Neural Control and Coordination Test - 23

Nissl bodies are large granular bodies, that stain with basic dyes, forming the reticular substance of the cytoplasm of neurons, composed of rough endoplasmic reticulum and free polyribosomes. It is the site of protein synthesis in neurons.

The 'frons' are the area of the face below the top two 'ocelli' and above the 'frontoclypeal sulcus' and in between the two 'frontogenal sulci', it supports the 'pharyngeal dilator' muscles and in immature forms it bears the lower two arms of the ecdysial cleavage lines. Thus, option B is correct.

The corpus callosum is a major commissural fibre system in the human brain. This system is the largest connective structure in the brain, consisting of about 200-300 million axons, that connect the two cerebral hemispheres.

Cerebrum forms the major part of the human brain which is divided longitudinally into two halves left and right cerebral hemispheres. The hemispheres are connected by a tract of nerve fibres called corpus callosum. The corpus callosum also known as the callosal commissure is a wide, flat bundle of neural fibers beneath the cortex in the mammalian brain at the longitudinal fissure. It connects the left and right cerebral hemispheres and facilitates interhemispheric communication. It is the largest white matter structure in the brain.

Broca's area, also called as convolution of Broca, region of the brain, that contains motor neurons involved in the control of speech. This area is located in the frontal part of the left hemisphere of the brain.

The horse has the largest eye of any land mammal. Its visual abilities are directly related to the animal's behavior and the fact that the horse is a flight animal.
Thus, the correct answer is option B.

Many suspensory ligaments are attached radially around the lens that serve to pull the edges of lens edges toward the outer circle of the eyeball. They maintain the relatively flat shape of the lens under normal conditions of the eye.

Umbraculum is a modification of iris which serves to reduce the excessive glare in daytime. It is found in animals like camels. It is also known as corpus nigra.

In mammalian brain anatomy, the prefrontal cortex (PFC) is the cerebral cortex which covers the front part of the frontal lobe. The prefrontal cortex is in charge of abstract thinking and thought analysis, it is also responsible for regulating behavior. This includes mediating conflicting thoughts, making choices between right and wrong and predicting the probable outcomes of actions or events. This brain area also governs social control, such as suppressing emotional or sexual urges. Since the prefrontal cortex is the brain centre responsible for taking in data through the body's senses and deciding on actions, it is most strongly implicated in human qualities like consciousness, general intelligence, and personality. This vital region of the brain regulates thought in terms of both short-term and long-term decision making. It allows humans to plan ahead and create strategies, and also to adjust actions or reactions in changing situations. Since it controls intense emotions and impulses, it is sometimes referred to as the seat of good judgment. 

The amygdalas are two almond-shaped masses of neurons present on either side of the thalamus at the lower end of the hippocampus. It is considered to be part of limbic system. It is responsible for emotions (such as anger, fear, and sadness, as well as the controlling of aggression), survival instincts, experiences and memory (store memories of events and emotions so that an individual may be able to recognize similar events in the future).