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Kristina Limburg
Physiology Week 7-13
| In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier. - True or False | TRUE |
| A synapse can occur only between an axon and: | A dendrite, a cell body, another axon |
| Which neuron could transmit a nerve impulse the fastest? | A large-diameter neuron with myelin |
| Severe depression can be caused by a deficit in certain brain synapses of: | amines |
| A reflex consists of either a muscle contraction or a | glandular secretion |
| The somatic motor system includes all the _____ motor pathways _____ the CNS. | voluntary; outside |
| Which of the following is not an example of sympathetic stimulation? | Constriction of the bronchioles |
| The cerebellum acts with the _____ to produce skilled movement. | cerebrum |
| What should you avoid doing in the middle of your sleep cycle that would lower melatonin? | turning on the lights |
| If movement of a visual stimulus is leftward in one eye and rightward in the opposite eye, the brain interprets this as movement toward (or away) from the face along the midline. Which eye is visualizing leftward stimulus? | right eye |
| 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 |
| Movement of hair cells in the organ of Corti against the _____ membrane can stimulate nerve impulse condition. | tectorial |
| Neutrophils are highly mobile and phagocytic. They migrate out of blood vessels and into tissue spaces. This process is called | diapedesis |
| Which division of the autonomic nervous system sends fibers to the heart? | sympathetic & parasympathetic |
| _____ is used to determine the volume percentage of red blood cells in whole blood. | Hematocrit |
| The chemoreceptors in the carotid bodies are particularly sensitive to: | hypercapnia |
| The lymph pressure gradient is established by: | breathing movements & skeletal muscle contractions |
| The _____ postulates that when an antigen enters the body, it selects the clone whose cells are committed to synthesizing its specific antibody and stimulates these cells to proliferate and to thereby produce more antibodies. | clonal selection theory |
| 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 |
| The volume of air exhaled normally after a typical inspiration is called _____ volume. | tidal |
| More than two-thirds of the carbon dioxide carried by blood is carried in the form of | bicarbonate ions |
| 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 |
| During inspiration, the expansion of the lungs causes: | a decrease in alveolar pressure |
| Peristalsis is regulated in part by the intrinsic stretch reflexes. It is also thought to be stimulated by the hormone | cholecystokinin (CCK) |
| Chemical digestion requires the secretion of _____ into the lumen of the GI tract. | digestive enzymes and bile |
| Which of the following is not one of the openings that must be blocked when food moves from the pharynx into the esophagus? | Oropharynx |
| The sodium cotransport or coupled transport acts to transport sodium ions and glucose molecules _____ the GI lumen. | passively out of |
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klimburg1
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