Nervous System 04 Autonomic Nervous System-Self Test

Choose one best answer:

1. In the ANS, the preganglionic neurons synapse with postganglionic neurons in the a. autonomic ganglia. b. brain stem. c. spinal cord. d. dorsal root ganglia. e. skeletal muscle cells.

2. The effector organs for the somatic motor nervous system are a. cardiac muscle. b. smooth muscle. c. glands. d. skeletal muscle. e. Skin

3. Cell bodies of the sympathetic preganglionic neurons are located in the a. dorsal horn of the spinal cord gray matter. b. ventral horn of the spinal cord gray matter. c. lateral horn of the spinal cord gray matter. d. sympathetic chain ganglia. e. collateral ganglia.

4. Sympathetic preganglionic axons enter the chain ganglia through the a. gray ramus communicans. b. splanchnic nerve. c. afferent neurons. d. postganglionic neuron. e. white ramus communicans.

5. Which of these characteristics is correct for the parasympathetic division of the ANS? a. preganglionic cell bodies in the brainstem and lateral parts of spinal cord gray matter (S2-S4) b. chain ganglia and collateral ganglia present c. many postganglionic neurons for each preganglionic neuron d. short preganglionic neurons, long postganglionic neurons e. all of these are correct

6. The effect of parasympathetic stimulation on the eye is to ______the ciliary muscle and to ______the pupil. a. contract, constrict b. contract, dilate c. relax, constrict d. relax, dilate

7. Which of these functions is NOT affected by parasympathetic stimulation? a. secretion of tears b. secretion of sweat c. secretion of insulin from the pancreas d. secretion of thin, watery, saliva e. secretion of digestive glands

8. In humans, the release of acetylcholine is responsible for which of the following postganglionic sympathetic responses? a. Activation of sweat glands b. Constriction of cutaneous blood vessels c. Contraction of piloerector muscles d. Decreased gastrointestinal motility e. Increased ventricular contractility

9. All of the following apply to preganglionic neurons of the ANS sympathetic division except a. their cell bodies are located between spinal segments T1 and L2 b. their cell bodies are situated in the lateral gray horns of the spinal cord c. their axons synapse with the peripheral effector organs d. their axons emerge along the ventral roots of the spinal cord between segments T1 and L2 e. some fibers do not synapse until the collateral ganglia

10. Which of the following is one of the major symptoms in patients with Horner’s syndrome? a. pupil dilation b. ptosis c. pale fingers d. cold feet e. megacolon