1. Which of the following structures is NOT a part of the musclefiber?

A. transverse tubule
B. motor end plate
C. sarcolemma
D. synaptic knob
E. sarcoplasmic reticulum

2. You briefly apply a high concentration of acetylcholine (ACh)directly to the motor end plate and observe no contraction of thefiber. Since muscular dysgenesis only affects one type of cell inthe body you would suspect that the motor neurons of dysgenic micework normally. True or False?

A. True
B. False

3. Arrange the events at the neuromuscular junction in the propersequence from first to last

1. arrival of the action potential at the synaptic knob
2. generation of action potential in sarcolemma
3. binding of ACh to ACh receptors in the motor end plate
4. release of ACh into the synaptic cleft
5. removal of ACh from the cleft by acetylcholinesterase

A. 1, 2, 3, 5, 4
B. 2, 3, 1, 4, 5
C. 1, 4, 3, 2, 5
D. 2, 5, 1, 4, 3

4. After you apply acetylcholine to the muscle fiber you find thatan action potential is generated in the sarcolemma. This resultproves that certain events or conditions occur normally within theneuromuscular junction. Which event or condition is NOT PROVED bythe above result?

A. ACh receptors are present in the membrane of the motor endplate
B. ACh receptors bind to ACh
C. Sodium permeability of the end plate membrane is increased
D. Acetylcholinesterase breaks down ACh

5. Arrange the events of excitation contraction coupling in theproper sequence from first to last

1. cross-bridge cycling
2. action potential in the sarcolemma reaches the triads
3. release of calcium from the sarcoplasmic reticulum
4. exposure of active site on the thin filaments
5. binding of calcium to troponin

A. 2, 3, 5, 4, 1
B. 5, 3, 4, 2, 1
C. 5, 1, 3, 2, 4
D. 3, 5, 2, 4, 1

6. You artificially raise the calcium concentration within thesarcoplasm of the muscle fiber and observe that the cell contractsnormally. From this observation you conclude that the defect inmuscular dysgeny occurs at which step in control of the musclefiber?

A. Exposure of the active site on thin (actin) filaments
B. Binding of calcium to troponin
C. Release of calcium ions from the sarcoplasmic reticulum into thesarcoplasm
D. Repeated cycles of crossbridge binding, pivoting, anddetachment

7. Where in the muscle fiber do you suspect that the normal proteinmade by the mdg gene functions in normal mice?

A. motor end plate
B. triad
C. myofibrils
D. thin filaments

8. All of the following conditions would have same effect onmuscles (flaccid paralysis) as muscular dysgeny with a singleexception. What is the EXCEPTION?

A. botulism
B. poisoning with atropine
C. poisoning with military nerve gas
D. myasthenia gravis

9. You would expect the muscles from an animal afflicted withmuscular dysgenesis to exhibit:

A. hypertrophy
B. atrophy

10. You would expect that a dysgenic mouse dies shortly after birthbecause:

A. the heart fails to beat
B. vasoconstriction of the carotid artery prevents blood flow tothe brain
C. vasodilation of the systemic blood vessels causes the bloodpressure to drop to lethal levels
D. the respiratory muscles are unable to contract

violetgoose732

1. Which of the following structures is NOT a part of the musclefiber?

A. transverse tubule
B. motor end plate
C. sarcolemma
D. synaptic knob
E. sarcoplasmic reticulum

2. You briefly apply a high concentration of acetylcholine (ACh)directly to the motor end plate and observe no contraction of thefiber. Since muscular dysgenesis only affects one type of cell inthe body you would suspect that the motor neurons of dysgenic micework normally. True or False?

A. True
B. False

3. Arrange the events at the neuromuscular junction in the propersequence from first to last

1. arrival of the action potential at the synaptic knob
2. generation of action potential in sarcolemma
3. binding of ACh to ACh receptors in the motor end plate
4. release of ACh into the synaptic cleft
5. removal of ACh from the cleft by acetylcholinesterase

A. 1, 2, 3, 5, 4
B. 2, 3, 1, 4, 5
C. 1, 4, 3, 2, 5
D. 2, 5, 1, 4, 3

4. After you apply acetylcholine to the muscle fiber you find thatan action potential is generated in the sarcolemma. This resultproves that certain events or conditions occur normally within theneuromuscular junction. Which event or condition is NOT PROVED bythe above result?

