Homeostasis Practice Test

Transcription

1 Name: ate: 1. Which statement explains the importance of maintaining a constant internal environment to ensure proper enzyme functioning? A. hanges in ph and temperature will cause the enzyme reaction rate to be too fast.. Temperature and ph determine amino acid sequences in enzymes.. hanges in ph will change the genetic instructions of enzymes.. Increasing the temperature and ph can alter the specific shape of enzymes. 2. reathing rate is constantly being monitored and adjusted in the human body, which results in A. the differentiation of mature body. feedback mechanisms removing damaged. modification of gene activity in. the internal environment being kept within certain limits 3. The diagram below represents an activity that occurs in the human body. 4. ase your answers to the following question(s) on the information and data table below and on your knowledge of biology. Five students design an experiment to answer the question: How is heart rate affected by running? Two chairs were set up at different ends of a large room. The pulse rate of each student was taken at rest just before running. Each of the five students ran between the chairs a different number of times. Their pulse rates were taken after running and the results are shown in the table below. Student Effect of Running on the Heart Number of Times the Student Ran etween the hairs Pulse Rate After Running (beats/min) A E Explain how the change in heart rate helps to maintain homeostasis during exercise. 5. The disease known as malaria may result in a fever, a decrease in red blood, and an enlarged liver and spleen. These symptoms are evidence of A. a disruption of homeostasis. a decrease in allergic reactions. an increased number of cell organelles. hormone destruction This diagram best illustrates A. active transport. maintenance of homeostasis. synthesis of nutrients. differentiation page 1

2 6. ase your answer to the following question(s) on the information below and on your knowledge of biology. 9. The accompanying diagram represents the actions of two hormones in the human body. An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin. Muscle fatigue occurs during this activity when A. carbon dioxide is used up in the muscle. simple sugar is converted to starch in the muscle. proteins accumulate in mitochondria in the muscle. certain waste products collect in the muscle 7. The graph below shows the levels of glucose and insulin in the blood of a human over a period of time. This diagram best illustrates A. recombination. feedback. insertion. deletion 10. The most immediate response to a high level of blood sugar in a human is an increase in the A. muscle activity in the arms. blood flow to the digestive tract. activity of all cell organelles. release of insulin This graph represents A. an allergic reaction. an antigen-antibody reaction. maintenance of homeostasis. autotrophic nutrition 8. Which phrase does not describe a way the human body responds to fight disease? A. destruction of infectious agents by white blood 11. What will most likely happen to wastes containing nitrogen produced as a result of the breakdown of amino acids within liver of a mammal? A. They will be digested by enzymes in the stomach.. They will be removed by the excretory system.. They will be destroyed by specialized blood.. They will be absorbed by mitochondria in nearby.. production of antibodies by white blood. increased production of white blood. production of pathogens by white blood page 2

3 12. Which situation indicates that a disruption of homeostasis has taken place? A. the presence of hormones that keep the blood sugar level steady. the maintenance of a constant body temperature. cell division that is involved in normal growth. a rapid rise in the number of red blood organs in multicellular organisms 13. Which order of metabolic processes converts nutrients consumed by an organism into cell parts? A. digestion absorption circulation diffusion synthesis. absorption circulation digestion diffusion synthesis. digestion synthesis diffusion circulation absorption. synthesis absorption digestion diffusion circulation 14. What is the role of sensory organs in the body? A. the transmission of impulses directly to effectors. the detection of environmental stimuli. the conduction of impulses from the spinal cord 15. Which is an example of an effector? A. a taste bud of the tongue. the auditory nerve of the ear. the retina of the eye. a muscle of the arm 16. Select the process, chosen from the list below, that is best described by the statement shown. Results in muscle fatigue and cramping in humans A. photosynthesis. alcoholic fermentation. aerobic respiration. lactic acid fermentation 17. Nerve impulses are carried from the spinal cord to the muscles of the arm by A. sensory neurons. tendons. motor neurons. ganglia 18. The skeleton of the human embryo is made up primarily of A. bone. muscle. cartilage. epithelium. the interpretation of impulses from motor neurons page 3

