AP Bio Unit 4

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is the role of a stimulus in biological systems?

Back

A stimulus is an external factor that causes a response in an organism, triggering physiological changes.

Front

What is negative feedback in homeostasis?

Back

Negative feedback is a mechanism that reduces the output of a system to bring it back to its set point, helping to maintain stability.

Front

What is endocrine signaling?

Back

Endocrine signaling is a form of long-distance communication in which hormones are released into the bloodstream to target distant organs.

Front

What is paracrine signaling?

Back

Paracrine signaling is a form of local communication where cells secrete signals that affect nearby target cells.

Front

What is autocrine signaling?

Back

Autocrine signaling is when a cell secretes a signal that binds to its own receptors, affecting its own activity.

Front

What is synaptic signaling?

Back

Synaptic signaling is a form of communication between neurons where neurotransmitters are released across a synapse to transmit signals.

Front

What is the difference between local and long-distance signaling?

Back

Local signaling affects nearby cells (e.g., paracrine and autocrine), while long-distance signaling involves hormones traveling through the bloodstream to distant targets.

Front

What is the significance of shivering in response to cold?

Back

Shivering is a physiological response that generates heat to increase body temperature when the environment is cold.

Front

What is the effect of negative feedback on physiological systems?

Back

Negative feedback helps to stabilize physiological systems by counteracting changes and maintaining equilibrium.