The long plateau phase of the cardiac muscle action potential is due to Group of answer choices increased membrane permeability to sodium ions. calcium channels remaining open. movement of fewer sodium ions across the cell membrane. decrease in the amount of calcium diffusing across the membrane. increased membrane permeability to potassium ion.

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.