27) Masses of myelinated nerve fibers appear A) gray. B) white. C) yellow D) bro

Question

27) Masses of myelinated nerve fibers appear A) gray. B) white. C) yellow D) brown E) transparent 28) Which of the following link(s) the cerebral hemispheres with the brain stem? A) medulla oblongata B) pons C) midbrair D) diencephalon E) cerebellum 29) Major centers concerned with autonomic control of breathing, blood pressure, heart rate, and digestive activities are located in the A) medulla oblongata. B) pons. C) midbrain. D) diencephalons. E) cerebellum. 30) The region of the brain that is involved in conscious thought and intellectual function as well as processing somatic sensory and motor information is the A) medulla B) pons. C) midbrain. D) cerebellum. E) cerebrum. 31) The two cerebral hemispheres are separated by the A) longitudinal fissure. B) central sulcus. C) lateral sulcus. D) frontal lobe. E) postcentral sulcus 32) The primary connection between cerebral hemispheres is the A) cerebellum. B) precentral gyrus. C) postcentral gyrus. D) midbrain E) corpus callosum

Explanation / Answer

27. B. white.

The fatty nature of myelin is responsible for the glistening whiteness of the peripheral nerve trunks and white matter of the CNS.

28. D. Diencephalon

The diencephalon is located between the cerebrum and midbrain. It consists of the thalamus and hypothalamus which lie deep in the cerebral hemispheres. It continues from the cerebrum above and connects to the spinal cord below. The brain stem is made up of the midbrain, pons and medulla oblongata.

29. A. Medulla oblongata

It controls the involuntary acivities. The medulla oblongata helps regulate breathing, heart and blood vessel function, digestion, sneezing, and swallowing. This part of the brain is a center for respiration and circulation. Sensory and motor neurons (nerve cells) from the forebrain and midbrain travel through the medulla.

30. E. cerebrum.

The cerebrum or cortex is the largest part of the human brain, associated with higher brain function such as thought and action.

31. A. longitudinal fissure

The vertebrate cerebrum (brain) is formed by two cerebral hemispheres that are separated by a groove, the longitudinal fissure. The brain can thus be described as being divided into left and right cerebral hemispheres.

32. E. corpus callosum

The part of the brain that connects the two hemispheres of the brain is called the corpus callosum. It contains a bundle of neuronal fibers found in humans and other higher order mammals that allow the two hemispheres to talk to one another.

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.