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12 Cards in this Set

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What is the function of enzymes?

Enzymes act as very efficient catalysts for biochemical reactions.

Enzymes act as very efficient catalysts for biochemical reactions.

What are enzymes composed of?

Enzymes are primarily composed of proteins, which are polymers of amino acids.

How are enzymes protected against changes in A. Temperature? B. Acidity level?

A. Hypothalamus
B. Proteins within cells absorb acid/the respiratory system/kidneys

A. Hypothalamus


B. Proteins within cells absorb acid/the respiratory system/kidneys

What happens to enzymes when A.Temp? ^B. Acidity^?

A.^37.5 Bonds break (denature)


B.Changes shape/effectiveness of enzyme.

Where is the thermoregulatory centre located?

The hypothalamus.

The hypothalamus.

3 major mechanisms for controlling acidity in tissues

Proteins
Respiratory system
Renal ystem

Proteins


Respiratory system


Renal ystem

Two substances dissolved in blood plasma that are regulated by hormones?

Glucose
Calcium

Glucose


Calcium

State the homeostatic set point for blood glucose.

5mmol/L

5mmol/L

Name the four basic components of a homeostatic control system.

Sensors


Control Centre


Effectors


Feedback loops

A. State a narrow range parameter:


B. State a wide range parameter:

A. Blood calcium: 2.2-2.6 mmol/L
B. Blood volume: 52-83ml/Kg

A. Blood calcium: 2.2-2.6 mmol/L


B. Blood volume: 52-83ml/Kg

Name the two major classes of drugs that may be used to correct homeostatic imbalances.

Agonists and antagonists.

Agonists and antagonists.

Where do these drugs act to exert their influence?

Receptors.