Contraction of the diaphragm causes
A. a person to exhale.
B. the size of the chest cavity to increase.
C. air to flow from the lungs to the outside.
D. compression of the lungs.
B. the size of the chest cavity to increase.
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When referring to membrane glycolipids and glycoproteins, the term "glyco-" indicates ____
a. carbohydrate groups are attached to the molecules b. the molecules are bound to the glycocalyx c. the molecules are found on both the interior and exterior of the membrane d. the molecules are attached to the membrane by ionic bonds e. the molecules are rarely found on the membrane exterior
What formula correctly represents the behavior of CO2 in the blood?
A. CO2 + H2O « H2CO3 « HCO3- + H+ B. CO2 + H+ « HCO3+ « H2O + H2CO3 C. CO2 + H2O « H2CO3 + CO D. CO2 + H2CO3 + O2 « H2O + CO2 + H2CO3 E. CO2 + HCO3- « H+ + H2O + H2CO3
The scrotum is a sac-like structure outside the abdomen in which the testes are suspended. Why is this structure essential?
A. There is too much hormonal influence if they remain in the abdomen. B. Sperm must be closer to the penis to be ejaculated. C. There is not enough space in the abdomen to grow properly. D. Lower temperature is required for normal development of sperm.
You are interested in understanding the regulation of nuclear lamina assembly
To create an in vitro system for studying this process you start with partly purified nuclear lamina subunits to which you will add back purified cellular components to drive nuclear lamina assembly. Before you start doing experiments, your instructor suggests that you consider what type of conditions would be most amenable to the assembly of the nuclear lamina from its individual subunits in vitro. Which of the following conditions do you predict would be most likely to enhance the assembly of the nuclear lamina? (a) addition of phosphatase inhibitors (b) addition of ATP (c) addition of a concentrated salt solution that is 10 times the concentration normally found in the nucleoplasm (d) addition of protein kinase inhibitors