Refer to Figure 49-1. Which of the following would bind to an intracellular receptor?
a. 1
b. 3
c. 6
d. 8
e. 10
ANS: B
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In humans, nitric oxide is an important gaseous neurotransmitter. Nitric oxide is synthesized by three isoforms of nitric oxide synthase (NOS). What would be a likely effect if a male were missing the gene that codes for one of the NOS isoforms?
A. He would be unable to produce all the liquid components of semen. B. He would have a low sperm count due to decreased spermatogenesis. C. He would have high levels of mutation within his mature sperm. D. He would have difficulty getting and/or sustaining an erection.
Which trait is not found in metabolically active tissues that will encourage the release of oxygen?
a. High temperature b. Release from heme c. High pH d. High CO2 partial pressure e. Low pH
This figure describes a typical example of ____
a. biotic potential growth b. exponential growth c. logistic growth d. logarithmic growth e. density-dependent growth
What name is given to substances that resist changes in pH?
A) buffers B) solutions C) acids D) bases