Umar Draz, Author at DocMCQs

A neural impulse is initiated when a neuron’s charge momentarily becomes less negative, or even positive. This event is called:

A. An action potential

B. A resting potential

C. Impulse facilitation

D. Inhibitory

Correct answer is: A. An action potential

Neurons convey information about the strength of stimuli by varying:

A. The size of their action potentials

B. The speed of their action potentials

C. The rate at which they fire action potentials

D. All of the above

Correct answer is: C. The rate at which they fire action potentials

Alterations in activity at dopamine synapses have been implicated in the development of:

A. Anxiety

B. Schizophrenia

C. Alzheimer’s disease

D. Nicotine addiction

Correct answer is: B. Schizophrenia

Jim just barely avoided a head-on collision on a narrow road. With heart pounding, hands shaking, and body perspiring, Jim recognizes that these are signs of the body’s fight or flight response, which is controlled by the:

A. Empathetic division of the peripheral nervous system

B. Parasympathetic division of the autonomic nervous system

C. Somatic division of the peripheral nervous system

D. Sympathetic division of the autonomic nervous system

Correct answer is: D. Sympathetic division of the autonomic nervous system

The hindbrain consists of:

A. Endocrine system and the limbic system

B. Reticular formation

C. Thalamus, the hypothalamus, and the cerebrum

D. Cerebellum, the medulla, and the pons

Correct answer is: D. Cerebellum, the medulla, and the pons

The thalamus can be characterized as:

A. A regulatory mechanism

B. The consciousness switch of the brain

C. A relay system

D. A bridge between the two cerebral hemispheres

Correct answer is: C. A relay system

The scientist who won a Nobel prize for his work with split-brain patients is:

A. Walter Cannon

B. Paul Broca

C. Roger Sperry

D. James Olds

Correct answer is: B. Paul Broca

Sounds presented to the right ear are registered:

A. Only in the right hemisphere

B. Only in the left hemisphere

C. More quickly in the right hemisphere

D. More quickly in the left hemisphere

Correct answer is: C. More quickly in the right hemisphere

In people whose corpus callosums have not been severed, verbal stimuli are identified more quickly and more accurately:

A. When sent to the right hemisphere first

B. When sent to the left hemisphere first

C. When presented to the left visual field

D. When presented auditorily rather than visually

Correct answer is: D. When presented auditorily rather than visually

Hormones are to the endocrine system as _____ are to the nervous system:

A. Nerves

B. Synapses

C. Neurotransmitters

D. Action potentials

Correct answer is: B. Synapses

Author name: Umar Draz