What is depolarization?

Depolarization the change in a cell’s electrical charge when it becomes less negative inside, allowing an action potential to start.The phase when sodium (Na⁺) rushes into the cell, making the inside more positive and triggering the electrical signal.

What is repolarization?

Repolarization is the process where a cell restores its negative internal charge after depolarization. This happens when potassium (K⁺) leaves the cell, making the inside more negative again and returning the cell to its resting state.

What is hyperpolarization?

Hyperpolarization is when the inside of the cell becomes more negative than its normal resting state. This happens because extra potassium (K⁺) leaves the cell, making it harder for the cell to fire another action potential right away.

What is the Sympathetic Nervous System ?

The Sympathetic Nervous System is the “fight or flight” part of the autonomic nervous system. It prepares the body for stress or emergencies by increasing heart rate, dilating airways, raising blood pressure, and releasing energy.

What is the Parasympathetic Nervous System?

The Parasympathetic Nervous System is the “rest and digest” part of the autonomic nervous system. It slows the heart rate, increases digestion, and supports energy storage and relaxation.

What is Angiotensin II?

Angiotensin II is a hormone in the renin angiotensin aldosterone system (RAAS). It raises blood pressure by causing blood vessels to constrict, stimulating the release of aldosterone and ADH, and increasing thirst.

Aldosterone is a hormone released from the adrenal cortex that increases sodium reabsorption and potassium excretion in the kidneys.

ADH is a hormone released from the posterior pituitary that directly increases water reabsorption in the kidneys, producing less urine and increasing blood volume and blood pressure.

What is active immunity?

Active immunity occurs when the body produces its own antibodies after exposure to a pathogen or a vaccine. It develops more slowly but provides long-lasting or lifelong protection.

What is passive immunity?

Passive immunity occurs when antibodies are transferred from another source rather than produced by the person’s own immune system. It provides immediate but temporary protection.

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Stephanie Echaves

Phys 7-13

Question	Answer
What is depolarization?	Depolarization the change in a cell’s electrical charge when it becomes less negative inside, allowing an action potential to start.The phase when sodium (Na⁺) rushes into the cell, making the inside more positive and triggering the electrical signal.
What is repolarization?	Repolarization is the process where a cell restores its negative internal charge after depolarization. This happens when potassium (K⁺) leaves the cell, making the inside more negative again and returning the cell to its resting state.
What is hyperpolarization?	Hyperpolarization is when the inside of the cell becomes more negative than its normal resting state. This happens because extra potassium (K⁺) leaves the cell, making it harder for the cell to fire another action potential right away.
What is the Sympathetic Nervous System ?	The Sympathetic Nervous System is the “fight or flight” part of the autonomic nervous system. It prepares the body for stress or emergencies by increasing heart rate, dilating airways, raising blood pressure, and releasing energy.
What is the Parasympathetic Nervous System?	The Parasympathetic Nervous System is the “rest and digest” part of the autonomic nervous system. It slows the heart rate, increases digestion, and supports energy storage and relaxation.
What is Angiotensin II?	Angiotensin II is a hormone in the renin angiotensin aldosterone system (RAAS). It raises blood pressure by causing blood vessels to constrict, stimulating the release of aldosterone and ADH, and increasing thirst.
What is Aldosterone?	Aldosterone is a hormone released from the adrenal cortex that increases sodium reabsorption and potassium excretion in the kidneys.
What is ADH?	ADH is a hormone released from the posterior pituitary that directly increases water reabsorption in the kidneys, producing less urine and increasing blood volume and blood pressure.
What is active immunity?	Active immunity occurs when the body produces its own antibodies after exposure to a pathogen or a vaccine. It develops more slowly but provides long-lasting or lifelong protection.
What is passive immunity?	Passive immunity occurs when antibodies are transferred from another source rather than produced by the person’s own immune system. It provides immediate but temporary protection.

Created by: stephaniee0240

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