List the maters surrounding the brain from the deepest layer to the most superficial layer. (Figure 14-3)
A) dura, arachnoid, pia
B) pia, arachnoid, dura
C) arachnoid, dura, pia
D) arachnoid, pia, dura
E) pia, dura, arachnoid
B
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Peroxisomes are membrane-bound organelles
Indicate whether this statement is true or false.
The second-messenger mechanism of hormone action operates by ________
A) synthesizing more than one hormone at a time B) binding to specific receptors and employing the services of G proteins and cAMP C) increasing the basal metabolic rate in the target organ D) altering gene expression in the nuclear DNA
Which of the following is a characteristic of double-stranded DNA?
2 nanometers in width 10 bases of length per turn 0.34 nanometers per base pair 2 nanometers in width and 10 base pairs per turn 2 nanometers in width, 10 bases of length per turn, and 0.34 nanometers per base pair
The partial pressure gradient for oxygen in the body is much steeper than that for carbon dioxide. Explain how equal amounts of these two gases can be exchanged (in a given time interval) in the lungs and at the tissues. What law describes this
phenomenon? What will be an ideal response?