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Human Physiology 2

Study Stack 2

QuestionAnswer
The difference between sodium and potassium in the generation of action potential is that: Sodium causes depolarization of the cell membrane, and potassium causes repolarization of the cell membrane
An ion channel that opens in response to a sensory stimulus is a(n) Stimulus- gated channel
A neurologist is using a voltmeter to measure potential. The membrane potential of a neuron was recorded at +30 mV. This is what type of membrane potential? Action
A membrane that exhibits a membrane potential is said to be polarized
Excitatory neurotransmitters are most likely to initiate an action potential
The fastest nerve fibers in the body can conduct impulses up to approximately_____meters per second 130
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
Which of the following is not one of the main chemical classes of neurotransmitters? Triglycerides
Which of the following is not true of the knee jerk reflex? It is a flexor reflex
Acetylcholine can stimulate ____receptors Nicotinic
How does a dually innervated autonomic effector differ from a singly innervated autonomic effector? A dually innervated effector receives input from sympathetic and parasympathetic pathways. A singly innervated autonomic effector receives input from only the sympathetic division.
A mixed nerve is one that: carries both sensory and motor fibers.
All of the following are nonsteroid hormones except: cortisol
Which of the following is a function of glucagon? Tend to increase blood glucose concentrations
Dynamic equilibrium depends on the functioning of the crista ampullaris
The clear and potassium-rich fluid that fills the labyrinth is endolymph
A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is erythropoietin
The physiological mechanism that dissolves clots is known as fibrinolysis
Platelets play an important role in blood clotting
After blood leaves the lungs and returns to the heart, it enters the left atrium
Pyrogen molecules trigger the fever response by promoting the production of prostaglandins
The functions of the lymph nodes are defense and hematopoiesis
Which protein interferes with the ability of viruses to cause disease? interferon
Oxygen enters blood from alveolar air because the partial pressure of alveolar air is greater than the partial pressure of incoming blood.
The ability of the lungs and thorax to stretch is referred to as compliance
The volume of air exhaled normally after a typical inspiration is called____ volume. tidal
During the respiratory cycle, intrapleural pressure is always less than alveolar pressure. This difference is called transpulmonary pressure.
Which of the following is not a means of transporting oxygen in the blood? Combined with the bicarbonate ion (HCO3)
Which gas law deals with the solubility of gases in solution? Henry
Standard atmospheric pressure is ____mm Hg. 760
Internal respiration can be defined as: the exchange of gases between the blood capillaries and the tissue cells.
Boyle's law states that the volume of a gas varies ____ with pressure at a _____temperature inversely; constant
Because fats are insoluble in water, they must be emulsified
Fats and other nutrients in the duodenum stimulate the intestinal mucosa to release a hormone called gastric inhibitory peptide.
Chemical digestion requires the secretion of ____ into the lumen of the GI tract. digestive enzymes and bile.
The ejection of bile from the gallbladder in controlled by which hormones? CCK and secretin
Created by: MsVernell74
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