Mcb Lecture 4 Exam

Front 1

the flexor reflex involves a single cord segment

Back 1

false

Front 2

the stretch reflex is polysynaptic

Back 2

false

Front 3

the flexor reflex involves tissues on both side of the body

Back 3

false

Front 4

a gyrus is a groove on the surface of the brain

Back 4

false

Front 5

the special arrangement of nerve cell bodies and/or axons in the CNS in which specific parts of the human body are represented by specific regions of the nerve cells and/or axons is known as somatotopic

Back 5

true

Front 6

the primary motor area of a cerebral hemisphere is on the precentral gyrus

Back 6

true

Front 7

on the postcentral gyrus the lower extremity is represented by the most lateral neurons

Back 7

false

Front 8

the primary visual area of cerebral hemisphere relates present to past visual experiences

Back 8

false

Front 9

the visual association area receives impulses from the primary visual area and the thalamus

Back 9

true

Front 10

the primary auditory area of the cerebral hemisphere determines pitches and rhythms

Back 10

true

Front 11

the pathways for voluntary motor activity that we have studied are considered to be three neuron pathway, as inter neurons are always emphasized

Back 11

false

Front 12

the primary motor areas of the cerebral hemispheres are posterior to the central sulci

Back 12

false

Front 13

the pathways for voluntary motor activity to the limbs and trunk that we have studied are corticospinal pathways which are approximately 100% crossed

Back 13

true

Front 14

within the corticospinal pathway the cell bodies of lower motor neurons begin in the gray matter of the brain stem

Back 14

false

Front 15

the corticospinal pathway to the lower limbs that we have studied has approximately 100% if the axons in the pathway that crosses to the opposite side of the CNS in the spinal cord

Back 15

false

Front 16

in the corticospinal system upper motor neurons pass through the internal capsule which is between the corpus callosum and the longitudinal fissure

Back 16

false

Front 17

in the corticospinal system injuries to lower motor neurons results in spastic paralysis

Back 17

false

Front 18

regarding the corticobulbar pathways for voluntary motor activities related to cranial nerves, most cranial nerves that contain the somatic motor function receive upper motor neurons from only one side of the brain

Back 18

false

Front 19

the portion of the CN 7 that supplies muscles on the upper face receives upper motor neurons from only the opposite side of the brain

Back 19

false

Front 20

with regards to the sensory pathway we have examined, the pathways all involve a 3 neuron pathway

Back 20

true

Front 21

with regards to the sensory pathways we have examined, most of the first order neurons that begin in the PNS have their cell bodies in the CNS

Back 21

false

Front 22

with regards to the "rules" regarding the sensory pathways we have examined, second order neurons always cross to the opposite side of the CNS in the spinal cord

Back 22

false

Front 23

the pathway for pain, temperature, crude touch, and pressure involves axons that are in the anterior, lateral, and posterior funiculi

Back 23

false

Front 24

the second order neuron in the spinothalamic tract begins (has it's cell body) at the level of brain stem

Back 24

false

Front 25

the second order neuron in the spinothalamic tract ends in the thalamus

Back 25

true

Front 26

the third order neuron in the spinothalamic pathway from the lower extremity has a cell body in the internal capsule

Back 26

false

Front 27

a piece of ice can be used to test for injury to the spinothalamic tract

Back 27

true

Front 28

the posterior column ascending pathwayS are related to the sensations of proprioception, fine touch, vibration

Back 28

true

Front 29

first order axons in the posterior column pathways begin in the periphery as a part of spinal nerves, enter the spinal cord, and pass to brain stem

Back 29

true

Front 30

the left fasciculus gracilis relates to vibration sensations from the right upper extremity

Back 30

false

Front 31

the patient has an injury to their lumbar and sacral spinal nerves on the left side of the body

loss of:
essentially all voluntary motor activity in the left lower limb.
vibration sensitivity in left lower limb.
pain sensation in the left lower limb.
as time passes there is a flaccid paralysis in the left lower limb.

Back 31

true

Front 32

the patient has injury to the right side of their brain in either the internal capsule or cortical area.

loss of:
essentially all voluntary motor activity in the right lower limb.
vibration sensitivity in the right lower limb.
pain sensation in the right lower limb.
as time passes there is spastic paralysis in the right lower limb

Back 32

false

Front 33

the patient has an injury to the left side of their spinal cord in the mid thoracic region.

loss of:
essentially all voluntary motor activity in the right lower limb.
vibration sensitivity in the right lower limb.
pain sensation in the left lower limb.
as time passes there is spastic paralysis in the right lower limb

Back 33

false

Front 34

the patient has injury to the right side of the spinal cord at about C3 cord segment or higher.

loss of:
all voluntary motor activity in the right upper and lower limbs.
vibration sensitivity in the right upper and lower limbs.
pain sensation in the left upper and lower limb
as time passes there is spastic paralysis in the right upper and lower limbs

Back 34

false

Front 35

the thalamus is an important sensory pathway relay center

Back 35

true

Front 36

the caudate nucleus is big, blocky, square structure

Back 36

false

Front 37

each cerebral peduncle contains axons of neurons related to the corticospinal and corticobulbar pathways

Back 37

true

Front 38

each posterior cerebral artery supplies the frontal, parietal, and temporal lobes, as well as the internal capsule

Back 38

false

Front 39

each vertebral artery ends by uniting with the opposite side vertebral artery to form the basilar artery

