BY4: Control systems/ Excretion

HideShow resource information
  • Created by: DDOB
  • Created on: 21-04-15 12:14
What is excretion
The removal of the waste products of metabolism from the body
1 of 19
What are the two main excretory products produced by mammals?
Carbon dioxisde and nitrogenous waste from the breakdown of excess amino acids.
2 of 19
What are the two main functions of the mammilian kidney?
The excretion of urea and the regulation of the water potential of the blood
3 of 19
What is ammonia?
A small, sokuble and highly toxic substance. It cannot be stored safely and needs large volumes of water to be diluted.
4 of 19
How do freshwater fish excrete?
Ammonia diffuses out of the gills
5 of 19
What do mammals excrete?
UREA
6 of 19
How is producing urea an adaptation to life on land?
It prevents dehydration
7 of 19
Which animals excrete uric acid?
Reptiles, Birds and insects.
8 of 19
what is ultrafiltration?
The removal of water and small soluted from the blood.
9 of 19
What does the basement membrane surrounding the capillary walls of the glomerulus act as?
A molecular filter.
10 of 19
what are the cells that line the inner layer of the bowmans capsule
podocytes.
11 of 19
How is the proximal convulted tubule adapted for selective reabsorbtion of solutes?
They possess microvilli to provide a large surface area. They also contain mitochondria for ATP for the active transport of solutes.
12 of 19
What is the function of the loop of Henle
To conserve water.
13 of 19
What is homeostasis
The mechanisms that bring about the maintenance of a constant internal environment
14 of 19
What does a receptor do?
Detects a stimulus
15 of 19
What does the coordinator do?
Recieves information from the recpetor and initiates the corrective mechanism
16 of 19
What does the effector do?
Carreis out the corrective procedure and restores the norm.
17 of 19
what is osmoregulation?
The control of water and solute concentration of the blood
18 of 19
Describe the Path of ADH when sweating occurs
Low water potential > osmoreceptors in hypothalamus > posterior pituitary gland > increased ADH secretion > increased permeability of distil convuluted tubule and the collecting duct > more water reabsorbed . normal blood water potential
19 of 19

Other cards in this set

Card 2

Front

What are the two main excretory products produced by mammals?

Back

Carbon dioxisde and nitrogenous waste from the breakdown of excess amino acids.

Card 3

Front

What are the two main functions of the mammilian kidney?

Back

Preview of the front of card 3

Card 4

Front

What is ammonia?

Back

Preview of the front of card 4

Card 5

Front

How do freshwater fish excrete?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Control systems/ Excretion resources »