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Joy Fulton

Physiology Week 7-13

QuestionAnswer
When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called: saltatory conduction.
A synapse consists of: a synaptic knob. a synaptic cleft. the plasma membrane of a postsynaptic neuron. *All*
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
Blood vessels in both digestive organs and skeletal muscles are dilated by sympathetic stimulation. True
How does a dually innervated autonomic effector differ from a singly innervated autonomic effector? A dually innervated effector receives input from both sympathetic and parasympathetic pathways. A singly innervated autonomic effector receives input from only the sympathetic division.
The vomiting reflex is mediated by the: Medulla
The two-point discrimination test can be used to measure: the sensitivity of the skin in various parts of the body.
Which of the following is a function of glucagon? Tends to increase blood glucose concentrations
Clearness or sharpness of visual perception is known as: visual acuity
All of the following are true statements except: aspirin produces some of its effects by increasing PGE synthesis.
The chemoreceptors in the carotid bodies are particularly sensitive to: hypercapnia
A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is erythropoietin
Platelets play an important role in blood clotting
Which protein interferes with the ability of viruses to cause disease? interferon
The ingestion and destruction of microorganisms or other small particles is called phagocytosis
Which antibody is synthesized by immature B cells and then inserted into their plasma membranes? immunoglobulin M
External respiration can be defined as: -the exchange of gases between the lung and the blood capillaries in the lung. & -pulmonary ventilation.
By the time the blood leaves the lung capillaries to return to the heart, what percentage of the blood’s hemoglobin has united with oxygen? 97%
Ciliated cells lining the respiratory tract: help move the mucus blanket toward the pharynx.
Internal respiration can be defined as: the exchange of gases between the blood capillaries and the tissue cells.
Which blood vessel carries absorbed food from the GI tract to the liver? Portal vein
Which phase(s) of gastric secretion is(are) stimulated by the sight, taste, and smell of food? Cephalic phase
Which of the following is not true of enzymes? They change chemically and are in the end products of the reaction
Created by: Ojoy29
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