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assignment 2 physio

physiology weeks 7-13

question/termanswer/definition
Visceroceptors are located in which of the following? A. skin B. Tendons C. Internal organs D. Skeletal muscles C. Internal organs
The receptors responsible for sensing crude and persistent touch are the: A. Meissner corpuscles B. Krause end bulbs C. Ruffini corpuscles D. free nerve endings C. Ruffini corpuscles
The physiological mechanism that dissolves clots is known as A. hemostasis B. fibrinolysis C. erythroblastosis D. diapedesis B. fibrinolysis
Inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of A. vasoconstriction B. vasodilation C. vasopressure D. vasomotor control B. vasodilation
Starlings law of the heart states that, within limits, the longer, or more stretched, the heart fibers are at the beginning of the contraction, the A. weaker the contraction B. slower the heart rate C. faster the heart rate D. stronger the contraction D. stronger the contraction
___, a natural constituent of blood, acts as antithrombin and prevents clots from forming in vessels. A. spectrin B. erythropoietin C. serum D. heparin D. heparin
Whether an impulse is continued through the neuron depends on the magnitude of the voltage in the axon hillcock. True or False? True
In a myelinated neuron, the impulse can travel under the myelin between the nodes of Ranvier. True or False. True
Somatic motor and autonomic pathways share all of the following characteristics except: _direction of information flow. _ location of peripheral fibers. _number of neurons between central nervous (CNS) and effector _acetylcholine Number of neurons between central nervous system (CNS) and effector.
The vomiting reflex is mediated by the: A. cerebrum B. medulla C. thalamus D. cerebellum B. medulla
Movement of hair cells in the organ of Corti agains the ____ membrane can stimulate nerve impulse condition. A. tectorial B. basilar C. vestibular D. cochlear A. tectorial
One of the few hormones that functions on a positive-feedback loop is: A. ADH. B. calcitonin. C. oxytocin. D. insulin C. oxytocin
Which of the following is a function of glucagon? A. promotes the entry of glucose into tissue cells B. Tends to decrease blood glucose concentrations C. Tends to increase blood glucose concentrations D. Converts glucose into glycogen C. Tends to increase blood glucose concentrations
The heart begins beating in the fetus at about what stage of development? A. Fourth month B. Second month C. After about 4 weeks D. After about 2 weeks C. after about 4 weeks
Cardiac output is determined by A. stroke volume and blood pressure B. heart rate and blood pressure C. stroke volume and heart rate D. stroke volume and peripheral resistance. C. stroke volume and heart rate
Factors that affect the strength of myocardial contraction are called A. inotropic factors B. chronotropic factors C ejection factors D. cardiac afterload factors A. inotropic factors
Which organ has several functions, including defense, hematopoiesis, red blood cell and platelet destruction, and blood reservoir? A. thymus B. thyroid C. spleen D. thalamus C. spleen
The movement of phagocytes from blood vessels to an inflammation site is called A. phagocytosis B. pavementing C. diapedesis D. apedesis C. diapedesis
During their residence in the thymus, pre-T cells develop into __, cells that proliferate as rapidly as any in the body. A. cytotoxic T cells B. antigen-presenting cells C. thymocytes D. memory T cells C. thymocytes
Pyrogen molecules trigger the fever response by promoting the production of A. leukotrienes B prostaglandins C. antibodies D. cytokines B. prostaglandins
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 A. leukocyte B. macrophage C. lymphocyte D. phagocyte C. lymphocyte
The internal environment of the human body is protected by the ___, which is(are) referred to as the first line of defense A. skin B. connective tissue C. white blood cells D. muscle tissue A. skin
The primary organ of the lymphatic system is the: A. thalamus B. thyroid C. thymus D. spleen C. thymus
Lymphocytes that kill many types of tumor cells and cells infected by different kinds of viruses are known as A. phagocytes B. leukocytes C. natural killer cells D. macrophages C. natural killer cells
Which of the following would have the greatest accelerating effect on the dissociation of oxygen from hemoglobin? A. increased PO2 B. decreased PCO2 C. decreased PO2 and decreased PCO2 D decreased PO2 and increased PCO2 D. decreased PO2 and increased PCO2
During inspiration, the expansion of the lungs causes A. cohesion of visceral and parietal pleura B. a pressure gradient from alveoli to atmosphere C. a decrease in alveolar pressure D. an increase in intrathoracic pressure from about -6 to -4 mm Hg. C. a decrease in alveolar pressure
Which of the following is not a means of transporting oxygen in the blood? A. as oxyhemoglobin B. combined with bicarbonate ion (HCO3-) C. dissolved in the plasma D. All of the above are used to transport oxygen in the blood. B. combined with the bicarbonate ion (HCO3-)
By the time the blood leaves the lung capillaries to return to the heart, what percentage of the blood's hemoglobin has united with oxygen? A. 55% B. 63% C. 82% D. 97% D. 97%
The approximate partial pressure of oxygen at standard atmosphere pressure is about __mm Hg. A. 23 B. 160 C. 300 D. 590 B. 160
Which of the following constitutes total lung volume? A. residual volume and vital capacity B. tidal volume, inspiratory reserve volume, and expiratory reserve volume C. residual volume and tidal volume D. vital capacity and tidal volume A. residual volume and vital capacity
A drop in the body's production of carbonic anhydrase would hinder the formation of: A. carbonic acid B. oxyhemoglobin C. carbaminohemoglobin D. All of the above are correct A. carbonic acid
Which of the following is not true of enzymes? A. They accelerate chemical reactions B. They change chemically and are in the end products of the reaction. C. They are vital to chemical reactions D. Many contain vitamins in their structure B. They change chemically and are in the end products of the reaction
The hormone that inhibits gastric muscle, slowing passage of food into the duodenum, is called: A. gastric inhibitory peptide B. enterogastrone C. chyme D. cholecystokinin A. gastric inhibitory peptide
Which of these in 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
Rotavirus can cause what life-threatening condition in infants? A. constipation B. diarrhea C. cholera D. pyloric stenosis B. diarrhea
Which phase(s) of gastric secretion is(are) stimulated by the sight, taste, and smell of food? A. intestinal phase B. cephalic phase C. gastric phase D. all of the above B. cephalic phase
Created by: lmiranda2
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