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A & P 01 A

CanColl May12 MCQ AP1 A

QuestionAnswer
homeostasis condition in which body's internal environment remains within certain physiological limit i.e. equilibrium
stress any stimulus that creates an imbalance in the internal environment
biology the study of living organisms
histology the study of the structure of cells and tissues
immunology the study of the body's defense mechanisms
physiology the study of the function of body parts
anatomy the study of the structures and relationships between the structures of the body
ion an atom that has gained or lost an electron
stem cells cells that have the ability to maintain a constant population of newly differentiating cells
pinocytosis cell drinking
phagosytosis cell eating
codon in the mRNA molecules, each set of three consecutive nucleotide bases
anti-codon one end of the tRNA carries a specific amino acid and the other has three nucleotides
diffusion spreading - natural tendency of small particles to spread out evenly within any space
osmosis net diffusion of water thru a selectively permeable membrane
unipolar neuron only one process from the cell body
bipolar neuron one dendrite and one axon
multipolar neuron multiple dendrites - and one axon
exocytosis secretory vesicles form inside the cell, which fuse with the cell wall and release their contents (waste substances) into the ECF
white matter aggregation of myelin
grey matter neuron cell bodies, dendrites and axon terminals that are unmyelinated
absolute refractory period period during which a second action potential cannot be initiated
relative refractory period period during which a second action potential can be initiated by only with a supra-threshold stimulus
direction of a nerve impulse dendrite to axon
Nerve fibers "A" large diameter, myelinated - energy efficient
Nerve Fibers "B" medium diameter, myelinated
Nerve Fibers "C" small diameter, unmyelinated - slowest
types of forces shear, compression and tensile
3 types of muscle skeletal (striated/vol) cardiac (striated/nonvol) smooth (non-striated/nonvol)
what is threshold for AP critical level (about -55 mV) for an action potential to arise in the trigger zone aka axon hillock
Tendon connects muscle to bone
ligament connects bone to bone
what is a motor unit a motor neuron and the skeletal mm fibres that it stimulates
whagt is the direction of signal in a motor unit CNS - to- PNS
node of ranvier nodes between myeline sheaths on axons
what is the purpose of an action potential it carries commands or sensory info to and from the brain.
where is calcium stored in the resting muscle sarcoplasmic reticulum
what neurotransmitter is released at the neuromuscular junction NMJ acetycholine ACh
what is the epithelial tissue layer of the epidermis made up of keratinized, stratified, squamous epthielium
what are melanocytes cells in the epidermis that produce melanin - produces colour in the skin
what are the two regions of the dermis superior layer is the papillary region and the deeper layer is called the reticular region
what makes up the lymphatic system lymph vessels, lymph nodes, thymus, and spleen
What is the function of the thymus located between the lungs - as part of the lymphatic system - it's primary purpose is to make T cells.
how many lymph nodes are in the body approx 600
what is the function of the lymph nodes filters lymph - and creates B cells
what is the function of the spleen located on the left side of the upper abdomen, the spleen produces T & B cells aka lymphocytes, macrophages and plasma cells
what is the purpose of the lymphatic system carries out immune responses, transports dietary lipids, drains excess interstitial fluid.
Created by: Hanz Onn
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