In the model for quiet breathing, expiration is induced by
A) activation of expiratory neurons in the ventral respiratory center.
B) abrupt termination of inspiration.
C) activation of inspiratory neurons in the ventral respiratory center.
D) activation of expiratory neurons in the dorsal respiratory center.
E) activation of inspiratory neurons in the dorsal respiratory center.
Answer: B) abrupt termination of inspiration.
You might also like to view...
An enzyme may lose its ability to function because of
(a) excessively high temperatures. (b) a change in its three-dimensional structure. (c) a large change in the pH of the environment. (d) all of the above.
Transformed cells contain
(a) transformants. (b) new genes. (c) bacteria. (d) none of these choices.
What does one call a mutation that occurs in a DNA sequence, but leaves the resulting amino acid sequence unchanged?
What will be an ideal response?
Which statement about microarrays is false?
A) Microarrays enable scientists to determine the activity of thousands of genes at once. B) Microarrays use tiny portions of double-stranded RNA fragments from a large number of genes. C) Microarrays are used to determine which genes are active in different tissues or in tissues of different states of health. D) Microarrays use fluorescently labeled cDNA molecules to identify particular genes expressed at a particular time.