Ch 12 HW - Mastering A&P

Corpus callosum The corpus callosum is a large fiber tract of axons connecting the right cerebral hemisphere to the left cerebral hemisphere.

Hypothalamus The thalamus is the central region of the diencephalon and forms the central core of the brain. The thalamus is enclosed by the cerebrum.

Cerebellum The white matter in the cerebellum has a branching arrangement that resembles a tree. This structure is named for its appearance. The term arbor vitae means "tree of life."

Superior colliculus The superior colliculus is clearly observed in the transverse fissure on the back of the midbrain. It is involved with directing eye movement.

Cerebrum The cerebrum is involved in higher order functions such as consciousness, personality, and intellect.

Cranial nerve I is the olfactory nerve.

The optic chiasm is where the optic nerves cross midline, so that sensory information from one side of the body is processed on the opposite side of the brain.

Nerves are bundles of axons found in the peripheral nervous system. The optic nerve is an extension of the brain, not part of the brain.

The pituitary gland can be seen on the ventral surface of the brain. It can easily be removed with the meninges if care isn't taken to keep it attached.

The infundibulum attaches the pituitary gland to the hypothalamus. It contains axons that originate in the hypothalamus and end in the posterior pituitary.

All 3 regions of the brain stem, the midbrain, pons, and medulla oblongata, can be observed on the ventral surface.

The cerebellum is not a ventral structure. It is located on the dorsal surface of the brain.

The lateral ventricles lie side by side under the corpus callosum, separated by the septum pellucidum.

The cerebral aqueduct is the narrow passageway that connects the third and fourth ventricles. It can sometimes be observed on a midsagittal section.

The central canal is the canal found in the spinal cord that originates off of the fourth ventricle.

True The choroid plexus produces cerebrospinal fluid. It is found in each of the ventricles.

True. Narrow passageways connect the ventricles together, so that cerebrospinal fluid flows freely inside the ventricular system.

The lateral ventricles are cavities within the cerebrum. The right and left lateral ventricles are separated on midline by the septum pellucidum.

The cerebral cortex is composed of gray matter. Gray matter is primarily neuron cell bodies.

White matter is predominately myelinated axons, which transmit information (action potentials).

True

True

False

3

Hypothalamus

Thalamus

Epithalamus

False

True

3

Medulla Oblongata

Midbrain

Fourth ventricle

True

True

Starting at noon and working clockwise: Lateral ventricle Interventricular foramen Third ventricle Cerebral aqueduct Fourth ventricle Central canal Lateral aperture Septum pellucidum

Starting at noon and working clockwise: Lateral ventricle Third ventricle Fourth ventricle Median aperture Lateral aperture Cerebral aqueduct Interventricular foramen

Starting at 1 and working clockwise: Parietal lobe Occipital lobe Cerebellum Spinal cord Medulla oblongata Pons Temporal lobe Frontal lobe

Starting at top left and working clockwise: Cerebral hemisphere Corpus callosum Fornix Fourth Ventricle Mammillary body Pituitary gland Optic chiasma Intermediate mass of thalamus Septum pellucidum

Starting at noon and working clockwise Thalamus Pineal gland Midbrain Cerebellum Medula oblongata Spinal cord Pons Hypothalamus

Starting at noon and working clockwise Corpus callosum Choroid plexus Corpora quadrigemina Arbor vitae Cerebral aqueduct Pituitary gland Posterior commisure Anterior commisure

pia matter

Both neurons carry afferent information.

ependymal cells

choroid plexus