IB Biology: C3.1 Brain Output to Motor Neurons

Front

What processes information from sensory neurons and makes decisions about movement?

Back

The cerebral hemispheres.

Front

What sends signals to motor neurons for locomotion and posture control?

Back

The primary motor cortex in the frontal lobe of the cerebrum.

Front

What forms synapses with multiple striated muscle fibres at the neuromuscular junction?

Back

Each axon of a motor neuron.

Front

What happens when action potential reaches the neuromuscular junction?

Back

It causes the neurotransmitter acetylcholine to be released.

Front

What does acetylcholine do at the neuromuscular junction?

Back

It initiates contractions of the sarcomeres, leading to muscle shortening and bone movement.