💓 Physiology — Intermediate#

Scope — Mechanisms of system regulation, transport processes, and integration of neural and endocrine signaling.

Key concepts#

• Neural vs endocrine control — fast, localized signaling versus slower, systemic regulation.
• Transport mechanisms — diffusion, facilitated transport, active transport across membranes.
• System integration — coordination among cardiovascular, respiratory, renal, and nervous systems.

Seed Q&A triads#

• Q: How do neural and endocrine systems differ in speed and duration of action?
  A: Neural signals act rapidly and briefly via action potentials; endocrine signals act more slowly but have longer-lasting effects via hormones.

• Q: Why is the cardiovascular system central to physiological integration?
  A: It transports gases, nutrients, hormones, and wastes, linking all tissues and organ systems.

• Q: How do kidneys contribute to homeostasis beyond waste removal?
  A: They regulate fluid balance, electrolytes, blood pressure, and acid–base status.

Short exercises#

• Trace how a change in blood CO₂ levels influences breathing rate through neural feedback pathways.