated by the neurotransmitter ______, which is released by nerves at the neuromuscular junction
a) acetylcholine b) nitric oxide c) dopamine d) glycine
Three weeks after conception, which of the following has happened in an embryo?
A) organ formation B) primitive eye formation C) limb bud formation D) neural tube formation