IGCSE Nervous system

What term describes a change in the environment of an organism?

Identify the structure that detects a stimulus

• Receptor

• Spinal cord

• Motor neurone

• Effector

Identify the cell that carries a nerve impulse from the central nervous system to an effector

• Receptor

• Relay neurone

• Sensory neurone

• Motor neurone

Identify the structure in the image

Identify the neurone that carries a nerve impulse from a receptor towards the central nervous system

• Sensory neurone

• Motor neurone

• Relay neurone

• Synapse

What term describes a reflex action because it occurs without thinking?

Identify the structure in a neurone that is a long thin fibre

• Myelin sheath

• Axon

• Cell body

• Dendrites

Identify the term for the chemical released by vesicles that crosses the synaptic gap

• Haemoglobin

• Insulin

• Glucose

• Neurotransmitter

Identify the process by which the chemical (neurotransmitter) crosses the synaptic gap

• Osmosis

• Mitosis

• Diffusion

• Active transport

Which of the following is a learned reflex?

• Cycling

• Swallowing

• Pupil reflex

• Knee jerk reflex