The Following Questions Refer to the Data Shown Below Figure 421
-How Does the Hemocyanin of Arthropods and Molluscs Differ

question 8

Multiple Choice

The following questions refer to the data shown below.
Blood entering a capillary bed of a vertebrate was measured for the pressures exerted by various factors.
$$\begin{array} { l c c } & \begin{array} { c } \text { Arterial End of } \\\text { Capillary Bed }\end{array} & \begin{array} { c } \text { Venous End of } \\\text { Capillary Bed }\end{array} \\\hline \text { Hydrostatic pressure } & 10 \mathrm {~mm} \mathrm { Hg } & 14 \mathrm {~mm} \mathrm { Hg } \\\text { Osmotic pressure } & 26 \mathrm {~mm} \mathrm { Hg } & 26 \mathrm {~mm} \mathrm { Hg } \\\mathrm { PO } _ { 2 } & 100 \mathrm {~mm} \mathrm { Hg } & 42 \mathrm {~mm} \mathrm { Hg } \\\mathrm { PCO } _ { 2 } & 40 \mathrm {~mm} \mathrm { Hg } & 46 \mathrm {~mm} \mathrm { Hg }\end{array}$$
Figure 42.1
-How does the hemocyanin of arthropods and molluscs differ from the hemoglobin of mammals?

• A)The oxygen dissociation curve for hemocyanin is linear.
• B)Hemocyanin carries appreciably more carbon dioxide.
• C)Hemocyanin has protein coupled to copper rather than iron.
• D)The protein of hemocyanin is not bound to metal.
• E)Hemocyanin includes cyanic acid.

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Definitions:

Enzymes

Biological molecules that significantly speed up the rate of virtually all of the chemical reactions that take place within cells.

Plasmodesmata

Channels in plant cell walls that enable communication and transport between cells.

Cytoplasm

The cytoplasm is the gel-like material inside the cell membrane of all cell types, containing organelles and soluble molecules like enzymes and nutrients, involved in cellular processes.

Energy Transformations

The process of changing one form of energy into another, such as the conversion of electrical energy to heat energy.