Nervous System: Our body's command center

This is an MCQ-based quiz for GRE on the topic of Nervous Systems.

It has three parts: The sympathetic nervous system, The parasympathetic nervous system, and The enteric nervous system. It controls your movements, thoughts, and automatic responses to the world around you. It also controls other body systems and processes, such as digestion, breathing, and sexual development (puberty).

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An individual presents to his physician with an abnormal breathing rhythm. The physician suspects that the problem may be originating from his brain. What part of his brain is most likely not functioning properly?

Midbrain Hippocampus Hypothalamus Cerebellum Medulla oblongata

Which portion of the neuron receives electrical signals from other neurons?

Dendrites Cell body Axon hillock Axons

Which of the following is true of spinal nerves coming off of the spinal cord?

They do not innervate skeletal muscles. They do not contain autonomic neuron axons going to organs. They contain a mixture of motor and sensory neuron axons. They carry motor neuron axons only.

Which response would be expected from parasympathetic nervous system activity?

Increased heart rate Relaxation of bronchial smooth muscle Pupil dilation Accommodation of the eye lens for near vision Contraction of the urethral sphincter

The relaxation of bronchial smooth muscle is stimulated by what type of neuron?

Sympathetic postganglionic neurons Parasympathetic postganglionic neurons Parasympathetic motor neurons Sympathetic preganglionic neurons Somatic motor neurons

What is the name of the support cell in the nervous system responsible for circulating cerebrospinal fluid?

Ependymal cells Astrocytes Microglia Schwann cells

Which portion of the brain is responsible for controlling breathing and heart rate?

Cerebellum Brain stem Cerebrum Hypothalamus

Which of the following is one of the parts of the hindbrain?

Hypothalamus

Cerebellum

Corpus callosum

Spinal cord

Which of the following is most closely linked to neuron hyperpolarization?

A membrane potential of –65mV Potassium efflux Absolute refractory period Sodium influx

If there is an injury in the hypothalamus region of the brain, it is most likely to affect