Temporal summation is a response to the:
A. location of synapses over the surface of a
postsynaptic neuron.
B. frequency of stimulation of a postsynaptic
cell.
C. amount of neurotransmitter released from
a presynaptic cell.
D. density of ligand-gated channels on the
postsynaptic cell.
B
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Answer the following statements true (T) or false (F)
1. All infectious diseases are caused by pathogens. 2. Pathogens greatly outnumber nonpathogens. 3. Using microorganisms to clean up the environment is known as bioremediation. 4. Microorganisms are essential in the field of genetic engineering. 5. Microorganisms probably appeared on earth about 3.5 million years ago.
If a child has an AB blood type, the parents
a. must both have different blood types. b. must be A and B, but not AB. c. must both be AB. d. can be any blood type. e. can have different blood types, but neither can be blood type O.
Application of synthetic gibberellins improves the
quality and marketability of a. oranges. b. grapes. c. celery. d. cabbage. e. all of these.
Order the following statements to correctly describe the route of secreted protein as it is synthesized and secreted from a eukaryotic cell.1. Translation begins on a ribosome.2. The ribosome attaches to the rough endoplasmic reticulum and the newly formed polypeptide is pushed into the lumen of the rough ER.3. The protein folds and undergoes modification within the rough ER.4. The protein travels within a membranous vesicle from the ER to the cis face of the Golgi apparatus.5. The protein travels toward the trans face of the Golgi, from which it is packaged into a secretory vesicle.6. The secretory vesicle travels to and merges with the cell membrane, releasing its contents outside of the cell.
Fill in the blank(s) with the appropriate word(s).