Answer : (c)

Carotene is the source of retinal which is involved in formation of rhodopsin of rod cells. Retinal, a derivative of vitamin A, is the light-absorbing part of all visual photo pigments. Answer:(a)

The organ of Corti is a specialized sensory epithelium that allows for the transduction of sound vibrations into neural signals. The cochlea (auditory inner ear) transforms the sound in neural message. The function of the cochlea is to transform the vibrations of the cochlear liquids and associated structures into a neural signal The vestibular system, one portion of the membraneous labyrinth of the inner ear, is a collection of structures that provide you with your sense of balance and an awareness of your spatial orientation. The tectorial membrane (TM) is an extracellular connective tissue that covers the mechanically-sensitive hair bundles of the sensory receptor cells in the inner ear. Answer:(c)

Cerebrum performs higher functions like interpreting touch, vision and hearing, as well as speech, reasoning, emotions, learning, and fine control of movement Option (a) correct pairing homeostatic dynamic state of equilibrium is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, The medulla oblongata helps regulate breathing, heart and blood vessel function, for temperature and fluid balance Option (b) correct pairing The cerebellum coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity.Option (c) incorrect pairing The primary function of the corpus callosum is to integrate motor, sensory, and cognitive performances between the cerebral cortex on one side of the brain to the same region on the other side. Option (d) correct pairing Answer:(c)

The photosensitive pigment Rhodopsin of the human eye is made up of opsin and Retinal ( the aldehyde form of vitamin-A/ Retinol) Answer:(b)

A – Receptor B – Synaptic cleft C – Synaptic vesicles D – Ca++ Answer:(a)

A – Retina B – Blind spot C – Aqueous chamber D – Sclera Answer:(a)

Graded potentials are primarily generated by sensory input, causing a change in the conductance of the membrane of the sensory receptor cell. Option (b) is not correct Nociception is the sensory process that provides the signals that lead to pain. This occurs through nociceptors, primary sensory neurons that are activated by stimuli that cause tissue damage. Stimuli can include tissue injury, extremes of heat and noxious chemicals. Option (c) is not correct Meissner's corpuscles; discovered by anatomist Georg Meissner (1829–1905) and Rudolf Wagner) are a type of mechanoreceptor. They are a type of nerve ending in the skin that is responsible for sensitivity to light touch. Option (d) is not correct Answer:(a)

Carotene is the source of retinal which is involved in formation of rhodopsin of rod cells. Retinal, a derivative of vitamin A, is the light-absorbing part of all visual photopigments. Answer:(b)

Pre-synaptic membrane is involved in the release of neurotransmitter in the chemical synapse. The receptors sites for neurotransmitters are present on post-synaptic membrane. Answer:(d)

At the posterior pole of the eye lateral to the blind spot, there is a yellowish pigmented spot called macula lutea with a central pit called the fovea. It is a thinned-out portion of the retina where only the cones are densely packed. It is the point where the visual acuity (resolution) is the highest. Answer:(b)

The anterior grey column is the column where the cell bodies of alpha motor neurons are located. which is the front column of grey matter in the spinal cord contains motor neurons that affect the axial muscles anterior horn cells (also called anterior grey column) Destruction of the anterior horn cells of the spinal cord would result in loss of voluntary motor impulses. Answer:(c)

The transparent lens in the human eye is held in its place with the help of suspensory ligaments of the lens attached to the ciliary body which is a ring of fibrus tissues Answer : (a)

The medulla oblongata helps regulate breathing, heart and blood vessel function, digestion, sneezing, and swallowing. limbic system are involved in motivation, emotion, learning, and memory. pairing is not correct The hypothalamus controls body temperature, hunger, important aspects of parenting and attachment behaviours, thirst, fatigue, sleep, and circadian rhythms. The primary function of the corpus callosum is to integrate motor, sensory, and cognitive performances between the cerebral cortex on one side of the brain to the same region on the other side. Answer : (b)