Neural Control and Coordination · Question 32

Which part of the human ear plays no role in hearing as such but is otherwise very much required?

1. Eustachian tube
2. Organ of Corti
3. Vestibular apparatus
4. Ear ossicles

When a neuron is in resting state i.e., not conducting any impulse, the axonal membrane is

1. comparatively more permeable to Na+ ions and nearly impermeable to K+ ions
2. equally permeable to both Na+ and K+ ions
3. impermeable to both Na+ and K+ ions
4. comparatively more permeable to K+ ions and nearly impermeable to Na+ ions.

The purplish red pigment rhodopsin contained in the rod type of photoreceptor cells of the human eye, is a derivative of

1. vitamin B1
2. vitamin C
3. vitamin D
4. vitamin A

Select the answer with correct matching of the structure, its location and function.

1. array|l|l|l| Structure & Location & Function \ Eustachian tube & Anterior part of internal ear & Equalises air pressure on either side of tympanic membrane \ array
2. array|l|l|l| Structure & Location & Function \ Cerebellum & Midbrain & Controls respiration and gastric secretions \ array
3. array|l|l|l| Structure & Location & Function \ Hypothalamus & Forebrain & Controls body temperature, urge for eating and drinking \ array
4. array|l|l|l| Structure & Location & Function \ Blind spot & Near the place where optic nerve leaves the eye & Rods and cones are present but inactive here \ array

The nerve centres which control the body temperature and the urge for eating are contained in

1. hypothalamus
2. pons
3. cerebellum
4. thalamus

Alzheimer's disease in humans is associated with the deficiency of

1. glutamic acid
2. acetylcholine
3. gamma aminobutyric acid (GABA)
4. dopamine.

Which part of human brain is concerned with the regulation of body temperature?

1. Cerebellum
2. Cerebrum
3. Hypothalamus
4. Medulla oblongata

During the propagation of a nerve impulse, the action potential results from the movement of

1. K+ ions from intracellular fluid to extracellular fluid
2. Na+ ions from extracellular fluid to intracellular fluid
3. K+ ions from extracellular fluid to intracellular fluid
4. Na+ ions from intracellular fluid to extracellular fluid

Given below is a diagrammatic cross section of a single loop of human cochlea. [Figure] Which one of the following options correctly represents the names of three different parts?

1. B : Tectorial membrane, C : Perilymph, D : Secretory cells
2. A : Perilymph, B : Tectorial membrane, C : Endolymph
3. C : Endolymph, D : Sensory hair cells, A : Serum
4. D : Sensory hair cells, A : Endolymph, B : Tectorial membrane

Cornea transplant in humans is almost never rejected. This is because

1. it is composed of enucleated cells
2. it is a non-living layer
3. its cells are least penetrable by bacteria
4. it has no blood supply