Biol 101 study guide on the digestive system
Resources:
● The online textbook Biology-2e can be downloaded from OpenStax at:
https://openstax.org/details/books/biology-2e
● Chapter 34 (p. 964)
Learning goals:
● Explain the purpose of the body mass index and identify some of its limitations.
● Identify and discuss the four stages of food processing.
● Distinguish between physical (mechanical) digestion and chemical digestion.
● Identify and explain the function of the alimentary canal and accessory organs of the digestive
system.
● Identify the origin, final destination, and function of the various digestive enzymes discussed.
● Discuss the cause, symptoms, and treatments for common gastro-intestinal conditions.
● Applications: Body mass index Bariatric surgeries Peptic ulcers Heartburn
1. The body mass index (BMI) allows doctors to generally access how healthy a person’s weight is
based on basic information such as a person’s height and weight (see below).
Available online at WebMD: http://www.webmd.com/a-to-z-guides/body-mass-index-bmi-for-adults
C. Duong Page 1 of 9
, For individuals who are obese with a BMI of 40 or higher, or for individuals whose BMI is between 35-39.9
and have serious weight-related health problems, bariatric procedures are an option.
a. What is bariatric surgery?
Your BMI has to be 40 or higher to qualify for this surgery. This is a weight loss surgery.
b. Examine the popular bariatric procedures: gastric bypass (Roux-en-Y) and lap-band. Briefly explain
each one aids in weight loss. What are the pros and cons for each?
Gastric bypass Lap-band
Description of procedure:
1. Restrictive procedure because it reduces
the size of your stomach to about 1 cup.
Makes you feel fuller, faster.
2. Also called malabsorptive procedure
because you will bypass (skip) part of the Description of procedure:
small intestine. Absorb fewer calories, 1. Restrictive procedure; decrease stomach
promote weight loss size by placing a band around it
PROS CONS PROS CONS
1. Decrease in
absorption of
vitamins and
minerals (dry
skin, hair loss). Slower results
2. “Dumping
Faster weight loss syndrome” is any Not as effective
results discomfort felt Less invasive
during eating Band can damage outer
Reduce medical (nauseated, Less downtime part of the stomach
conditions linked with abdominal pain,
obesity (diabetes, high bloating) Reversible Placed for 6 months in
BP, heart disease, etc) 3. Irreversible the body
C. Duong Page 2 of 9
Resources:
● The online textbook Biology-2e can be downloaded from OpenStax at:
https://openstax.org/details/books/biology-2e
● Chapter 34 (p. 964)
Learning goals:
● Explain the purpose of the body mass index and identify some of its limitations.
● Identify and discuss the four stages of food processing.
● Distinguish between physical (mechanical) digestion and chemical digestion.
● Identify and explain the function of the alimentary canal and accessory organs of the digestive
system.
● Identify the origin, final destination, and function of the various digestive enzymes discussed.
● Discuss the cause, symptoms, and treatments for common gastro-intestinal conditions.
● Applications: Body mass index Bariatric surgeries Peptic ulcers Heartburn
1. The body mass index (BMI) allows doctors to generally access how healthy a person’s weight is
based on basic information such as a person’s height and weight (see below).
Available online at WebMD: http://www.webmd.com/a-to-z-guides/body-mass-index-bmi-for-adults
C. Duong Page 1 of 9
, For individuals who are obese with a BMI of 40 or higher, or for individuals whose BMI is between 35-39.9
and have serious weight-related health problems, bariatric procedures are an option.
a. What is bariatric surgery?
Your BMI has to be 40 or higher to qualify for this surgery. This is a weight loss surgery.
b. Examine the popular bariatric procedures: gastric bypass (Roux-en-Y) and lap-band. Briefly explain
each one aids in weight loss. What are the pros and cons for each?
Gastric bypass Lap-band
Description of procedure:
1. Restrictive procedure because it reduces
the size of your stomach to about 1 cup.
Makes you feel fuller, faster.
2. Also called malabsorptive procedure
because you will bypass (skip) part of the Description of procedure:
small intestine. Absorb fewer calories, 1. Restrictive procedure; decrease stomach
promote weight loss size by placing a band around it
PROS CONS PROS CONS
1. Decrease in
absorption of
vitamins and
minerals (dry
skin, hair loss). Slower results
2. “Dumping
Faster weight loss syndrome” is any Not as effective
results discomfort felt Less invasive
during eating Band can damage outer
Reduce medical (nauseated, Less downtime part of the stomach
conditions linked with abdominal pain,
obesity (diabetes, high bloating) Reversible Placed for 6 months in
BP, heart disease, etc) 3. Irreversible the body
C. Duong Page 2 of 9
