Neural control and coordination practice · Hard

The vagus nerve is the cranial nerve numbering:

Myelin sheath is produced by $\underline{X}$ in CNS and $\underline{Y}$ in PNS. Choose the option that fill the blanks correctly

Meniere's disease is associated with

Bipolar neurons are found in human ______

The far point of a near sighted person is $6.0 \mathrm{~m}$ from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is $18.0 \mathrm{~m}$ away and 2.0 high. How high is the image formed by the contacts?

The shape of eye lens is changed by

How many of the following statements are correct

(i) Photoreceptors in the human eye are depolarised during darkness

(ii) Receptors produce graded potentials

(iii) Retinal is a light absorbing part of all the visual photopigments

(iv) Photopigments are embeded in the membrane discs of the outer segment

The crystal of lead zirconate is a key component of:

The function of Eustachian tube is to equalise pressure on either side of

Which of the following is not a mental disorder?

The centres which control respiration, cardiovascular reflexes and gastric secretions lies in

Sensory ganglion concerned with spinal reflex is found in

X is called master of master endocrine gland. It lies at the base of the thalamus.
Identify X and select the correct option w.r.t it.

Arrange the following events in a correct order that lead to the formation of an auditory impulse in human ears from the codes given below
I. Vibration is transferred from the malleus to the incus and then to stapes
II. Basiliar membrane moves up and down
III. Nerve impulse is transmitted by cochlear nerve to auditory cortex of brain for impulse analysis and recognition
IV. Sound waves pass through ear canal
V. Stereocilia of hair cells of organ of Corti rub against tectorial membrane
VI. Sound waves causes ear drum to vibrate
VII. Nerve impulse is generated
VIII. Vibrations move from fluid of vestibular canal to the fluid tymapanic canal
IX. Membrane at oval window vibrates
Codes

The cranial nerves which originate from the medulla oblongata are

How much volume of neural tissue in our body is contributed by neuroglia?

Assertion: Injury and breakage of medulla can cause death of a person

Reason: Medulla has pneumotaxic cantre for respiration.

Which of the following is correct for pupil of human eye?

I. It is the aperture surrounded by the iris

II. The diameter of pupil is regulated by muscle fibres of iris

III. It is a transparent crystalline structure attached to the ciliary body
The correct option is

Otorhinolaryngology is the study of :

Which of the following is an eye disease?

A wave of action potential is termed as

[A]: Ear muscles of external ear in man are well developed.

[R]: These muscles do not move external ear freely to detect sound.

Myelinated nerve fibre is found in

Read the following statements

(A) Depolarization of an axonal membrane is caused due to rise in stimulus-induced permeability to ${Na}^{+}$and its rapid influx into axoplasm.

(B) Diffusion of ${K}^{+}$outside the axonal membrane restores the resting potential of the membrane.

(C) Sodium potassium pump maintains active transport of $2 {Na}^{+}$outwards for $3 {~K}^{+}$into axoplasm across resting membrane

Choose the option that represent correct statements only

While travelling to higher altitudes, people can feel pain in the ear and dizziness. Which part, among the following is involved?

A neural signal reaching neuromuscular junction release a neurotransmitter namely.

Glucose and oxygen are required by brain for constant supply of energy to control the functions of our body organs.
What will be the consequences if brain is deprived of oxygen and glucose?
I. Brain deprived of oxygen for just 5 minutes will get permanently damaged
II. Glucose is important in the nerve impulse conduction
III. One side of brain is unable to know, what the other side is doing, when it is deprived of oxygen
IV. Mental confusion will results if brain is deprived of glucose

Parkinsonism is related with

Read the following statements w.r.t. Knee-jerk reflex and choose the correct answer.
(A) Interneuron initiates impulse in one or more motor or efferent neurons.
(B) Reflex pathway comprises of at least one afferent neuron and one efferent neuron

Schneiderian and tympanic membranes respectively belongs to