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Kimona Simpson

Human Physiology #2

QuestionAnswer
The first event to occur when an adequate stimulus is applied to a neuron is? some of the sodium channels at the point of stimulation open.
Neurotransmitters are released in a synapse and bind to? receptors on the postsynaptic neuron.
When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called? saltatory conduction.
Dopamine, epinephrine, and norepinephrine are classified as? catecholamines.
Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)? Phenelzine
The preganglionic neurons of both the sympathetic and the parasympathetic divisions are cholinergic. True
The knee jerk can be classified as a segmental reflex because? impulses that mediate it enter and leave the same segment of the cord.
The cerebellum acts with the _____ to produce skilled movement. cerebrum
Which of the following is a correct statement? There are 5 lumbar nerve pairs.
Which is the only plexus that contains fibers from the thoracic region of the spinal cord? Brachial
Which of the following is not an example of sympathetic stimulation? Constriction of the bronchioles
The sequence of auditory ossicles in the middle ear starting at the tympanic membrane and ending at the oval window is: malleus, incus, and stapes.
Clearness or sharpness of visual perception is known as: visual acuity
Which of the following statements is not true of the pineal gland? All of the above are true of the pineal gland.
When a small amount of one hormone allows a second hormone to have its full effect, the phenomenon is called: permissiveness.
Sensory impulses ending in what part of the CNS trigger imprecise or “crude” sensation awareness? Thalamus
The localized pressure gradient needed to maintain blood flow in a tissue is called perfusion pressure.
A hematocrit of 56% would be an indication of: polycythemia.
Blood volume per kilogram of body weight varies inversely with: body fat.
Factors that affect the strength of myocardial contraction are called inotropic factors.
Blood viscosity stems mainly from the red blood cells but also partly from the _____ in blood. protein molecules present
What is the function of the spleen? all of the above
_____ refers to a phenomenon in which the genetic characteristics common to a particular kind of organism provide defense against certain pathogens. Species resistance
Lymphatics in the villi of the small intestines are called lacteals
Adaptive immunity, part of the body’s third line of defense, is orchestrated by two different classes of a type of white blood cell called the lymphocyte.
About 98.5% of the oxygen carried by systemic arterial blood is attached to: hemoglobin
Which type of breathing is characterized by repeated sequences of deep gasps and apnea, and is usually seen in people with increased intracranial pressure? Biot’s breathing
Standard atmospheric pressure is _____ mm Hg 760
Which of the following constitutes total lung volume? Residual volume and vital capacity
Vital capacity is defined as the maximum volume of air that can be moved into and out of the lungs during forced respiration.
Which phase(s) of gastric secretion is(are) stimulated by the sight, taste, and smell of food? Cephalic phase
Polysaccharides are hydrolyzed into disaccharides by enzymes known as: amylase
Rotavirus can cause what life-threatening condition in infants? Diarrhea
Which of the following is a disaccharide? Sucrose
Bicarbonates are useful in the GI tract to: neutralize hydrochloric acid.
The hormone that inhibits gastric muscle, slowing passage of food into the duodenum, is called: gastric inhibitory peptide.
The major site for the absorption of the end products of digestion is the: small intestine.
Created by: kimona
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