Question

1. the spinal cord

a) has a core of white matter surrounded by gray matter.
b) has a core of gray matter surrounded by white matter.
c) consists solely of gray matter.
d) consists solely of white matter.

1. ridges of tissue on the surface of the cerebral hemispheres are called

a) fissures b) sulci c) ganglia d) gyri

1. a person receives blunt - force trauma to the back of the head. they report a major loss in vision. which lobe of the brain has most likely been damaged?

a) the occipital lobe b) the temporal lobe c) the parietal lobe d) the frontal lobe

1. the primary motor area of the brain is in the

a) lateral part of the occipital lobe. b) posterior sulcus of the temporal lobe.
c) postcentral gyrus of the parietal lobe. d) precentral gyrus of the frontal lobe.

1. the is the thin, innermost meninx attached to the surface of the brain, containing many nerves and blood vessels.

a) pia mater b) subdural mater c) arachnoid mater d) dura mater

1. the central sulcus separates which lobes?

a) temporal from parietal b) parietal from occipital
c) frontal from parietal d) frontal from temporal

1. cerebrospinal fluid is produced by and it

a) astrocytes; provides a pathway to the blood for waste
b) capillaries in the dura mater; moistens the surface of the brain
c) dura mater; maintains a stable ionic concentration in the cns
d) choroid plexuses in the ventricles; protects the brain from blows to the skull

1. the functions in hearing and smell.

a) parietal lobe b) temporal lobe
c) prefrontal lobe d) frontal lobe

1. excess csf is removed from the subarachnoid space by

a) arachnoid villi. b) microglia. c) the choroid plexus. d) astrocytes.

1. the lateral ventricles communicate with the third ventricle through the

a) corpus callosum b) interventricular foramina
c) hydrocephalus d) cerebral aqueduct

1. extra credit:

the left and right sides of the cerebrum are interconnected by which one of the following?
a) corpus callosum b) arachnoid villi c) insula d) cerebral aqueduct

Explanation:

1. The spinal cord has a core of gray matter surrounded by white matter. Gray matter contains neuron cell bodies, and white matter consists of myelinated axons.
2. Ridges of tissue on the cerebral hemispheres are called gyri. Sulci are the grooves, fissures are deep sulci, and ganglia are clusters of neuron cell bodies outside the CNS.
3. The occipital lobe is the visual processing center. Damage to it can lead to vision loss.
4. The primary motor area is in the precentral gyrus of the frontal lobe. It controls voluntary muscle movements.
5. The pia mater is the innermost meninx attached to the brain's surface, containing nerves and blood vessels.
6. The central sulcus separates the frontal and parietal lobes.
7. Cerebrospinal fluid (CSF) is produced by choroid plexuses in the ventricles and protects the brain from blows.
8. The temporal lobe functions in hearing and smell (also involved in memory and language comprehension).
9. Arachnoid villi remove excess CSF from the subarachnoid space.
10. The lateral ventricles communicate with the third ventricle through the interventricular foramina.
11. The corpus callosum interconnects the left and right sides of the cerebrum.

Answer:

1. B. has a core of gray matter surrounded by white matter.
2. D. gyri
3. A. The occipital lobe
4. D. precentral gyrus of the frontal lobe.
5. A. pia mater
6. C. frontal from parietal
7. D. choroid plexuses in the ventricles; protects the brain from blows to the skull
8. B. temporal lobe
9. A. arachnoid villi.
10. B. interventricular foramina
11. A. corpus callosum