17475.Which one of the following cranial nerves is carrying the nerve fibres originating from the Edinger-Westphal nucleus?
Oculomotor
Trochlear
Abducens
Vagus
17476.Skeletal muscles are controlled by ______.
Sympathetic nerves
Parasympathetic nerves
Somatic nerves
Autonomic nerves
17477.Which one of the followings is not correct about neuroglial cells?
Generate or transmit impulses
Maintain healthy concentrations of important chemicals in the fluid
Provide physical support and protection to neurons
In PNS, responsible for myelination (Schwann cells)
17478.Which one of the following aspects is an exclusive characteristic of living things?
Perception of events happening in the environment and their memory
Increase in mass by accumulation of material both on surface as well as internally
Isolated metabolic reactions occur in vitro
Increase in mass from inside only
17479.Given below is a diagrammatic cross section of a single loop of human cochlea:
Which one of the following options correctly represents the names of three different parts?
Which one of the following options correctly represents the names of three different parts?
A: Perilymph, B: Tectorial membrane C: Endolymph
B: Tectorial membrane, C: Perilymph, D: Secretory cells
C: Endolymph, D: Sensory hair cells, A: Serum
D: Sensory hair cells, A: Endolymph B: Tectorial membrane
17480.During the propagation of a nerve impulse, the action potential results from the movement of
Na+ ions from extracellular fluid to intracellular fluid
K+ ions from extracellular fluid to intracellular fluid
Na+ ions from intracellular fluid to extracellular fluid
K+ ions from intracellular fluid to extracellular fluid
17481.
Examine the diagram of the two cell types A and B given below and select the correct option.
Cell-A is the rod cell found evenly all over retina
Cell-A is the cone cell more concentrated in the fovea centralis
Cell-B is concerned with colour vision in bright light
Cell-A is sensitive to low light intensities
17482.In the PNS, the neuroglial cells that form protective myelin sheaths are ______.
Microglia
Ganglionic cells
Oligodendrocytes
Schwann cells
17483.Patients suffering from cholera are given a saline drip because
NaCl is an important component of energy supply
NaCl furnishes most of the fuel required for cellular activity
Na+ ions help in stopping nerve impulses and hence, sensation of pain
Na+ ions help in the retention of water in the body tissues
17484.At a neuromuscular junction, synaptic vesicles discharge ______.
Acetylcholine
Epinephrine
Adrenaline
None of these