1. Bioenergetics - Respiration & Exercise

Question 1

What type of reaction is Respiration?

Answer 1

Respiration is an EXOTHERMIC REACTION

. It releases ENERGY from GLUCOSE for use by the BODY

Question 2

What do we need RESPIRATION for?

Answer 2

We need respiration for:

. for MOVEMENT

. to keep WARM

. for CHEMICAL REACTIONS to build larger MOLECULES

Question 3

RESPIRATION in cells can be:

Answer 3

RESPIRATION in cells can be:

1. AEROBIC - (WITH oxygen)
2. ANAEROBIC ( WITHOUT oxygen)

Question 4

Formulae for Aerobic Respiration

Answer 4

Glucose + Oxygen = Carbon dioxide + water

Question 5

ANAEROBIC the GLUCOSE is NOT COMPLETELY broken down this means that:

Answer 5

During Anaerobic respiration, GLUCOSE is not completely broken to that:

In ANIMALS - LACTIC ACID is formed

In PLANTS - ETHANOL + CO2 is formed

Question 6

What is the ANAEROBIC RESPIRATION in YEAST called?

Answer 6

The ANAEROBIC Respiration in YEAST is called …. F E R M E N T A T I O N

This is important in the manufacture of BREAD

Question 7

WHAT is ETHANOL?

Answer 7

Ethanol is the type of ALCOHOL made by FERMENTATION

Question 8

What is the CO2 used for during FERMENTATION?

Answer 8

A product of FERMENTATION is CO2 - this can be used to make DRINKS FIZZY

Question 9

What happens during exercise?

Answer 9

During exercise:

. The body requires more ENERGY

. HEART RATE, BREATHING RATE & VOLUME increase to supply the MUSCLES with more OXYGEN & GLUCOSE

. Vigorous activity the MUSCLES may not get enough OXYGEN so ANAEROBIC respirations starts to take place in the MUSCLES

. Get a build up of LACTIC ACID - causes the muscles to HURT& stop them CONTRACTING EFFICIENTLY

.

Question 10

Why might your muscles hurt if you run a long race?

Answer 10

Your muscles may hurt when you run a long race because of the

Build up of LACTIC ACID in the muscles leading to CRAMPS

The body is not getting enough OXYGEN & so ANAEROBIC respiration takes over

Question 11

What is the waste product of anaerobic respiration in animals?

Answer 11

The waste product of respiration in animals is ……

LATIC ACID

Question 12

How can you help to get the body to get rid of LACTIC ACID?

Answer 12

DEEP BREATHING can help the body to get rid of LACTIC ACID during demanding exercise.

Question 13

WHAT IS METABOLISM?

Answer 13

Metabolism is the SUM of all the CHEMICAL REACTIONS in a CELL or in the BODY

Question 14

What is the function of ENZYMES?

Answer 14

ENZYMES: SPEED UP reactions.

Question 15

What are ENZYMES used for:

Answer 15

ENZYMES are used to:

1. Convert GLUCOSE to STARCH, GLYCOGEN & CELLULOSE
2. To use GLUCOSE & NITRATE IONS to form AMINO ACIDS (PROTEIN)