Suggested solutions - multiple choice

[jds5350]

Question 42

sleep apnea is defined as

C)  temporary cessation of breathing for 2 to 20 seconds
D)  temporary cessation of breathing for 20 seconds to 2 minutes

What did everyone else put???

[Ripe.Banana]

its D

[jsher098]

25 is C as that is the best possible answer.

13 is A- can't be c or d due to pacemaker. cant be b due to injection of radioactive glucose solution. so A is the best possible answer.
otherwise all the other answers are good!

But a CT scan doesn't show function so how can it be a?
And with q 25, it is about size constancy so the viewers perception would not change. so it would be a.
[/quote

An elderly women with a pacemaker, needs to have a brain scan to investigate a possible brain abnormality- that is what a CT can show. It can't be c or d due to pacemaker and cant be b as PET involves injection of radioactive glucose solution

[jsher098]

Question 42

sleep apnea is defined as

C)  temporary cessation of breathing for 2 to 20 seconds
D)  temporary cessation of breathing for 20 seconds to 2 minutes

What did everyone else put???

D 2 to 20 seconds is incorrect (too short)

[jds5350]

Question 41

Mel is sufering from hypersomnia
He is likely to;
A) fall asleep immediately upon going to bed
D) experience sudden NREM sleep episodes during wakeful periods of the day.

I put (D)

[jessie_111]

25 is C as that is the best possible answer.

13 is A- can't be c or d due to pacemaker. cant be b due to injection of radioactive glucose solution. so A is the best possible answer.
otherwise all the other answers are good!

But a CT scan doesn't show function so how can it be a?
And with q 25, it is about size constancy so the viewers perception would not change. so it would be a.
[/quote

An elderly women with a pacemaker, needs to have a brain scan to investigate a possible brain abnormality- that is what a CT can show. It can't be c or d due to pacemaker and cant be b as PET involves injection of radioactive glucose solution

Although that is true, the question says: "wants to investigate the <b>function</b> of Zoe's brain"  CT scans do not show function, only structure.
I suppose we won't know the correct answer until the results come!

[classy1112]

No, all of them are incorrect in some way.

fMRI uses magnets. That's what the M stands for. An fMRI uses the same base technology as an MRI. An fMRI takes a lot of MRI, but it still uses the same magnetic principle.

This is on a fMRI safety warning.

"Safety is a very important issue in all experiments involving MRI. Potential subjects must ensure that they are able to enter the MRI environment. Due to the nature of the MRI scanner, there is an extremely strong magnetic field surrounding the MRI scanner (at least 1.5 teslas, possibly stronger). Potential subjects must be thoroughly examined for any ferromagnetic objects (e.g. watches, glasses, hair pins, pacemakers, bone plates and screws, etc.) before entering the scanning environment."

So technically they are all wrong and the question should be omitted.

[jsher098]

Question 41

Mel is sufering from hypersomnia
He is likely to;
A) fall asleep immediately upon going to bed
D) experience sudden NREM sleep episodes during wakeful periods of the day.

I put (D)

t

Question 41

Mel is sufering from hypersomnia
He is likely to;
A) fall asleep immediately upon going to bed
D) experience sudden NREM sleep episodes during wakeful periods of the day.

I put (D)

Correct answer is A. Hypersomnia is excessive sleepiness. D is an unrealistic answer and A makes more sense- that a person who is really sleepy would fall asleep quickly.

[jsher098]

No, all of them are incorrect in some way.

fMRI uses magnets. That's what the M stands for. An fMRI uses the same base technology as an MRI. An fMRI takes a lot of MRI, but it still uses the same magnetic principle.

This is on a fMRI safety warning.

"Safety is a very important issue in all experiments involving MRI. Potential subjects must ensure that they are able to enter the MRI environment. Due to the nature of the MRI scanner, there is an extremely strong magnetic field surrounding the MRI scanner (at least 1.5 teslas, possibly stronger). Potential subjects must be thoroughly examined for any ferromagnetic objects (e.g. watches, glasses, hair pins, pacemakers, bone plates and screws, etc.) before entering the scanning environment."

So technically they are all wrong and the question should be omitted.

Read the question carefully:

Zoe, an elderly woman with a pacemaker needs to have a brain scan to investigate a possible brain abnormality. If her neurosurgeon wants to investigate the funtion of Zoe's brain, but avoid using invasive injections, which would be the best technique:

CANNOT be MRI or fMRI due to pacemaker.
CANNOT be PET as it involves the injection of a radioactive glucose solution into the bloodstream.
brain scan to investigate a possible brain abnormality- CT provides information on the size and location of brain abnormalities- CT is the best possible answer- not the best question but my teacher is an examiner and she has told me its not being taken off the exam. the thing with some multiple choice questions is to select the BEST POSSIBLE ANSWER- might not be 100% correct- but it is more correct than the other three alternatives

[jds5350]

In the last SA question (14C)
It asked what two main pieces of info must be given to participants in order for them to decide whether or not to consent to being in the study?
--- I wrote that they must be informed of the processes of the experiment and the aim of the experiment.
 I also wrote they must be told that they hav the right to withdraw at any time.

i was in a hurry and im not sure if these are correct or not??

[ngRISING]

Read the question carefully:

Zoe, an elderly woman with a pacemaker needs to have a brain scan to investigate a possible brain abnormality. If her neurosurgeon wants to investigate the funtion of Zoe's brain, but avoid using invasive injections, which would be the best technique:

the person who wrote this question deserves to burn and rot in hell.

[anonuser0511]

i agree that 39 could be D

muscles undergo partial paralysis during REM sleep, therefore less muscular movemennt

uhoh - i had everything you put.
i was unsure because it seems ever "never" or "always" option is wrong.

i went with PET for Q13, although hopefully they take that Q out.

[jsher098]

In the last SA question (14C)
It asked what two main pieces of info must be given to participants in order for them to decide whether or not to consent to being in the study?
--- I wrote that they must be informed of the processes of the experiment and the aim of the experiment.
 I also wrote they must be told that they hav the right to withdraw at any time.

i was in a hurry and im not sure if these are correct or not??

- Understand the nature of the research
-The risks and the requirements

[anonuser0511]

In the last SA question (14C)
It asked what two main pieces of info must be given to participants in order for them to decide whether or not to consent to being in the study?
--- I wrote that they must be informed of the processes of the experiment and the aim of the experiment.
 I also wrote they must be told that they hav the right to withdraw at any time.

i was in a hurry and im not sure if these are correct or not??

- Understand the nature of the research
-The risks and the requirements

yea i explained them even though it was two marks. Necessary or not?

[jsher098]

In the last SA question (14C)
It asked what two main pieces of info must be given to participants in order for them to decide whether or not to consent to being in the study?
--- I wrote that they must be informed of the processes of the experiment and the aim of the experiment.
 I also wrote they must be told that they hav the right to withdraw at any time.

i was in a hurry and im not sure if these are correct or not??

- Understand the nature of the research
-The risks and the requirements

yea i explained them even though it was two marks. Necessary or not?

Well the definition for informed consent is: Participants must sign a form to show they understand the nature or the research, the risks and the requirements.
So as long as you put it nature of the research and risks and requirements you will be fine as that is two different piece of information. explaining never hurts though.