wroksheet

Food for Thought 2.1: Digestion

1. Digestion of this nutrient begins in the mouth.

2. Mechanical churning of food occurs in this pouch

3. Most absorption of nutrients takes place here.

4. This sac-like structure secretes bile to aid in fat di

5. Specialized membrane glucose carrier proteins.

6. Bacteria acts on undigested food in this portion of

7. This enzyme breaks down starch in the mouth.

8. This nutrient passes across cell membranes using

9. These monosaccharides require active transport to

10. This monosaccharide uses facilitated diffusion to

11. A lipid that contains a glycerol with three attached

12. The name for the fatty acids once they are cleaved

13. A lipid compound that carries triglycerides throug

14. A collection of amino acids found in body fluids a

15. These molecules do not require breakdown into sm

Thought 2.2: Understanding Bioenergetics

After reading the example below, see if you can answ

who is boxing.

Carrie is standing at the starting line awaiting the s

Half Marathon. In the initial 5 seconds as she begins t

systems begin to respond to the increased need for ene

-like portion of the digestive tract.

gestion.

the digestive tract.

passive diffusion.

diffuse across cell membranes.

pass through cell membranes.

fatty acids.

off the glycerol.

h the intestinal cells.

nd tissues.

aller units for absorption.

er the questions regarding someon

tarter’s gun to begin the Indian

o accelerate to race pace, the 3 e

rgy. The immediate ATP needs ar

e

ap

ne

e

olis

rgy

met

initially by the muscle’s existing stores of ATP and creatine phosphate, which constitute what

is known as the muscle cell’s phosphagen energy system. Almost as quickly, the anaerobic

energy system begins metabolizing carbohydrates for energy, and starts to contribute

towards the increased need for ATP. About 2 minutes into the race, the aerobic energy

system has had time to ramp up its production of ATP and begins to produce mos t of the

energy Carrie’s muscles need. Fats and carbohydrates are the primary macronutrients

metabolized by the aerobic energy system during the race. The other 2 energy systems back

off and play only a minor role in supplying the needed ATP from then on.

1. During a 3-minute boxing round, identify which energy system is the predominant system

being used to fuel the specific activity described below:

A. First punch within 3 seconds of starting the round--

B. A continuous flurry of jabs and fast moves lasting a

minutes into the round—

C. During the last 30 seconds of a 3-minute round, wh

around the ring

2. For each of the energy systems you listed above, list whi

A. First punch within 3 seconds of starting the rou

B. A continuous flurry of jabs and fast moves last

minutes into the round--

C. During th f 3 minute round, wh

ring—

D. Sitting on the stool in the corner of the ring durin

rounds—

bout 30 seconds after 1.5

ile moderately moving

t(s) is being utilized.

nd—

ing about 30 seconds after 1.5

ile moderately moving around the

g the 1-minute rest between

ch macronutrien

e last 30 seconds o

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