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Physiology

Weeks 7-13

QuestionAnswer
Neurotransmitters are released in a synapse and bind to: receptors on the postsynaptic neuron.
The fastest nerve fibers in the body can conduct an impulse that is how much faster than the slowest fibers in the body? almost 300 times faster
Dopamine, epinephrine, and norepinephrine are classified as: catecholamines.
Nerves that innervate the floor of the pelvic cavity and some of the surrounding areas are found in the _____ plexus. coccygeal
What is the difference between a somatic reflex and an autonomic reflex? A somatic reflex is caused by contraction of skeletal muscles, whereas an autonomic reflex consists of contraction of smooth or cardiac muscle or secretions of glands.
Dynamic equilibrium depends on the functioning of the crista ampullaris.
The receptors responsible for sensing crude and persistent touch are the: Ruffini corpuscles.
What is the functional significance of large areas of cardiac muscle being electrically coupled to form a single functional syncytium? Because they form a syncytium, muscle cells can pass an action potential along a large area of the heart wall, stimulating contraction in each muscle fiber of the syncytium.
During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? It flows into the inferior vena cava.
Complement can best be described as a(n): enzyme in blood
Which of the following is a powerful poison that acts directly on any cell and quickly kills it? lymphotoxin
Memory cells: become plasma cells when exposed to an antigen.
The tendency of the thorax and lungs to return to the preinspiration volume is called: elastic recoil.
The function of the vibrissae in the vestibule is to: provide an initial “filter” to screen particulate matter from air that is entering the system.
When classified according to the kind of chemical reactions catalyzed, digestive enzymes are referred to as _____ enzymes. hydrolyzing
Which of the following is not true of enzymes? They change chemically and are in the end products of the reaction.
Created by: vfinlay14
 

 



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