WorksheetsOCR Biology - Exchange and Animal Transport
Total questions: 15
Worksheet time: 5mins
When you listen to a heartbeat you hear a LUB-DUB sound. What is the LUB sound?
Closing of the AV valves
Sound of blood rushing into Atria
Sound of blood rushing into Ventricles
Closing of Semilunar valves
CO2 is converted into carbonic acid in the cytoplasm of red blood cells by the enzyme...
haemocyanin
carbonic anhydrase
oxyhaemoglobin
oxyanhydrase
Which of the following is not a way to increase the efficiency of a respiratory system?
increase the surface area available for diffusion of gases
decrease the distance over which the gases must diffuse
dry the system so gases don't have to diffuse through water
all of these will increase efficiency
The majority of carbon dioxide is transported in the blood...
Dissolved in the plasma
Combined with haemoglobin to form carbaminohaemoglobin
Bound to oxygen molecules
Converted into H2CO3- ions
In a countercurrent exchange system the fluids flow the same way.
True
False
which of these is a passive process?
Inspiration
Expiration
Forced expiration
Forced inspiration
Match the definition- The volume of air breathed in and out in normal resting conditions.
Tidal volume
Vital capacity
Residual volume
Peak flow
Where does most gas exchange occur in insects?
Spiracles
Trachea
Lungs
Tracheoles
A circulatory system where blood travels through the heart once in a circuit
Single
Double
Open
Closed
What are the blood cells that transport oxygen?
Fibrinogen
Leukocytes
Erythrocytes
Phagocytes
What separates the left and right sides of the heart?
Semilunar valve
Septum
Mitral valve
Bicupsid valve
Correct order...?
SAN, AVN, delay, bundle of His, Purkyne fibres
SAN, delay, AVN, bundle of His Purkyne fibres
SAN, AVN, bundle of His, delay, Purkyne fibres
SAN, AVN, delay, purkyne fibres
Which of these does not happen during inspiration?
Diaphragm contracts
Volume of thorax increases
Internal intercostal muscles contract
Pressure of thorax decreases
In which type of circulatory system is the transport medium loose in the body cavity?
Single
Double
Open
Closed
Which of these statements is incorrect
Foetal haemoglobin has a higher affinity for oxygen than adult haemoglobin
At higher partial pressures of oxygen, blood has a higher affinity for oxygen
At higher partial pressures of CO2, haemoglobin has a higher affinity for oxygen
Blood has a lower affinity for oxygen at low partial pressures of oxygen