A. ACh receptors are present in the membrane of the motor endplate
B. ACh receptors bind to ACh
C. Sodium permeability of the end plate membrane is increased
D. Acetylcholinesterase breaks down ACh

5. Arrange the events of excitation contraction coupling in theproper sequence from first to last

1. cross-bridge cycling
2. action potential in the sarcolemma reaches the triads
3. release of calcium from the sarcoplasmic reticulum
4. exposure of active site on the thin filaments
5. binding of calcium to troponin

A. 2, 3, 5, 4, 1
B. 5, 3, 4, 2, 1
C. 5, 1, 3, 2, 4
D. 3, 5, 2, 4, 1

6. You artificially raise the calcium concentration within thesarcoplasm of the muscle fiber and observe that the cell contractsnormally. From this observation you conclude that the defect inmuscular dysgeny occurs at which step in control of the musclefiber?

A. Exposure of the active site on thin (actin) filaments
B. Binding of calcium to troponin
C. Release of calcium ions from the sarcoplasmic reticulum into thesarcoplasm
D. Repeated cycles of crossbridge binding, pivoting, anddetachment

7. Where in the muscle fiber do you suspect that the normal proteinmade by the mdg gene functions in normal mice?

A. motor end plate
B. triad
C. myofibrils
D. thin filaments

8. All of the following conditions would have same effect onmuscles (flaccid paralysis) as muscular dysgeny with a singleexception. What is the EXCEPTION?

A. botulism
B. poisoning with atropine
C. poisoning with military nerve gas
D. myasthenia gravis

9. You would expect the muscles from an animal afflicted withmuscular dysgenesis to exhibit:

A. hypertrophy
B. atrophy

10. You would expect that a dysgenic mouse dies shortly after birthbecause:

A. the heart fails to beat
B. vasoconstriction of the carotid artery prevents blood flow tothe brain
C. vasodilation of the systemic blood vessels causes the bloodpressure to drop to lethal levels
D. the respiratory muscles are unable to contract

copperleopard533

Please Help I keep getting 9/15 and the sytemwont let me know which is inncorect. I only have one moreattempt

QUESTION 1

You examine a young patient in the emergencyroom who is complaining of ankle pain following a soccer game. Thepatient demonstrates to you that an accident resulted in his footbeing forced into an excessively inverted position. Based on thisscenario, which of the following is the most likely injury?

A. fractured lateral malleolus

B. medial malleolar dislocation

C. fractured talus

D. fractured calcaneus

E. tibial dislocation

QUESTION 2

Which of the following is incorrect pertainingto human locomotion?

A. Theknee extensors contract during the first part of the stancephase.

B. Thestance phase of walking is longer than the swing phase.

C. Thestance phase of walking begins with ï¿½foot-flatï¿½ as the entireplantar surface of the foot contacts the ground.

D. Thepush-off phase of walking is associated with contraction of theplantar flexors.

E. During walking there is a period when both feet are in contact withthe ground.

QUESTION 3

Which of the following would conclusivelydemonstrate functionality of the deep fibular nerve?

A. inversion of the foot

B. response to pin prick on the foot at the level of the malleoli

C. response to pin prick on the anteromedial surface of the middle ofthe leg

D. eversion of the foot

E. response to pin prick on the foot between the first and secondtoes

QUESTION 4

Which of the following is not correct for thecribriform plate?

A. Itis part of the ethmoid bone.

B. Itis located posterior to the frontal crest.

C. Itis located in the middle cranial fossa.

D. Itlies adjacent to the crista galli.

E. Itpossesses numerous tiny foramina that transmit olfactorynerves.

QUESTION 5

During a difficult delivery an obstetricianuses forceps to extract the infant. Upon examining the baby younotice forceps impressions posteroinferior to the ear. You are mostconcerned that the:

A. styloid process and associated muscles may have been avulsed.

B. forceps may have penetrated a fontanelle.

C. middle ear cavity may have been crushed.

D. facial nerve may have been injured.

E. mastoid process may have been avulsed.

QUESTION 6

Which of the following is incorrect pertainingto the scalp?

