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WorksheetsIMSPQ F2 - 15 Juni 2025
Total questions: 20
Worksheet time: 10mins
Which characteristic of chemical synapses ensures that nerve impulses are transmitted in a single direction—from the presynaptic neuron to the postsynaptic neuron?
Saltatory conduction
Bidirectional flow of ions
Myelination of axons
One-way conduction
Continuous conduction
Why are chloride ions (Cl⁻) unable to pass through cation-selective ion channels?
Chloride ions are too large to fit through the open channel pore.
Chloride ions are blocked by the positive charges lining the channel.
The cation channel lacks a hydration shell to support anion passage.
The negative charges lining the channel repel chloride ions.
Chloride ions require ATP-driven transport, not passive diffusion.
Which of the following is classified as a class III neurotransmitter (amino acid) found in the nervous system?
Histamine
Acetylcholine
ATP
Norepinephrine
Glycine
Which of the following correctly lists a mechanoreceptor, a nociceptor, and a chemoreceptor, respectively?
Pacinian corpuscle, Ruffini ending, adrenal medulla
Free nerve ending, Meissner’s corpuscle, olfactory bulb
Merkel disc, nociceptive C fibers, pineal gland
Meissner’s corpuscle, muscle spindle, hypothalamic osmoreceptors
Krause’s corpuscle, free nerve ending, aortic and carotid bodies
Which of the following sensory fiber groups is characterized by being unmyelinated?
Group Ia
Group Ib
Group II
Group III
Group IV
Which of the following best describes divergence in a neuronal pool?
Multiple inputs to one neuron
One input to many outputs
One neuron inhibits itself
Lateral inhibition
Recurrent facilitation
Which tactile receptor is less rapidly adapting and responds best to low-frequency vibration?
Meissner’s corpuscle
Pacinian corpuscle
Merkel disc
Free nerve ending
Ruffini ending
Which of the following neurotransmitter pairs are involved in the central analgesia system?
Dopamine and glutamate
Enkephalin and serotonin
Acetylcholine and histamine
Norepinephrine and GABA
Substance P and glutamate
Uneven curvature of the cornea causes light to refract unevenly, leading to visual distortion. This condition is called ______ and is corrected with a ______.
Myopia, concave lens
Hyperopia, convex lens
Astigmatism, cylindrical lens
Presbyopia, bifocal lens
Glaucoma, beta-blocker drops
What is the condition of the eye in which parallel light rays from distant objects are focused exactly on the retina without the need for accommodation?
Myopia
Hyperopia
Astigmatism
Emmetropia
Presbyopia
Which enzyme is responsible for converting all-trans retinal back to 11-cis retinal during the regeneration of rhodopsin?
Rhodopsin kinase
Retinal reductase
Retinal isomerase
Transducin
Opsinase
Which type of retinal ganglion cells has small receptive fields due to limited dendritic spread, allowing them to transmit fine details of visual images?
W cells
Y cells
M cells
P cells
X cells
In the dorsal lateral geniculate nucleus, layers III through VI are known as which of the following?
Magnocellular layers
Retinotopic layers
Parvocellular layers
Koniocellular layers
Corticogeniculate layers
Which extraocular muscles are primarily responsible for moving the eyes from side to side?
Superior rectus and inferior rectus
Medial and lateral recti
Superior oblique and inferior oblique
Orbicularis oculi and levator palpebrae
Ciliary and suspensory muscles
Which structure is controlled by parasympathetic nerves to adjust the lens for near vision by changing its shape?
Lateral rectus
Dilator pupillae
Ciliary muscle
Superior oblique
Suspensory ligament
When light is directed into the eye, the pupil constricts in response. What is this reflex called?
Accommodation reflex
Pupillary light reflex
Corneal blink reflex
Vestibulo-ocular reflex
Consensual response
Which membrane vibrates to move hair cells against the tectorial membrane in hearing?
Tympanic membrane
Reissner’s membrane
Oval window
Basilar membrane
Round window
What is the function of the ossicles in the middle ear?
Produce earwax
Transmit vibrations from the eardrum to the inner ear
Equalize air pressure
Detect head rotation
Filter high-frequency sounds
What fluid fills the scala media of the cochlea?
Perilymph
Endolymph
Cerebrospinal fluid
Plasma
Aqueous humor
After synapsing in the cochlear nuclei, where do most second-order auditory neurons project next?
Inferior colliculus
Medial geniculate body
Superior olivary nucleus
Auditory cortex
Vestibular nuclei
