Sheep Brain Anatomy Quiz

The cerebral cortex is the largest structure in the brain when viewed from the dorsal (top) perspective. It is responsible for many higher cognitive functions such as memory, attention, perception, and language. The pons, medulla oblongata, and hippocampus are also important structures in the brain, but they are relatively smaller in size compared to the cerebral cortex.

The correct answer is Dura Mater. The dura mater is the outermost layer of the meninges, which are the protective coverings of the brain and spinal cord. It is a tough and fibrous membrane that helps to protect the brain from injury and provides support to the delicate structures within.

The corpus callosum is a structure in the brain that connects the left and right hemispheres. It is responsible for allowing communication and coordination between the two hemispheres, enabling them to work together efficiently. The other options, such as the temporal lobe, arbor vitae, and ansate sulcus, do not have the same function of dividing the hemispheres. Therefore, the correct answer is the corpus callosum.

Fissures are deep grooves or furrows in the brain that separate different lobes and regions. They are responsible for dividing the brain into distinct functional areas. Unlike sulci, which are shallow grooves, fissures are deeper and more pronounced. Therefore, the correct answer is fissures.

The pituitary gland is a large round structure located under the optic chiasma. It is an endocrine gland that plays a vital role in regulating various bodily functions and releasing hormones. The pineal gland is a small gland located in the brain, the medulla oblongata is a part of the brainstem, and the corpus callosum is a structure that connects the two hemispheres of the brain. Therefore, the pituitary gland is the correct answer.

Gyri are large folds that surround the cerebrum. These folds increase the surface area of the brain, allowing for more neurons and connections to be packed into a smaller space. The gyri play a crucial role in the processing and integration of information in the cerebrum.

The dorsal surface of the medulla forms the floor of the fourth ventricle. The fourth ventricle is a fluid-filled cavity located in the hindbrain, between the pons and the cerebellum. It is responsible for the production and circulation of cerebrospinal fluid (CSF). The medulla, which is a part of the brainstem, is located just above the spinal cord and plays a crucial role in relaying signals between the brain and the spinal cord. Therefore, the correct answer is the fourth ventricle.

The pyriform cortex is found lateral to the peduncles.

The rhinal fissure is the correct answer because it is the structure that separates the pyriform cortex from the temporal lobe. The pyriform cortex is a part of the olfactory system and is involved in processing smell information. The temporal lobe, on the other hand, is responsible for various functions including memory, language, and emotion. The rhinal fissure acts as a boundary between these two structures, helping to separate and define their respective roles in brain function.