Explain why you move your hand from hot stimuli before you register pain
What will be an ideal response?
ANSWER: In a reflex, the afferent neuron carries the information about the hot surface to the spinal
cord, where it makes a direct connection with the motor neuron that moves your hand away. The information that makes you aware of the hot surface is processed in your
somatosensory cortex. Here, a connection between the spinal cord and an interneuron
sends the information to the thalamus; therefore, at least one or two extra synapses are
required for you to "know" that your hand is touching something hot than it takes for the
reflex to move your hand away.
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Hot sulfur-rich environments associated with terrestrial sulfur-rich springs are called
A) acid-mine drainage. B) hydrothermal vents. C) solfataras. D) terrestrial volcanoes.
Why is it thought that homeotic genes arose very early in the evolution of animals?
What will be an ideal response?
What would result if too many cells left the surface of the embryo to move inside during gastruation?
A. Too little endoderm, resulting in missing gut and organs B. Too little ectoderm, resulting in missing nervous system or skin C. Problems in muscle development D. Too little protoderm, resulting in missing organs Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the fate of the surface cells? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Why is ATP needed for muscle contraction?
A) It's needed for calcium release from the sarcoplasmic reticulum. B) Myosin must contact the actin filament and move to pull it toward the midline of the sarcomere. C) It causes calcium to bind to troponin. D) It causes tropomyosin to slide off the myosin-binding sites of actin.