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1. Which of the following best describes the autonomic nervous system?
- involuntary, input from internal receptors, output to smooth muscle and glands
- involuntary, input from sensory receptors, output to skeletal muscles
- voluntary, input from sensory receptors, output to skeletal muscles
- voluntary, input from internal receptors, output to smooth muscle and glands
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2. What part of a neuron carries impulses towards from the cell body?
- Dendrites
- Myelin sheath
- Axons
- Schwann cells
3. During ventricular systole and atrial diastole:
- semilunar and aortic valves close
- semilunar valves open, aortic valves close
- semilunar and aortic valves open
- aortic valves open, semilunar valves close
4. During inhalation, the _____________ move the ribs upwards and outwards and the volume of the thoracic cavity is increased.
- External intercostal muscles
- Internal intercostal muscles
5. When ADH is low, the collecting duct is:
- more permeable to water and a large volume of urine is produced
- less permeable to water and a large volume of urine is produced
- less permeable to water and a small volume of urine is produced
- more permeable to water and a small volume of urine is produced
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