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Kyla Hartley 2

Psysiology stack

In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. A-True B-False A- True
The action potential seems to “leap” from node to node along a myelinated fiber. This type of impulse regeneration is called __________ conduction. a-sensory b-refractory c-action potential d-saltatory D
Whether an impulse is continued through the neuron depends on the magnitude of the voltage in the axon hillock. a-True b-false A-true
A synapse consists of: a-a synaptic knob. b-a synaptic cleft. c-the plasma membrane of a postsynaptic neuron. d-all of the above. C
The shoulder joint is a a-multiaxial b-free moveable c-ball and socket d-the shoulder joint is all of these D
According to sliding filament theory a-actin moves past myosin b-tropomyosin moves past actin c-troponin moves past myosin A
The impact of effector activity on sensors may be positive or negative. Homeostatic control mechanisms are categorized as a-neutral feedback systems b-organs directly influenced by physiological variables or mechanisms c-active or passive feedback syst B
If the secretion of oxytocin during childbirth operated as a negative feedback control loop, what effect would it have on uterine contractions? a-stimulate stronger contractions b-inhibit contractions c-no change d-initially be weak then gain strength B
A saturated fatty acid is a-all available bonds of polypeptide chain are filled b-all bonds of hydrocarbon chain are filled c-one or more bonds in hydrocarbon chain are saturated with hydrogen atoms d-one or more bonds in polypeptide chain are saturat B
Which lipid is part of vitamin D? a-Glycerol b-steroid c-prostaglandins d-fatty acids B
RNA makes proteins by a-transcription b-translation c-replication d-duplication B
Osmosis is a-net movement of water from higher to lower concentration b-excretory process c-cells engulf particles d-net movement from lower solute concentration to higher solute concentration D
Created by: kylah0428
 

 



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