Lecture 1

Question 1

How is a constant fluid environment achieved?

Answer 1

Homeostasis

Question 2

Is ion content the same in intracellular and extracellular fluids?

Answer 2

No its opposite

Question 3

Why is osmolality the same in all fluids?

Answer 3

This prevents unregulated osmosis

Question 4

What does homeostasis control in the whole body?

Answer 4

Arterial blood pressure
Blood volume

Question 5

What does homeostasis control in internal environment?

Answer 5

Plasma level of O2
Plasma level of nutrients
Plasma levels of electrolytes
Core temperature

Question 6

What does homeostasis control at a cellular level?

Answer 6

ATP
Ions

Question 7

What are the 4 homeostasis components?

Answer 7

Receptors
Control centre
Output
Effector

Question 8

What are the 4 homeostasis components?

Answer 8

Receptors
Control centre
Output
Effector

Question 9

In which direction is negative feedback?

Answer 9

Towards the parameter

Question 10

In which direction is positive feedback?

Answer 10

Further from the parameter

Question 11

What is the definition of a drug?

Answer 11

A chemical substance of known structure, which, when administered to a living organism, produces a biological effect.