The gallbladder ________.
A. breaks down red blood cells
B. is attached to the pancreas
C. produces bile
D. produces secretin
E. stores bile
Answer: E
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The rough endoplasmic reticulum
a. is studded with ribosomes. b. synthesizes proteins for export from the cell or for use in construction of a new cellular membrane. c. is continuous with the smooth endoplasmic reticulum. d. is connected to the nucleus. e. all of these answers.
A neurotransmitter that increases the permeability for sodium in a postsynaptic neuron causes
A) no changes in the resting potential. B) damage to the myelin sheath. C) excitatory postsynaptic potentials. D) an alteration of the membrane threshold
Light is a crucial factor in regulating circadian rhythms
Indicate whether the statement is true or false
Hormones
a. are all of similar chemical composition. b. combine with specific receptors on the target cell's surface or inside the target cell. c. are secreted at a constant rate. d. are also known as paracrines e. all of these answers.