Back 39

true

Front 40

the circle of wills is formed by the external carotid arteries, the anterior and posterior cerebral arteries, and the anterior and posterior communicating arteries

Back 40

false

Front 41

the choroid is the brown coat that is a part of the middle vascular tunic of the eyeball that lines the sclera

Back 41

true

Front 42

the fovea centralis is the anterior edge of the retina

Back 42

false

Front 43

the anterior chamber of the eye is defined as the region b/n the cornea and the lens

Back 43

false

Front 44

the ear drum seperates the middle ear from the inner ear

Back 44

false

Front 45

the osseous labyrinth is a series of cavities in the squamous portion of the temporal lobe

Back 45

false

Front 46

the external carotid artery has branches that supply blood to structures in the lower half of the neck

Back 46

false

Front 47

a branch of the external carotid artery supplies the tongue region

Back 47

true

Front 48

an internal jugular vein joins a subclavin vein to form a brachiocephalic vein

Back 48

true

Front 49

each subclavian artery has an internal thoracic branch to the anterior chest wall and upper abdominal wall

Back 49

true

Front 50

the arch of the aorta directly gives rise to the right subclavian artery, right common carotid artery, left common carotid artery, and a left subclavian artery

Back 50

false

Front 51

the right brachiocephalic vein is more horizontal than the left brachiocephalic vein

Back 51

false

Front 52

the axillary artery has anterior and posterior circumflex humeral branches to the proximal humerus

Back 52

true

Front 53

the deep brachial artery runs in the radial groove with the radial nerve on the back of the humerus

Back 53

true

Front 54

at the wrist the ulnar artery is protected by the pisiform bone

Back 54

true

Front 55

the left coronary artery has a branch to the sinoatrial node

Back 55

false

Front 56

the azygous system of veins drains blood from branches of the thoracic aorta, branches of the abdominal aorta, and branches of the internal thoracic arteries

Back 56

true

Front 57

the descending thoracic aorta has paired branches to the posterior intercostal spaces

Back 57

true

Front 58

mid line branches of the abdominal aorta supply the gut tube from the end of the esophagus to the upper half of the rectum

Back 58

true

Front 59

the hepatic portal vein enters the porta hepatis of the liver

Back 59

true

Front 60

the mid line branch of the abdominal aorta that supplies blood to the jejunum and ileum is the inferior mesenteric artery

Back 60

false

Front 61

the left renal vein receives the left gonadal vein

Back 61

true

Front 62

the inferior vena cava is a right side structure

Back 62

true

Front 63

the external iliac artery has branches that supply the external surface of the lower abdominal wall

Back 63

false

Front 64

the external iliac artery passes under the inguinal ligament to become the femoral artery

Back 64

true

Front 65

the femoral artery has direct branches to the hamstring muscles

Back 65

false

Front 66

the posterior tibial artery passes down the back of the leg with the deep peroneal nerve

Back 66

false

Front 67

the small saphenous vein drains the medial side of the leg

Back 67

false

Front 68

the costocervical trunk is a branch of the subclavian artery and supplies the upper ribs, the upper intercostal spaces, and the lower neck

Back 68

true

Front 69

the anterior and posterior ulnar recurrent arteries are branches of the ulnar artery that are involved with collateral circulation around the ulnar side of the elbow

Back 69

true

Front 70

the internal pudendal artery is a branch of the internal iliac artery and supplies the anal region and external genitalia

Back 70

true

Front 71

right gastric artery is one of the 3 majoe branches od the celiac artery and supplies the entire lesser curvature of the stomach

Back 71

false

Front 72

temporal a is a terminal branch of the external carotid and has a "huge" (more than 10) number of side branches

Back 72

false

Front 73

if, in the fetus, the arch of the aorta is blocked in the region past the left subclavian a, the fetus has major problems

Back 73

false

Front 74

when adult curculation is established a blockage of the arch of the aorta just after the left subclavian a is given off reults in a collateral curculation using intercostal arteries

Back 74

true

Front 75

if blood cannot pass through the liver, blood in the hepatic portal v may pass from the hepatic portal v to the lower esophagus, to the middle esophagus, and then to the azygous system of v

Back 75

true

Front 76

if blood cannot pass through the liver, blood in the hepatic portal v may pass through anastomoses w renal v to reach the inferior vena cava

Back 76

true

Front 77

i the liver encompasses the inferior vena cava, blood in the lower inferior vena cava may not be able to get back to the heart by the inferior vena cava

Back 77

true

Front 78

if the liver encompasses and blocks the inferior vena cava serious consequences will occur, the result of which is the patient's unfortunate ability to cough up blood

Back 78

true

Front 79

if the liver compresses and blocks the inferior vena cava blood from lower extremities can pass up the anterior abdominal wall and route back to the heart

Back 79

true

Front 80

if the liver compresses and blocks the inferior vena cava distended veins on the anterior abdominal wall produce a condition known as montezuma's revenge

Back 80

false

Front 81

when blood in the hepatic portal v cannot pass through the liver, or when the liver compresses the inferior vena cava, veins in the rectum distend

Back 81

true

Front 82

if the liver compresses and blocks the inferior vena cava blood can pass from the external iliac vein to the internal iliac vein to the lower rectum to the upper rectum to the hepatic portal system to the esophageal veins en route to the heart

Back 82

true