Unit 15| Control and Coordination Definition

Front

Neurone

Back

A cell specialized to transmit electrical impulses.

Front

Synapse

Back

Junction between two neurones where neurotransmitters carry impulses.

Front

Action potential

Back

Rapid change in membrane potential during nerve impulse transmission.

Front

Resting potential

Back

Electrical potential difference across neurone membrane when not transmitting an impulse.

Front

Refractory period

Back

Time after an action potential when a neurone cannot fire again immediately.

Front

Saltatory conduction

Back

The jumping of action potentials between nodes of Ranvier in myelinated neurones.

Front

Sarcomere

Back

Structural unit of a myofibril in striated muscle, responsible for contraction.

Front

Troponin and Tropomyosin

Back

Regulatory proteins controlling the exposure of actin binding sites.

Front

Acetylcholine (ACh)

Back

Neurotransmitter released at cholinergic synapses.

Front

Auxin

Back

Plant hormone that promotes cell elongation by loosening cell walls.