Homeostasis And The Kidney

Question 1

What is homeostasis?

Answer 1

The maintenance of constant internal environment within a living organism, irrespective of external conditions

Question 2

What are some examples of homeostasis?

Answer 2

Regulation of blood sugar levels, regulation of core body temperature and pH and regulation of water levels

Question 3

What is the set point?

Answer 3

The desired level at which the system operates, which the levels of things such as temperature and pH usually fluctuate around

Question 4

What is negative feedback?

Answer 4

When a receptor detects a deviation from a set point, and information is sent to a control centre which coordinates a response to return levels back to the set point

Question 5

What is positive feedback?

Answer 5

A receptor detects a decrease in the body levels from the set point, so effectors increase this back to the set point

Question 6

What is nitrogenous excretion?

Answer 6

A function of the kidney, where amino acids are deaminated in the kidney.
1.Amine group is removed from amino acid
2.The removed amine group is converted to ammonia
3.With the addition of CO2, urea is formed and transported in the blood plasma to kidneys
4.Urea is removed by the kidneys and excreted in the urine