A. Blood vessels and nerves enter the scalp inferiorly.

B. Thescalp muscles (e.g., occipitofrontalis) are attached to thepericranium.

C. Scalp injuries can result in ï¿½black eyes.ï¿½

D. Superficial wounds do not gape because the margins of the wound areheld together by the epicranial aponeurosis.

E. Scalp infections may spread to the brain via emissary veins thatpass through parietal foramina.

QUESTION 7

Which of the following associations pertainingto the dural venous sinuses is incorrect?

A. confluence of the sinusesï¿½near internal occipital protuberance

B. arachnoid granulationsï¿½calcifications of arachnoid mater within thesinuses associated with arteriosclerosis

C. occipital sinusï¿½metastases via internal vertebral venousplexuses

D. inferior sagittal sinusï¿½located within the falx cerebri

E. sigmoid sinusï¿½continues inferiorly as internal jugular vein

QUESTION 8

You examine a comatose patient in theemergency room. His wife relates that her husband was struckaccidentally in his ï¿½templeï¿½ by a baseball. After an initial periodof unconsciousness, he seemed to be okay but later became drowsyand comatose. You suspect that the patient is suffering from:

A. anextradural (epidural) hematoma caused by a laceration of thetransverse venous sinus.

B. anextradural (epidural) hematoma caused by a laceration of a branchof the middle meningeal artery.

C. asubdural hematoma caused by a laceration of a branch of the middlemeningeal artery.

D. asubarachnoid hemorrhage caused by a laceration of the internalcarotid artery.

E. asubdural hematoma caused by a laceration of a branch of thetransverse venous sinus.

QUESTION 9

Which of the following associations isincorrect pertaining to the blood supply of the brain?

A. anterior communication arteryï¿½connects anterior cerebralarteries

B. middle cerebral arteryï¿½supplies the lateral surface of thebrain

C. cerebral arterial circle (circle of Willis)ï¿½in most cases preventsdevelopment of neurological symptoms following acute ischemicstroke

D. cerebral arterial circle (circle of Willis)ï¿½an anastomosis betweenthe two vertebral and two internal carotid arteries

E. hemorrhagic strokeï¿½severe headache and stiff neck

QUESTION 10

Which of the following is not correctpertaining to olfaction?

A. Theolfactory tract terminates in the medulla.

B. Theaxons of secondary olfactory neurons form the olfactory tract.

C. Thecentral processes of the right and left olfactory receptor neuronseach collectively form the right and left olfactory nerve.

D. Thecentral processes of the olfactory receptor neurons pass throughforamina in the cribriform plate.

E. Theolfactory nerves terminate in the olfactory bulb, which is incontact with the orbital surface of the frontal lobe of thebrain.

QUESTION 11

Upon neurological examination, you notice aslow pupillary light reflex in a patient's right eye. Which of thefollowing is consistent with this sign?

A. compression of the right facial nerve proximal to the geniculateganglion

B. compression of the right facial nerve distal to the geniculateganglion

C. compression of the right oculomotor nerve

D. lesion of the left long ciliary nerves

E. lesion of the right nasociliary nerve

QUESTION 12

Which of the following is not correct for thetrochlear nerve?

A. Itpasses through the superior orbital fissure.

B. Nerve injury is characterized by inability to focus on nearobjects.

C. Itinnervates the superior oblique.

D. Nerve injury is characterized by lack of coordination for the twoeyes when looking downwards.

E. Itemerges from the posterior aspect of the brainstem.

QUESTION 13

Which of the following is not correct for themotor fibers of the trigeminal nerve?

A. Theyinnervate the muscles of mastication.

B. Theypass through foramen ovale.

C. Theyare distributed entirely with the mandibular division.

D. Theyinnervate the tensor tympani muscle.

E. Theyoriginate in the trigeminal ganglion.

QUESTION 14

A lesion of the facial nerve may result in allof the following except:

A. lossof taste from the anterior two-thirds of the tongue.

B. increase in loudness of sound

C. partial sensory denervation of the auricle.

D. inability to open eye.

E. lossof tear production.

QUESTION 15

Which of the following is not correctpertaining to the VIIIth (vestibulorcochlear) cranial nerve?

A. Itcontains somatic motor fibers.

B. Itenters the internal acoustic meatus.

C. Alesion can result in vertigo.

D. Alesion can result in tinnitus.

E. Alesion can result in hearing loss.

maroonwombat723

RIU 436 Lecture 30: Typical Carotid Examination

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