_________are specialized neurons that send signals to the ________ to regulate the body’s temperature. 1. Thermoreceptors; hypothalamus 2. Microglia; midbrain 3. Thermoreceptors; spinal cord 4. Neurons; hypothalamus 5. Thermoreceptors; pons
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With respect to thermoregulation, put the following into the correct order with respect to detection of a stimulus and resultant response: Thermoreceptors detect an increase in body temperature. Signals from thermoreceptors are received by the hypothalamus. The hypothalamus sends out signals to the body to cause behavioral and physiological changes. Animal experiences vasodilation, sweating, and will likely move into the shade, all in an effort to decrease body temperature. Body temperature of an animal increases due to increased sun exposure and hot temperatures.
Caryl A.
23. Regarding the posterior columns, our perception of a given sensation as touch, rather than as temperature or pain, depends on ________. A) processing in the thalamus B) the type of lower motor neurons involved C) the first-order neurons that integrate the information at the spinal cord D) whether or not the axons decussate a second time within the cerebellum E) the number of sensory receptors the affected region contains in the primary sensory cortex 24. The corticospinal tracts that synapse on motor neurons in the anterior gray horns of the spinal cord are visible as they descend along the ventral surface of the medulla as a pair of thick bands, the ________. A) olives B) reticular formation C) pyramids D) medial lemniscus E) peduncles 26. Several centers (and their associated motor tracts) in the cerebrum, diencephalon, and brainstem, which may issue somatic motor commands as a result of processing performed at a subconscious level, were long known as the ________, but is actually now considered inaccurate and misleading. A) medial lemniscus B) pyramidal system C) anterolateral system D) reticular formation E) extrapyramidal system 31. All the levels of somatic motor control affect the activity of (the) ________. A) thalamus B) third-order neurons C) lower motor neurons D) medulla oblongata E) upper motor neurons
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In homeostatic regulation of body temperature: Shivering helps to rid the body of excess heat. Positive feedback keeps the body temperature near the set point. The homeostatic sensor for regulating body temperature is found in the hypothalamus. Humans are classified as ectothermic. Sending more blood to the liver helps to cool the body. In a thin section through brain tissue, you see a cell that is wrapped around the axon of a neuron, forming concentric layers of plasma membrane. This cell most likely: a. A Schwann Cell b. supplies nutrients to neurons c. gives structural support to the axon d. insulates the axon for rapid conduction of action potentials e. recycles neurotransmitter in the synapses.
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