Which membranes line the passageways that open to the exterior of the body, including those of the respiratory, digestive, reproductive, and urinary systems in the body?
A) cutaneous
B) basement
C) mucous
D) serous
C
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Which functional group forms covalent bonds and contributes to tertiary structure of proteins?
A. NH2 B. COOH C. PO4 D. SH E. OH
Base your answers to the questions below on the following information:
Using the patch clamp technique, a researcher measures a single channel in a membrane. The receptor channel passes 3 pA (picoamperes) of ionic current over a period of 8 msec at -60 mV; 1 pA = 10 -12 ampere. Based on your knowledge of nerve transmission, this movement of ions will A) stimulate a change in a postsynaptic membrane. B) not stimulate a change in a postsynaptic membrane. C) stimulate a change in a postsynaptic membrane if three channel events are combined. D) stimulate a change in a postsynaptic membrane if 50 channel events are combined. E) generate a current resulting in membrane depolarization.
Eye drops used by an ophthalmologist to dilate the eyes for an eye exam act on the nerves that control the ____
a. fovea b. lens c. ciliary muscle d. cornea e. iris
The Calvin-Benson cycle starts when ____
a. light is available c. electrons leave a photosystem II b. carbon dioxide is attached to RuBP