Skeletal
The number of bones in the human body
What is 206?
This chamber of the heart pumps blood to the lungs
What is the right ventricle?
The functional, contractile unit of a muscle fiber
What is a sarcomere?
A motor neuron and all of the muscle fibers it innervates
What is a motor unit?
Site of gas exchange in the lungs
What are alveoli?
The function of the skeletal system
What is support/protection/leverage?
This vascular structure dictates the flow of blood to the capillaries
What are arterioles?
The outermost layer of connective tissue surrounding muscle
What is the epimysium?
The principle in which all muscle fibers in a motor unit contract and develop force at the same time
What is the all-or-none principle?
The function of the nasal cavity
What is warming/humidification/purification of air?
The skull is part of this division of the skeletal system
What is the axial skeleton?
Stimulation of this division of the autonomic nervous system will increase heart rate
What is the sympathetic nervous system?
The substance that regulates muscle actions
What is calcium?
Muscle fiber type that has the highest force production
What are Type IIx fibers?
The primary muscle involved in inspiration
What is the diaphragm?
The junction of bones
What is a joint?
This part of an ECG indicates atrial depolarization
What is the P-wave?
As actin slides over myosin, both the _____ and _____ shrink, and the Z-lines are pulled towards the center of the sarcomere
What are the H-zone and I-bands?
Specialized sensory receptors that provide the central nervous system with information needed to maintain muscle tone and perform complex coordinated movements
What are proprioceptors/mechanoreceptors?
The movement of molecules across membranes from areas of high concentration to areas of low concentration
What is diffusion?
A _______ joint allows for movements in all three axes of rotation
What is a multiaxial joint?
Iron-protein molecule that acts as an acid-base buffer by regulating hydrogen ion concentrations in the blood
What is hemoglobin?
During this phase of the Sliding Filament Theory, the sarcoplasmic reticulum is stimulated to release calcium, which allows cross-bridges to form
What is Excitation-Contraction Coupling?
This is the result of a high frequency of muscle twitch summations
What is tetanus?
The lungs experience negative pressure during this part of ventilation
What is inspiration?