If a stimulus, several times greater than the threshold stimulus is provided to a muscle fibre, it will

• contract with a larger force

• contract with a smaller force

• contract with the same force

• undergo tetany.

Sella Turcica is found

• in bones

• in joints

• nearby pituitary

• nearby thyroid

Which of the following statement is wrong regarding conduction of nerve impulse?

• In a resting neuron, the axonal membrane is more permeable to K⁺ ions and nearly impermeable to Na⁺ ions.

• Fluid outside the axon has a high concentration of Na⁺ and low concentration of K⁺, in a resting neuron

• Ionic gradients are maintained by Na-K pumps across the resting membrane, which transport 3 Na⁺ ions outwards for 2K⁺ ions into the cell.

• Resting potential is the electrical potential difference across the resting membrane

• Resting potential is the electrical potential difference across the resting membrane

The yellowish pigmented spot at the posterior pole of the human eye lateral to the blind spot is

• crista

• saccule

• iris

• meatus

• meatus

The body temperature regulatory centre in the brain is

• cerebellum

• corpus callosum

• hypothalamus

• hippocampus

• hippocampus

The anterior portion of the sclera is called

• Lens

• Iris

• Pupil

• Ciliary body

• Ciliary body

The projecting ridge in ampulla of semi-circular canals in ear is called

• Succus entericus

• Maccula

• Otolith

• Crista ampullaris

• Crista ampullaris

338.

Choose the wrong statement regarding human ear

• The stapes is attached to the tympanic membrane

• The Eustachian tube connects the middle ear cavity with the pharynx

• The middle ear contains three ossicles

• The space within the cochlea called scala media is filled with Endolymph

• The space within the cochlea called scala media is filled with Endolymph

Anaerobic breakdown of glycogen due to repeated activation of muscles leads to the accumulation of

• uric acid

• phenylalanine

• lactic acid

• glutamic acid

• glutamic acid

Large number of processes that project from the apical part of each hair cell of the organ of Corti is called

• Otolith organ

• Stereocilia

• Crista ampullaris

• Utricle

• Utricle