QUESTION 1 The autonomic nervous system is mainly controlled by the_____. Thalam

Question

QUESTION 1

The autonomic nervous system is mainly controlled by the_____.

Thalamus

Hypothalamus

Cerebellum

Precentral gyrus

QUESTION 2

"A patient is admitted to the rehabilitation unit five days after having a stroke. The nurse assesses his muscle strength and determines that he has right-sided weakness. Based on this assessment data, what part of the brain was injured?"

The precentral gyrus on the right side of the brain

The precentral gyrus on the left side of the brain

The temporal lobe of the right side of the brain

The cerebellum on the right side of the brain

What connects the hypothalamus to the pituitary gland?.

Pons

Mammillary bodies

Thalamus

Infundibulum

QUESTION 4

The _____ is a conduction pathway between higher and lower brain centers and houses nuclei for cranial nerves V-VII.

Pons

Mammillary bodies

Hypothalamus

Corpus callosum

QUESTION 5

Afferent signals travel from the periphery of the body to the cerebellum in which of the following nerve tracts?

The spinocerebellar tract

The spinothalamic tract

The corticospinal tract

The dorsal column medial lemniscal tract

QUESTION 6

Which ventricle is continuous with the central canal of the spinal cord?

3rd

4th

lateral

cerebal aquaduct

QUESTION 7

The large commissure that connects the right and left cerebral hemispheres is called the ________.

Pons

Fornix

Thalamus

Corpus callosum

QUESTION 8

White matter is found in all of the following locations except the ________.

corpus callosum

central canal of the spinal cord

outer portion of the spinal cord

arbor vitae of the cerebellum

QUESTION 9

Sensory neurons enter the spinal cord via the ________.

dorsal root

central canal

ventral root

ventral gray horn

QUESTION 10

The mammillary bodies and hipocampus play important roles in ________.

fine motor movements

maintaining balance and equilibrium

memory formation and storage

controlling heart rate and blood pressure

QUESTION 11

Threshold potential is defined as the _______.

maximum potential reached in an action potential

threshold reached in an excitatory post-synaptic potential

minimum voltage necessary to open voltage-gated Na+ channels and start an action potential

QUESTION 12

Which of the following does NOT occur in an action potential?

The membrane's permeability to Na+ and K+ changes

Na+ closing gates close and remain closed until the membrane returns to resting potential

Depolarization is caused by Na+ leaving the cell through active transport which requires ATP

an increase in potassium permeability makes the cell membrane more negative

QUESTION 13

Leak channels are different from voltage-gated channels in that leak channels are opened all the time.

True

False

QUESTION 14

"A small depolarization of the membrane will cause a small action potential, while a large depolarization will cause a large action potential. "

True

False

QUESTION 15

In myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier.

True

False

Thalamus

Hypothalamus

Cerebellum

Precentral gyrus

Explanation / Answer

1) b- hypothalamus controls the autonomic nervous system

2) b- the precentral gyrus on the left side of the brain. (One side of brain controls the other side of the body)

3) d- infundibulum connects these two

4) a) pons

Other part that connects higherhand lower brain is midbrain.

5) a- spinocerebellar tract

6) b- 4th

7) d- corpus callosum

8) c- central canal of spinal cord

9) a- dorsal root

10) c- memory formation and storage

11) c- maximum voltage necessary to open voltage gated Na+channel and start an action potential

12) d- an increase in poassium permeability makes the cell membrane more negative

13) true. They are passive channels. Ion moves along the concentration gradient. From high to low.

14) false. A threshold potential must be reached for action potential to be initiated.

15) true.

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