What is the correct order for the following events that follow a nerve impulse along a sympathetic neuron to innervate
the heart?
1) G protein activates adenylyl cyclase
2) Neuron releases norepinephrine
3) Cyclic AMP activates protein kinase
4) Receptor activates G protein
5) Protein kinase phosphorylates Ca2+ channels
6) Receptors activated on the membrane of the cardiac muscle
a. 1, 3, 4, 5, 2, 6
b. 5, 3, 4, 1, 2, 6
c. 6, 2, 4, 1, 3, 5
d. 2, 6, 4, 1, 3, 5
e. 2, 3, 4, 1, 6, 5
d
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What will be an ideal response?
In animals that take in oxygen from their environment, glucose is broken down into carbon dioxide and water in a process called
A. anaerobic respiration B. aerobic respiration C. organic compound respiration D. glucose respiration
In the eighteenth and nineteenth centuries, people increased Earth's capacity to support more humans through ________ advances
A) demographic B) social-medical C) industrial-agricultural D) psychological E) cultural
Mollusk eyes and vertebrate eyes are
A. analogous structures, because they have the same function but derive from different common ancestors. B. homologous structures, because they are derived from the same common ancestor. C. homologous structures, because they have different functions. D. analogous structures, because they arise from the same structures during development.