The thin outer layer (1 to 2 mm thick) of each hemisphere of the brain that serves to increase the surface area by being arranged in a folded manner is called the ________
Fill in the blank(s) with correct word
cerebral cortex
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Which of the following is the motor endplate?
A. the terminal membrane of the motor neuron where neurotransmitter is released B. the portion of the membrane of the muscle cell that has receptors that respond to the neurotransmitter released by the motor neuron. C. the membrane of the sarcoplasmic reticulum where calcium is stored D. the Z disc where two sarcomeres adjoin
In the absence of retroviruses, eukaryotes may also undergo reverse transcription if which of the following is present?
A) Alu B) retrograde viruses C) retrotransposons D) prions E) none of the above
What did Richard Axel and Linda Buck discover about the way in which we are able to perceive many different types of odors?
A. Many different types of odors bind to just a few different types of receptor molecules. B. Vertebrate animals make a large number of distinct types of receptor proteins, each of which binds a particular odorant molecule or small group of such molecules. C. Odors are distinguished by the way in which they bind both olfactory and taste receptors—it is the overall "picture" generated this way that we perceive. D. None of these choices are correct.
Helicobacter pylori uses the enzyme urease to counteract a chemical defense in the human organ in which it lives. This chemical defense is
a. lysozyme. b. hydrochloric acid. c. superoxide radicals. d. sebum. e. complement.