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Physiology

Set 2

QuestionAnswer
The magnitude of the action potential peaks when the sodium channels close. True OR False True
Which membrane receptor acts to directly change ion permeability when stimulated? a Metabotropic receptor b G-protein-coupled receptors c Gated-channel receptor d Ionotropic receptor C Gated-channel receptor
In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. True OR False True
Severe depression can be caused by a deficit in certain brain synapses of: a acetylcholine. b amines. c amino acids. d neuropeptides d neuropeptides
Which of the following statements about amino acid neurotransmitters is incorrect? a They are among the most common neurotransmitters in the central nervous system (CNS). b They are all inhibitory neurotransmitters. c Glycine is a widely distributed b They are all inhibitory neurotransmitters.
Stimulus-gated channels open in response to: a sensory stimuli. b the influx of potassium. c hyperpolarization. d both A and B a sensory stimuli.
No impulse can be sent through a neuron: a during the relative refractory period. b when the charge of the neuron is –70. c during the absolute refractory period. d when the stimulus is too strong. c during the absolute refractory period.
The cortex is capable of storing and retrieving information from both short-term and long-term a consciousness. b memory. c consolidation. d pathways. b memory.
Which is not true of the hormone somatostatin? a It is produced by the delta cells of the pancreas. b It inhibits the secretion of glucagon. c It stimulates the secretion of insulin. d Both B and C are not true of the hormone somatostatin. c It stimulates the secretion of insulin.
Movement of hair cells in the organ of Corti against the _____ membrane can stimulate nerve impulse condition. a tectorial b basilar c vestibular d cochlear a tectorial
Which of the following is not true of ventricles? a They are the pumping chambers of the heart. b The myocardium of the ventricles is thicker than that of the atria. c The myocardium of the left ventricle is thicker than that of the right ventricle. d d All of the above are true of the ventricles
The T cell is considered a the messenger b the transmitter c the communicator d the receiver c the communicator
Spirometry is used to measure all of the following EXCEPT: a Expiratory Reserve Volume b Tidal volume c Inspiratory capacity d Total lung capacity d Total lung capacity
One hundred milliliters of arterial blood contains approximately what volume percent of oxygen? a 10% b 15% c 20% d 25% c 20%
Excessive fluid in the pleural cavity would be most likely to cause: a increased residual volume. b decreased vital capacity. c increased functional reserve volume. d decreased tidal volume b decreased vital capacity.
What percentage of this blood flow comes from the hepatic portal system? a 20% b 50% c 80% d 95% c 80%
The act of expelling feces is called a elimination. b excretion. c defecation. d rehydration. c defecation.
The hormone that stimulates the release of bicarbonate substance from the pancreas is: a enterogastrone. b secretin. c gastrin. d cholecystokinin-pancreozymin b secretin.
Hydrolysis refers to: a breaking down a molecule of water to hydrogen and oxygen gas. b using water to split larger compounds into smaller ones. c using water to build larger compounds from smaller ones. d none of the above b using water to split larger compounds into smaller ones.
Which of these is not an example of mechanical digestion? a Moistening the food b Changing food from large to small particles c Propelling food through the digestive tract d All of the above are examples of mechanical digestion. a Moistening the food
Created by: jr090697
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