Essential Biology 6.1: Digestion
Due Date:
Student Name:
Candidate Number: 0033-
Blog resource: http://tinyurl.com/27dahvl
Cite all sources using the CSE method (or ISO 690 Numerical in Word). The first example has been done for you.
Highlight objective 1 command terms in yellow and complete these before class. Highlight objective 2 and 3
command terms in green. These will be discussed in class.
Complete the self-assessment rubric before submitting to Moodle. Avoid printing this if possible.
1. Define the following terms, giving an example of each.
Macromolecule
“large molecules made up of smaller organic molecules. There are four classes of
macromolecules: carbohydrates, lipids, proteins and nucleic acids” (1)
Ingestion
Digestion
Absorption
Assimilation
Excretion
Egestion
Enzyme
Substrate
Optimum pH
Lipase
Protease
Amylase
2. Explain the need for digestion of large food molecules. (3 marks)
Adapted from works by Stephen Taylor
Essential Biology 6.1: Digestion
Due Date:
Student Name:
Candidate Number: 0033-
3. State the name of the type of reaction which uses water to break down a macromolecule.
o
4. Explain the need for enzymes in digestion of large food molecules. (5marks)
5. Review: Explain three factors that affect the rate of enzyme activity. (8 marks)
6. State the source, substrate, products, and optimum pH for the following types of enzymes:
Substrate
Carbohydrase (amylase)
Lipase
Protease
Carbohydrates
Lipids/ fats
Proteins
Example of
enzyme
trypsin
Product(s)
Source of
enzyme
Optimum
pH
Adapted from works by Stephen Taylor
pancreas
Essential Biology 6.1: Digestion
Due Date:
Student Name:
Candidate Number: 0033-
7. Label and state the function of the structures of the digestive system below:
Name
Function
a.
Salivary glands
Secrete saliva, includes amylase to being digestion of
starch.
b.
c.
d.
e.
f.
g.
Small intestine
(duodenum)
h.
i.
j.
k.
8. Outline the functions of the stomach and small intestine.
Stomach
Acid
Mechanical Digestion
Enzyme
Small intestine
Neutralisation of
chyme
Enzymes
Duodenum
Ileum
Adapted from works by Stephen Taylor
Essential Biology 6.1: Digestion
Due Date:
Student Name:
Candidate Number: 0033-
Peristalsis
9. The small intestine is made up of many finger-like projections called villi.
a. Distinguish between absorption and assimilation.
b. Label the structures of the villus below.
c. Explain how the structure of the villus is related to its role in absorption and transport of the
products of digestion.
Visible structures
Villi
Function/ effect
Increase surface area for absorption
a.
b.
Not visible (epithelial cells)
Epithelium is one cell thick
c.
Adapted from works by Stephen Taylor
Function/ effect
Short diffusion path of molecules from lumen into blood
Essential Biology 6.1: Digestion
Due Date:
Student Name:
Candidate Number: 0033-
d.
Protein channels in microvilli
Channels for:
Pumps for:
10. Undigested food molecules are passed to the large intestine.
a. Outline the functions of the large intestine.
Large intestine
Folds and Villi
Egestion
b. Distinguish between egestion and excretion.
c. List four materials that are egested in feces.
d. Discuss the benefits of a high-fibre diet.
Adapted from works by Stephen Taylor
Essential Biology 6.1: Digestion
Due Date:
Student Name:
Candidate Number: 0033-
Works Cited
1. Council-Garcia, Cara Lea. Biological Macromolecules. Univesiy of New Mexico Biology. [Online] [Cited:
October 31, 2010.] http://biology.unm.edu/ccouncil/Biology_124/Summaries/Macromol.html.
2. Allott, Andrew. IB Study Guide: Biology for the IB Diploma. s.l. : Oxford University Press, 2007. 978-019-915143-1.
3. Taylor, Stephen. Digestion Core. Science Video Resources. [Online] October 31, 2010.
http://sciencevideos.wordpress.com/bis-ib-diploma-programme-biology/06-human-healthphysiology/digestion/.
Self Assessment:
Essential Biology
Criterion
Presentation &
Organisation
Academic
Honesty
Objective 1
understanding
Objective 2
understanding
Objective3
understanding
Logic, notation,
mathematical
working
Further research
Assessment
Complete (2)
Partially complete (1)
NA
Complete and neat. All command terms
highlighted, tables and diagrams well presented.
Sources cited using the APA (ISO 690 numerical)
method, with Works Cited section complete and
correct.
All answers for the following command terms
Most answers for the following command terms
correct:
correct:
Define
Draw
Label
List
Measure State
Most answers for the following command terms
All answers for the following command terms correct:
correct:
Annotate Apply
Calculate Describe Distinguish Estimate Identify
Outline
Most answers for the following command terms
All answers for the following command terms correct:
correct:
Analyse Comment Compare Construct Deduce Derive Design Determine Discuss
Evaluate
Explain Predict
Show Solve
Sketch Suggest
Answers are presented in a logical and concise
manner. SI units used most times, with correct
NA
unit symbols and definitions of terms. All
mathematical working shown.
Evidence is apparent of research and reading
beyond the textbook and presentations to find
correct answers to challenging questions. If any
NA
questions are unanswered, this criterion scores
zero.
NA
Total (max 10):
Adapted from works by Stephen Taylor
Self
Prof