Forum:Seminar papers/Biophysics/2. LF/2018-2019/Group 5/CDF

'''Forum:Seminar papers/Biophysics/2. LF/2018-2019/Group 5/CDF'''

RADIOACTIVITY:

1. What medical imaging technique produces a 2-dimensional image?

A.            Scintigraphy

B.            SPECT

C.            PET

D.           All of the above

Correct Answer: A

2. Which of the following statements below is true?

A.            PET scans are more advantageous than SPECT because they require less tracer  substance

B.            A collimator is used for SPECT to detect the amount of emitted protons

C.            SPECT and PET detect radiation from only above the patient meanwhile Scintigraphy detects it from circularly around the patient

D.             Gamma rays have not been used for tumor treatment

Correct Answer: A

3. A piece of radioactive material now has about 1 /16 of its previous activity. If the half-life is 4 hours the difference in time between measurements is approximately.

A.            8 hours.

B.            16 hours.

C.            32 hours.

D.            60 hours.

Correct Answer: B

4. Tissues that are highly sensitive to radioactivity.

A.             bone marrow stem cells, spermatogonia, granulosa cells surrounding the ovum

B.             nerve cells, liver, granulosa cells surrounding the ovum

C.             liver, thyroid, connective tissue, vascular endothelium

D.             nerve cells, sense organs

Correct Answer: A

5. In a γ decay,

A.            The neutron splits causing dissipation of energy

B.            There is dissipation of excess energy by using photons spontaneously

C.            A neutron transmutes into a proton

D.           There is dissipation of excess energy by using photons non spontaneously

Correct Answer: B

AUDIOMETRY:

1. What is the most sensitive hearing range for the human auditory organ?

A.            1-5 Hz

B.            1-5 kHz

C.            16 kHz- 20kHz

D.            16 Hz- 20Hz

Correct Answer: B

2. Which of the following is the function of the auditory ossicles/bones?

A.            They are used for conduction of sound waves in the cochlea

B.            Nothing - they are rudimentary bones of the ear

C.            They are used for conduction of sound waves to the round window

D.            They are used for conduction of sound waves to the oval window

Correct Answer: D

3. Which of the following is true about sound waves?

A.            In the human ear we can only perceive sounds in the range of 60Hz to 15kHz

B.            It is a longitudinal mechanical waves of the elastic environment

C.            Air conduction is when sound waves pass from the external ear to the middle ear

D.            Bone conduction is transmission of sound waves through the skull directly into the middle ear

Correct Answer: B

4. Give one special feature of external ear; middle ear; & inner ear:

A.            External ear: characterised by hyaline cartilage; Middle ear: contains two muscles; Inner ear: The windows are made of an elastic membrane

B.            External ear: the auditory tube is a bended oval tube approximately 2.8 cm; Middle ear: hearing bones do not create a chain between the drum and the oval window; Inner ear: is made up of a petite labyrinth in the soft bone

C.            External ear: external auditory canal is another continuation of the auditory organ; Middle ear: composed of the drum, the cavity of the drum and auditory bones; Inner ear: the connection between the middle and the inner ear is realized by two windows

D.            External ear: the auditory tube consists of the outer-fiber and the inner-bone part; Middle ear: includes the Eustachian tube, which connects the inner cavity with the nasopharynx; Inner ear: has two parts -> the vestibular apparatus and the snail

Correct Answer: C

5. The stapes carries sound waves to what structure?

A.            The oval window of the inner ear.

B.            The Eustachian tube

C.            The Tympanic Membrane

D.            The Incus

Correct Answer: A