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Flashcards in Fat Deck (25):
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Reesterification

Process where new triglycerides are formed in adipose tissue

1

Intramuscular triglycerides

Typically located adjacent to mitochondria in muscle tissue

2

Hormone – sensitive lipase

Liberates FA's from IMTGs within muscle tissue

3

Carnitine

Transport FA's to the mitochondria

4

Lipoysis

The breakdown of triglycerides into FA's and glycerol

5

B – oxidation pathway

Acetyl-CoA is split in the mitochondria to produce ATP

6

Glycerol

Used in the liver to produce new glucose

7

List the four major Storage forms of fat in the human body in order from lowest potential energy storage to greatest potential energy storage

A) plasma FA's
B) plasma triglycerides
C) intramuscular triglycerides (IMTG's)
D) Adipose tissue

8

_______ muscle fibers have a greater concentration of IMTG's which are typically located adjacent to _____ within the tissue.

Type 1, mitochondria

9

True or false?
During resting conditions, 30% of FA's are reesterfied inside adipose tissue.

False

10

List for adaptations that promote enhanced fat oxidation in the muscle tissue of aerobically trained individuals

A) increased mitochondrial density and oxidative enzymes in trained muscle
B) increased capillary density
C) increased F a transporter concentrations in the sarcolemma of muscle

11

True or false?
CHO intake before exercise reduces FA utilization during exercise

True

12

What two major factors regulate fat metabolism during exercise

A) fat availability
B) The rate of CHO utilization

13

MCTs are popular among bodybuilders as they are not _______ and provide significant ________

Preferentially stored in the body
Energy

14

True or false?
Facial oil has been shown to improve cellular membrane function and provides omega-6 essential fatty acid's

False

15

Triglycerides are broken down into which of the following to be used for energy?
A) enzymes and cholesterol
B) fatty acid's in glycerol
C) glucose and polyunsaturated fatty acid
D) Keytone bodies and ATP

B) fatty acid and glycerol

16

Which of the following is not a source from which FA's can be derived and then utilize during exercise?
A) adipose tissue triglycerides
B) circulation
C) IMTGs
D) glycerol

D) glycerol

17

Which of the following is the primary transporter of FAs in the bloodstream?

A) Carnitine
B) plasma triglycerides
C) very low density lipoprotein's (VLDLs)
D) albumin

D) Albumin

18

Which of the following is not a step involved in fat metabolism?

A) adrenal hormones stimulate lipolysis in adipose tissue to liberate FAs and glycerol.
B) FAs are removed from adipose with adequate blood flow and albumin concentration.
C) protein carriers function to transport FAs across the sarcolemma of muscle cells.
D) FAs in muscle cytoplasm are enzymatically triggered to form carnitine

D) FAs in muscle cytoplasm are enzymatically triggered to form carnitine

19

Maximal fat utilization during exercise is seen at approximately which intensity?

A) 40% of VO2 max
B) 50%
C) 60%
D) 70%

C) 60% of VO2 max

20

Which of the following would not promote increased fat utilization as a fuel during exercise?

A) lower level of aerobic fitness
B) lower exercise intensity
C) longer exercise duration
D) engaging in a high-fat, low carb diet

A) lower level of aerobic fitness

21

Which of the following forms of nutritional fat can contribute to energy during exercise?

A) phospholipids
B) cholesterol
C) MCTs
D) Fish oil

C) Medium chain triglycerides

22

Which of the following is an undesirable effects of LCT indigestion during exercise?

A) they slow gastric emptying
B) are released into circulation that a very slow rate
C) enter circulation bound to chylomicrons which are believed to be an insignificant fuel source
D) all of the above

D) all of the above

23

Which of the following selections related to fasting is incorrect?

A) fasting increases the availability of lipid substrates
B) fasting significantly reduce his performance at high-intensity's
C) resting decreases FA oxidation at rest and during exercise
D) fasting lowers liver glycogen stores

C) fasting decreases FA oxidation at rest and during exercise

24

Which of the following supplements is believed to stimulate like a lyses and enhance mobilization of FA's?

A) pyruvate
B) chromium
C) Carnitine
D) caffeine

D) caffeine