Neural Control and Coordination Test - 75

Eye is the structural organ located in the orbit of the skull. The outermost layer that covers eye is called sclerotic layer or sclera. It is the white fibrous part that with cornea protects the eyeball. 

The human sympathetic nervous system controls the functions (for example accelerated heartbeat, reduced digestion rate etc) that help prepare the organism for the physical strain which is required to escape from a dangerous situation.

The temporal lobe is the lateral portion of the cerebral hemisphere, wherein primary auditory area and auditory association area, responsible for hearing are located. 

Acetylcholine is the main vagal neurotransmitter. The vagus nerve controls the heart rate by electrical impulses to the SA node of the heart in which acetylcholine release slows down the pulse rate and decreases the blood pressure. Thus the correct answer is option A.

The inner ear consists of two systems of canals which are namely cochlea and vestibular apparatus. Organ of Corti is located in the middle cochlear canal and has hair cells (mechanoreceptors) on its basilar membrane. 

Nerve net found in many cnidarians is a part of more advanced nervous systems. Cytoplasmic processes join the nerve cells (neurons) of nerve nets. In cnidarians, the neurons are joined to epithelial receptors and to contractile cells. In vertebrates, nerve nets may be found around blood vessels and the alimentary tract. The nerve net is the simplest form of a nervous system found in multicellular organisms. Unlike, central nervous systems where neurons are typically grouped together, neurons found in nerve nets are found spread apart. This nervous system allows cnidarians to respond to physical contact. They can detect food and other chemicals in a rudimentary way. While the nerve net allows the organism to respond to its environment, it does not serve as a means by which the organism can detect the source of the stimulus. For this reason, simple animals with nerve nets, such as Hydra, will typically produce the same motor output in response to contact with a stimulus regardless of the point of contact. 

The conjunctiva is the thin film composed of non-keratinized stratified columnar epithelium and goblet cells that line the inside of the eyelids and covers the white of the eye called as the sclera. The conjunctiva lubricates the produces mucus and tears in small amounts to lubricate the eye and also prevents the entry of microbes into the eye.
Therefore, the correct answer is option C.

The central nervous system (CNS) includes brain and spinal cord. It integrates and stores the sensory information from external and internal sense organs and commands different organs to respond accordingly.