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Melissa Damerow
Week 14 Study Cards
| Question | Answer |
|---|---|
| Which is true of a neuron with a resting potential? | The sodium pump has moved Na+ to the outside of the plasma membrane. |
| A synaptic knob would be located on a(n): | axon. |
| Serotonin is an example of a(n): | amine neurotransmitter. |
| Within the nervous system, coding for the strength of a stimulus is accomplished through: | the frequency of nerve impulses. |
| When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called: | saltatory conduction. |
| Severe depression can be caused by a deficit in certain brain synapses of: | amines. |
| The fastest nerve fibers in the body can conduct impulses up to approximately _____ meters per second. | 130 |
| The active transport mechanism in the plasma membrane that transports sodium and potassium ions in opposite directions and at different rates is the | sodium-potassium pump. |
| Cerebrospinal fluid is formed by filtration of blood in the: | choroid plexuses. |
| The preganglionic neurons of both the sympathetic and the parasympathetic divisions are cholinergic: True or False | True |
| Which of the following is a description of the principle of autonomic antagonism as it relates to the autonomic nervous system? | If sympathetic impulses tend to stimulate an effector, parasympathetic impulses tend to inhibit it. |
| Once inside the sympathetic chain ganglion, the preganglionic fiber may: | synapse with a sympathetic postganglionic neuron. send ascending and/or descending branches through the sympathetic trunk to synapse with postganglionic neurons in other chain ganglia. pass through one or more ganglia without synapsing. |
| Parasympathetic stimulation has no effect on any of the following areas except: | sweat glands. |
| A child was frightened by a large dog. The pupils of the child’s eyes became dilated, and the heart and respiratory rates increased. These symptoms were caused by stimulation of: | the sympathetic nervous system. |
| Accommodation for near vision necessitates | an increase in the curvature of the lens. constriction of the pupils. convergence of the two eyes. |
| The last step in the nonsteroid hormone mechanism of action is: | protein kinases activate other enzymes. |
| The receptors responsible for sensing crude and persistent touch are the: | Ruffini corpuscles. |
| The immediate effect of a steroid hormone on a cell is the: | transcription of RNA. |
| Which of the following is true about pain receptors? | Alpha fibers are associated with sharp, localized pain. |
| During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? | It flows into the inferior vena cava. |
| A hematocrit of 56% would be an indication of: | polycythemia. |
| The localized pressure gradient needed to maintain blood flow in a tissue is called | perfusion pressure. |
| The difference between systolic pressure and diastolic pressure is called | pulse pressure. |
| Platelets play an important role in | blood clotting. |
| _______ is the only antibody class with the ability to cross the placental barrier, providing passive immunity to the developing fetus during pregnancy. | IgG. |
| Which antibody is synthesized by immature B cells and then inserted into their plasma membranes? | immunoglobulin M |
| Recognition of antigens by antibodies occurs when an | antigen’s epitopes fit into and bind to an antigen molecule’s antigen-binding site. |
| The lymph pressure gradient is established by | breathing movements and skeletal muscle contractions. |
| Which of the following combinations in arterial blood could cause an increase in the respiratory rate? | Increased PCO2, decreased arterial pressure, decreased pH, decreased PO2 |
| The vital capacity is equal to the sum of the: | inspiratory reserve volume, tidal volume, and expiratory reserve volume. |
| Boyle’s law states that the volume of a gas varies _____ with pressure at a _____ temperature. | inversely; constant |
| 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. |
| Dalton law states that the partial pressure of a gas in a mixture of gases is _____ to the total pressure of the mixture. | directly related to the concentration of that gas in the mixture and |
| Ciliated cells lining the respiratory tract: | help move the mucus blanket toward the pharynx. |
| Which of the following is not a means of transporting oxygen in the blood? | Combined with the bicarbonate ion (HCO3–) |
| An end product of fat digestion is: | glycerol. |
| The final product of carbohydrate digestion is a: | monosaccharide. |
| Which of the processes of mechanical digestion involves the esophagus? | Deglutition Peristalsis |
| Which phase(s) of gastric secretion is(are) stimulated by the sight, taste, and smell of food? | Cephalic phase |
| Glucose moves from the GI tract into the circulatory system by the process of: | cotransport. |
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melissad2504
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