Physics of the Human Body I Name____________________
Quiz #1
June 23, 2008
Answer Questions _____ and _______ Then answer questions 7 - 15
1. Describe the oxygen-hemglobin dissociation curve.
2. Discuss the oxygen debt
3. Discuss energy metabolism and how glucose is converted into energy.
4. Discuss the basal metabolic rate. What affects it, why is it important.
5. What is ATP and why is it important in energy metabolism.
6. Discuss diets, including the glycemic index and in general how they work and then ame at least two different diets.
7. The anatomy of the human eye is precisely designed for what ultimate goal?
a. To scatter light rays
b. To focus images on the back of the retina
c. To minimize the amount of light entering the eye
d. To produce a virtual image (an image in which light rays do not actually pass through)
8. Aperture(s) of the eye:
a. Include the cornea
b. Include the pupil
c. Refract light rays as they enter the eye
d. Opening(s) in the eye through which light rays enter the eye
e. A and C
f. B and C
g. B and D
h. All of the above
9. Under which of the following circumstances will a light ray NOT refract?
a. A light ray passes at an angle from a material with low optical density to a material with a high optical density.
b. A laser beam approaches an air-to-water boundary at 65 degrees from normal
c. A light ray approaches perpendicular to a boundary in which it passes from a material with low index of refraction to a material with a high index of refraction.
d. None of the above.
10. What is the direction of refraction if a light wave crosses a boundary from a material with a low index of refraction (low “n”) into a material with a high index of refraction (high “n”)?
a. Towards normal
b. Away from normal
11. What equation would you use to determine by how much a light ray would refract as it passes from air (n = 1.0003) to water (n = 1.33)?
a. Lens Equation
b. Snell’s Law
c. Refraction Law
d. Angle Equation
12. Consider the near and far points of the eye. Which one would be affected by diminished power of accommodation?
a. Near point
b. Far point
13. Which of the following are true of accommodation?
a. Accomodation is the ability of the eye to change the focal length of the cornea-lens system
b. Accomodation is the ability of the eye to change the image distance (distance between the retina and the cornea-lens system)
c. Accomodation is mediated by the pupil
d. Accomodation is mediated by the lens and ciliary muscles
e. A and C
f. A and D
g. B and C
h. B and D
14. When swimming under water, it is difficult to see clearly. This is because the optical system of the human eye is designed to see through air, not water. Knowing that the index of refraction: for air is 1.0003, for water is 1.33, and for the cornea-lens system is 1.37-1.4, what form of the “opia’s” does a human exhibit when trying to see under water?
a. Hyperopia
b. Myopia
15. How does an optometrist correct for myopia?
a. Equips the eye with a diverging lens to shorten the focal length of the cornea-lens system
b. Equips the eye with a diverging lens to lengthen the focal length of the cornea-lens system
c. Equips the eye with a converging lens to shorten the focal length of the cornea-lens system
d. Equips the eye with a converging lens to lengthen the focal length of the cornea-lens system
QUESTIONS FOR FUTURE EXAMS
How are x-rays produced?
How are x-rays used to image the body?
How are x-rays used to treat cancer?
Discuss electromagnetic radiation.
Discuss bracytherapy
Please describe the way that heat is lost from the body.
Discuss the causes of and the treatment of hypothermia and hyperthermia.
Discuss diabetes, how it is caused and some of the problems people get who have the disease
Discuss the physics and the operation of the knee.
How strong are bones? Point out how bones are broken, how forces are dissipated, tensile and compressive strength, etc.
How does the body handle a dynamic load? Talk about stopping and how damage occurs. Equations are helpful.
Descibe the flow volume curves of the lung and how they are used to diagnosis restrictive and obstructive
lung diseases.
Describe the physics of the middle ear.
Discuss the electrical conduction system of the heart. Describe the PQRST complex as part of your answer.
How does MRI work. Be brief, but include the basics.
Discuss the work of breathing.
Discuss how the eye refracts light.
Discuss how the lens of the focuses.
Discuss the physics of diving.
What is a hiatal hernia and what role does pressure play in this disesae
Discuss stress incontinence paying particular attention to the effects of pressure
Discuss a red blood cell, does it use more or less oxygen, its shape, and what happens to its numbers with anemia.
Discuss hemoglobin and the oxygen hemoglobin dissociation curve.
Discuss the physics of varicose veins
Discuss the Pressure-Volume curve of the heart
What is the afterload and preload of the heart? How are they measured?
What does diastolic and systolic blood pressure mean? Draw a graph which represents blood pressure at various parts of the body.
What are some of the diseases that are caused by high blood pressure?
Discuss the two pulses that are found in the body?
Concerning fetal circulation, the ductus venous, foramen ovale and ductus areriosus seve what function?
Discuss Bernoulis effects within the body
Describe in detail what happens when you take in a breath.
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