In the newborn or young infant, five behavioral states are defined on the basis of direct behavioral observations, sometimes accompanied by noninvasive physical measures like heart rate and motor activity. Which is NOT any of these states?
-quiet sleep
-REM sleep
-Active alertness
-quiet alertness
REM sleep
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What is the primary function of the transverse tubules?
A. Conduct action potentials from the surface of the muscle fiber to internal regions near myofibrils. B. Act as a channel for Ca2+ ions during excitation-contraction coupling. C. Form cross-bridges between actin and myosin during muscle contraction. D. Attach troponin to tropomyosin. E. Attach muscle fibers to skeletal elements to exert force.
What prompted Darwin to publish his book decades after he began writing it?
A) He had completed the last of his experiments. B) He had returned from his voyage around the world. C) A colleague (Alfred Wallace) was about to publish a similar manuscript. D) After years of searching, he finally found a publisher willing to accept it.
Scientists use shared biological components to determine relationships among the three domains of life. What is an example of an organelle used for this purpose?
What will be an ideal response?
A chemical reaction in which a water molecule is a reactant is known as a (dehydration/hydrolysis) reaction
What will be an ideal response?