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Ten questions on photobiology

Photobiology
Created 2019.
This exercise will ask you a set of ten questions on photobiology. Each question contains only one correct answer.
 
If you want to read up on it, you can do so by clicking on the link below.
 
Learning Objectives
 
  • Name bands within the electromagnetic spectrum
  • Describe variations in ultraviolet radiation (UVR) at the earth's surface
  • Describe effects of light on the skin
  • Describe the response of the skin to UVR
  • Define skin phototypes
  • Describe photoprotective measures
Created by: Dr Muhammad Wasay Ali Khan, DermNet NZ Volunteer
Editor: Adjunct A/Prof Amanda Oakley, Dermatologist, Hamilton, New Zealand
Photobiology
Created 2019.
This exercise will ask you a set of ten questions on photobiology. Each question contains only one correct answer.
 
If you want to read up on it, you can do so by clicking on the link below.
 
Learning Objectives
 
  • Name bands within the electromagnetic spectrum
  • Describe variations in ultraviolet radiation (UVR) at the earth's surface
  • Describe effects of light on the skin
  • Describe the response of the skin to UVR
  • Define skin phototypes
  • Describe photoprotective measures
Created by: Dr Muhammad Wasay Ali Khan, DermNet NZ Volunteer
Editor: Adjunct A/Prof Amanda Oakley, Dermatologist, Hamilton, New Zealand
1. Properties of a wavelength:
a. Light of wavelength 450 nm is very damaging to the superficial skin
b. Electromagnetic energy at 380 nm penetrates into the dermis
c. Electromagnetic energy at 240 nm causes sun damage and skin cancer
d. Light of wavelength 311nm is blue
2. At sea level on the earth's surface in summer in New Zealand, ultraviolet radiation (UVR) is increased:
a. If there is a reduction in the ozone
b. If there are clouds obscuring the sun
c. At a lower altitude
d. At 12 pm (day light saving time) compared with 2 pm
3. At sea level on the earth's surface in the Southern Hemisphere, a person is exposed to less UVR:
a. In February compared to October
b. On a sandy beach
c. In Northland (35° S) compared to Wellington (41° S)
d. Behind window glass
4. Immune changes caused by UV does not involve:
a. Neuropeptides
b. Langerhans cells
c. Melanin
d. Suppressor T cells
5. Following sun exposure, erythema is not induced by:
a. Exposure to UVB
b. Peptides released from nerve cells
c. Direct damage to DNA in keratinocytes
d. UVC
6. Exposure to UVR may result in:
a. A reduction in preformed melanin
b. Increased melanin production in melanocytes
c. Decreased melanin distribution in keratinocytes
d. Increased melanin production by keratinocytes
7. Sun damage may result in:
a. Increased skin elasticity
b. Glabellar frown lines
c. Thin fragile tissue
d. Seborrhoeic keratoses
8. Sun protective measures should include:
a. Any clothing is fine as long as sunscreen is applied to uncovered skin
b. Sunscreens only need to protect against UVB
c. By reapplying frequently, SPF 15 becomes SPF 30
d. Water resistance is desirable for bathing in a spa pool
9. Select the correct band for UVC
a. 200–290 nm
b. 290–320 nm
c. 320–400 nm
d. 400–700 nm
10. Which phototype fits with the description "Very fair. Burns easily, doesn't tan"
a. 1
b. 2
c. 3
d. 4
e. 5
f. 6
0
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