Nervous System
The visual pathway is best characterised by which of the following neural elements?
Eye lens, retinal ganglion cells, optic radiation, optic chiasma, primary visual cortex
Optic nerves, decussation of pyramids, nucleus pallidus, optic radiation, primary visual cortex
Retina, optic nerves, primary visual cortex, optic radiation, postcentral gyrus
Optic nerves, optic chiasma, lateral geniculate nucleus, optic radiation, primary visual cortex
Optic nerves, optic chiasma, lateral geniculate nucleus, optic radiation, primary visual cortex
The pathway begins at the photoreceptors, so the eye lens is not included. The decussation of pyramids and postcentral gyrus are not part of the visual pathway.
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In the spinal cord, the ascending tracts contain:A. White matter and transmit sensory information
B. White matter and transmit motor commands
C. Grey matter and transmit sensory information
D. Grey matter and transmit motor commands
Which sequence of ion movements describes the action potential?
A. Na+ move out of cell then K+ move in
B. K+ move in to cell then Na+ move out
C. K+ move out of cell then Na+ move in
D. Na+ move into cell then K+ move out
Which of the following substances is prevented from entering the brain by the blood-brain barrier?
A. Glucose
B. Nicotine
C. Pharmaceuticals
D. Alcohol
There are three ossicles in the middle ear. What are their names?
A. Malleus, stapedius, otolith
B. Cochlea, stapes, incus
C. Stapedius, ampulla, cochlea
D. Malleus, stapes, incus
The inner ear (or internal ear) may be described as a series of tubes. What are the tubes filled with?
A. Air
B. Perilymph
C. Endolymph
D. Perilymph and endolymph
What characterises a spinal reflex?
A. It involves rapid processing by the brain and a predictable response.
B. It is a predictable, unlearned and involuntary motor response.
C. It is a rapid, predictable, learned and involuntary motor response.
D. It involves stimulation of a motor neurone by a sensory neurone that originates within the CNS.
A multipolar neuron has more than one of what?
A. Dendrite attached to the cell body
B. Axon attached to the cell body
C. Synaptic terminal attached to the axon
D. Cell body
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