Intro. to Physiology
Maintaining a stable internal environment by returning the body to a normal setpoint is the primary goal of this process.
What is homeostasis?
A neuron’s resting membrane potential of -70 mV occurs primarily because the membrane is most permeable to this ion.
What is potassium (K+)?
These three muscle types include the ones responsible for body movement, blood flow, and heart pumping.
What are skeletal, smooth, and cardiac muscle?
These 4 components make up the cardiovascular system
What is the heart, blood vessels, blood cells and plasma?
Loose, dense, adipose, blood, and supporting are the five types of this tissue category.
What is connective tissue?
During the repolarization phase of an action potential, these channels open while sodium channels inactivate.
What are voltage-gated potassium channels?
This theory describes how thin filaments slide along thick filaments to shorten the sarcomere.
What is the sliding filament theory of contraction?
The left atrium receives blood from the pulmonary veins, while the right atrium receives blood from these vessels.
What are the superior and inferior vena cava?
Controlling the diameter of blood vessels in response to low oxygen is an example of this type of control.
What is local control?
One of these cells can myelinate multiple axons in the CNS, while the other can myelinate only a single axon in the PNS
What are oligodendrocytes and Schwann cells?
Z-line, I band, A band, H zone, and M line make up this repeating unit of muscle structure.
What is the sarcomere?
These specialized pacemaker cells, found in the SA node, generate spontaneous action potentials in the heart.
What are autorhythmic cells?
This type of signaling acts on neighboring cells, while the other acts on the same cell.
What are paracrine and autocrine signaling?
The absolute refractory period occurs because this gate of the voltage-gated sodium channel is closed.
: What is the inactivation gate?
This 7-step process explains how actin and myosin interact during muscle contraction.
What is the crossbridge cycle?
This circuit carries deoxygenated blood to the lungs and returns oxygenated blood to the heart.
What is the pulmonary circuit?
This state occurs when the body’s homeostatic mechanisms fail to self-correct.
What is pathophysiology?
In the parasympathetic division, this neurotransmitter is released by postganglionic neurons and binds to this receptor on the effector organ.
What is acetylcholine binding to a muscarinic receptor?
Depolarization, initial repolarization, plateau, rapid repolarization, and resting potential describe the phases of this specialized muscle’s contraction.
What is cardiac muscle contraction?
This test records the heart’s electrical activity using skin electrodes and shows P, QRS, and T waves.
What is an electrocardiogram (ECG or EKG)?