Chapter 6 (page 33) Flashcards Preview

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Flashcards in Chapter 6 (page 33) Deck (18):
1

__________ make up the bulk of cellular structures. __________ are broken down in AA. The cells remove the AA from the blood and use them to _______ proteins in the body.

Proteins
Ingested proteins
build

2

What happens to proteins when used for energy?

When AA are used for energy, amine groups are removed as ammonia . The rest of the molecules enter the Krebs cycle.
The ammonia is released during the process, it can be toxic to body cells especially nerve cells.
The liver comes to the rescue by combining the ammonia with CO2 to form urea, which flushes out in the urine.

3

It is formed by combining ammonia and Carbon dioxide.

Urea

4

What the liver does to prevent toxic effects of ammonia?

The liver comes to the rescue by combining the ammonia with CO2 to form urea, which flushes out in the urine.

5

_____________ Is the rate at which food is catabolized under basal conditions. Is the number of calories of heat that must be produced per hour to keep the body alive, awake and warm. The body is not trying to digest or adjust to temperatures.


Basal Metabolism Rate (BMR):

6

What is Total Metabolism Rate (TMR)?

Total amount of energy used by the body per day.

7

When the number of calories equals your TMR your weight remains the same. Then, when calories are more than your TMR, you ____________ .

gain weight

8

When a person lose weight. What happens to the calories?

Calories are less than TMR

9

What is the percentage of energy the body uses to maintain body temperature?

more than 60% of energy

10

Maintaining body temperature is regulated by the ______________ .

Hypothalamus

11

What is the normal body temperature in Celsius?

36.2 - 37.6 degrees Celsius

12

What is 97 - 100 degrees Fahrenheit in Celsius?

36.2 - 37.6 degrees Celsius

13

Protect the body from excessively high temperature.

Heat-loss mechanisms

14

Heat loss of (80-90%) is through the ________ .The other 10-20% is lost through __________ .

skin
breathing

15

It results from activation of heat loss centers:

When heat loss centers are activated it triggers the vasodilation of cutaneous blood vessels. Vasomotor fibres serving blood vessels of the skin allows the vessels to dilate. As the skin vasculature swells with warm blood

16

Heat loss happens in different ways such as through:

Radiation
Conduction
Convection
Evaporation

17

____________ - This is direct contact that promotes heat loss. Heat is transferred from the surface of one object to the surface of another object.

Conduction

18

____________ - Most heat is lost through radiation. Heat radiates from the body to cooler surface areas. Heat is transferred from the surface of one object/area to another without contact between them.

Radiation