Vetebrate brain differentiates from

• Endoderm

• Mesoderm

• Ectoderm

• Blastoderm

'Adaptation' of eyes in dark is due to

• depletionof vision pigment in rods

• depletion of vision pigment in cones

• repletion of vision pigment in rods

• repletion of vision pigment in cones

Sympathetic nervous system induces

• Heartbeat

• Secretion of digestive juice

• Secretion of saliva

• All of the above

Which cranial nerve has the highest number of branches?

• Facial nerve

• Trigeminal

• Vagus nerve

• None of these

In parasympathetic nervous system, which of the following is released?

• Epinephrine

• Norepinephrine

• Serotonin

• Acetylcholine

The junction between the axon of one neuron and the dendrite of the next is called

• Junction point

• A synapse

• A joint

• Constant bridge

If the threshold for hearing increasing 1000 times, the hearing loss is

• 40 decibels

• 50 decibels

•  60 decibels

• None of these

Parkinsonism is related with

• Brain

• Spinal Nerve

• Cranial Nerves

• All of these

Human ear ossicles are

• incus and stapes

• stapes

• incus, malleus and stapes

• incus and malleus

Which of the following is important for muscle contraction and nerve impulse transmission?

• Ca²⁺ ions

• Ca²⁺ and Mg²⁺ ions

• Mg²⁺ ions

• Fe²⁺ ions