Bio Unit 2 Animal Physiology Chp 4 Coordination

OBJR

What are the examples of external environment and internal environment?

External environment 

• CO2 level

• Temperature 

• Light intensity 

• Humidity 

Internal environment 

• Blood glucose level 

• Blood pH

• Blood CO2 concentration 

• Body temperature 

• Body water content

What is meant by homeostasis?

Keeping the internal environment constant.

OBJR

What is meant by term “stimulus” and “receptor”?

Stimulus: Changes in internal or external environment 

Receptor: Detects stimuli by changing their energy into electrical energy in the form of nerve impulses

What is the stimulus in skin?

Pain, pressure, temperature and touch

OBJQ

What are 2 types of nervous system?

Central nervous system: Brain and spinal cord. 

Peripheral nervous system: cranial nerve and spinal nerve

FAQ + OBJQ + OBJR

Explain the reflex action when a person touch hot object.

S R S R C M E R OR

Why receptor convert receptor can convert stimulus original energy to electrical energy?

Label and explain the structure of sensory nerve

Label and explain the structure of relay neurone

Label and explain the structure of motor nerve

What is a synapse?

Junction between 2 neurones

Explain the synapse pathway of nerve impulses between sensory neurones to effector.