Phenotypic sex is determined at the moment of fertilization
a. True
b. False
Indicate whether the statement is true or false
False
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In order for a cell to respond to the signaling molecule epinephrine, it must ____
a. have ion channels b. have a lipid bilayer that allows the response to occur c. have receptors exposed on the inner plasma membrane surface d. have receptors exposed on the plasma membrane surface e. have nuclear membrane receptors
High density lipoproteins
a. carry cholesterol to the liver. b. line the artery walls. c. are used for nutrition. d. lower blood pressure. e. carry cholesterol and other fats to body cells.
Patients with McArdle's Disease lack an enzyme in their livers that catabolizes glycogen. Compared to an unaffected individual, what would you predict about the blood glucose levels of a patient with McArdle's disease?
A. Blood glucose levels would be normal, because glycogen is made up of amino acids. B. Blood glucose levels would be higher because they cannot break down glycogen. C. Blood glucose levels would be higher because they cannot make glycogen. D. Blood glucose levels would be lower because they cannot break down glycogen. E. Blood glucose levels would be lower because they cannot make glycogen.
The two-signal activation process for T cells includes
A) interaction of the T-cell receptor with the MHC-antigen complex on the APC AND binding between co-stimulatory proteins on the T cell and APC surfaces. B) the presence of a superantigen and the presence of appropriate antibodies. C) interaction of the T-cell receptor with the MHC-antigen complex on the APC AND the presence of a superantigen. D) the presence of antibodies AND binding between co-stimulatory proteins on the T cell and APC surfaces. E) the presence of a superantigen AND binding between co-stimulatory proteins on the T cell and APC surfaces.