Summarize the major function of each division of the nervous system
What will be an ideal response?
The nervous system is divided into the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS), which includes nerves that conduct impulses to and from the CNS. The PNS is subdivided into an afferent (sensory) division that includes sensory receptors and neurons that conduct impulses to the CNS, and an efferent (motor) division that delivers impulses to effector organs (muscles and glands). The efferent division includes a somatic nervous system, which stimulates only skeletal muscles, and an autonomic nervous system (ANS), which stimulates organs under involuntary control (heart, smooth muscle, and glands). The ANS includes the sympathetic, parasympathetic, and enteric divisions. The enteric division affects only digestive organs, whereas the sympathetic and parasympathetic divisions affect digestive organs and all other effectors under involuntary control of the nervous system.
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A. long-term changes. B. unstable conditions. C. stable conditions around a set point. D. changes returning values toward a set point.
Cholesterol is absorbed without being digested into smaller pieces. How does this compare to absorption of carbohydrates and proteins? What characteristic of cholesterol suggests it would be transported by simple diffusion? What is the evidence that transport proteins are involved in cholesterol absorption? Does this discovery rule out transport by simple diffusion? Explain.
What will be an ideal response?
Accommodation permits near vision
Indicate whether the statement is true or false
Bile is secreted by the liver and is stored in the gallbladder
Indicate whether the statement is true or false