Impact of Photosynthesis and Neurotransmission on Ecosystem Dynamics and Physiology

Flashcards covering key concepts related to photosynthesis, action potentials, and hormonal responses in plants and animals, based on lecture notes.

Photosynthetic Efficiency

The rate at which plants convert light energy into chemical energy through photosynthesis, which can be affected by environmental factors like climate change.

Balsam Fir Trees

A species of tree that plays a critical role in the food chain, providing food and habitat for various organisms.

Action Potential

A rapid change in the membrane potential of a neuron that propagates along the axon, enabling communication within the nervous system.

Tetrodotoxin (TTX)

A potent neurotoxin that blocks voltage-gated sodium channels, affecting neural signaling in organisms.

GABA (Gamma-aminobutyric acid)

An inhibitory neurotransmitter that helps regulate neuronal excitability and muscle control.

Abscisic Acid

A plant hormone that promotes stomatal closure and inhibits growth during stress conditions, aiding plant survival.

Neurotransmitter

Chemical messengers that transmit signals across a synapse from one neuron to another or to target cells.

Predator-Prey Dynamics

The interactions between predators (wolves) and their prey (moose), which influence population stability and survival rates.

Stomatal Closure

The process whereby plants close their stomata to prevent water loss, often in response to stress factors like drought.

Hyperpolarization

An increase in a cell's membrane potential, making it more negative and decreasing the likelihood of action potential firing.