4 Achoo! Most sneezing bouts are caused by nasal irritation. Viruses, bacteria, and inhaled irritants such as pepper, dust, and pollen are common causes. In some people, looking at a bright light can cause sneezing; this is known as the photic response. Sneezing usually begins when receptors in the interior of the nose are stimulated. A message is carried by a nerve to a reaction of the midbrain which in turn, stimulates blood vessels to dilate and mucous glands to increase their activity. Other impulses go to the respiratory center in the medulla, causing it to stimulate inhalation. As soon as inhalation is complete, muscles encircling the top of the airway of the victim temporarily constrict. The nose and mouth are momentarily sealed off from the rest of the respiratory passages. Then the process of exhalation begins. As the diaphragm and abdominal muscles contract, pressure builds until the seal is forced open and air explodes out in a sneeze. A sneeze that originates with an irritation of the nose can be explained by this process, but in the case of a sneeze caused by a bright light, unidentified portions of the brain seem to be involved in producing the photic response. This response appears to be inherited and is present in approximately 20% of the population. page 4

5 19. Irritation of the nasal passages first results in A. a forceful exhalation of air through the mouth. rapid inhalation and exhalation. irregular contraction and relaxation of the diaphragm. dilation of blood vessels and increased production of mucus 20. The impulses involved in sneezing would most likely follow which pathway A. motor neuron interneuron sensory neuron. motor neuron sensory neuron interneuron. sensory neuron interneuron motor neuron. sensory neuron motor neuron interneuron 21. Which part of the human central nervous system is correctly paired with its function? A. spinal cord - coordinates learning activities. cerebellum - serves as the center for reflex actions. cerebrum - serves as the center for memory and reasoning 23. The removal of a human gallbladder interferes most directly with the A. production of gastric juices. production of saliva. storage of pancreatic juices. storage of bile 24. Into which parts of the human digestive system are digestive enzymes secreted? A. mouth, esophagus, stomach. stomach, small intestine, large intestine. mouth, stomach, small intestine. esophagus, stomach, large intestine 25. In humans, the large intestine is the major site for the A. completion of lipid digestion. absorption of water into the bloodstream. completion of carbohydrate digestion. storage of nutrients for future use 26. In the human digestive system, most nutrients are absorbed into the blood through the lining of the. medulla - maintains muscular coordination A. esophagus. small intestine 22. Which two structures are directly involved in locomotion in humans? A. visceral muscle and fibrous tendons. smooth muscle and ligaments. skeletal muscle and bones. cardiac muscle and immovable joints. stomach. large intestine 27. In a human, peristalsis occurs in which organs? A. salivary gland, esophagus, and stomach. stomach, small intestine, and pancreas. esophagus, stomach, and small intestine. esophagus, small intestine, and liver page 5

6 28. Which part of human blood is primarily responsible for transporting nutrients, hormones, and wastes? A. red blood cell. plasma. white blood cell. platelet 29. In humans, a function of intercellular fluid is to A. produce red blood. serve as a transport medium. produce white blood. serve as a filter for uric acid 30. In humans, red bone marrow provides A. structural support for the body. a source of new blood. an attachment site for muscle tissue. a site to trap bacteria 31. Filtering dust particles out of the human respiratory tract is a function of the 33. The breathing rate of a human is regulated by the A. concentration of nitrogen in the lungs. pressure of the air in the trachea. concentration of carbon dioxide in the blood. pressure of the blood in the capillaries 34. Which is a characteristic of lymph nodes? A. They carry blood under great pressure.. They move fluids by means of a muscular pump.. They produce new red blood.. They contain phagocytic. 35. An example of a human response is A. a stone approaching the eye. the buzz of a bee. the fragrance of a rose. the secretion of a hormone A. cilia. bronchioles. epiglottis. alveoli 32. In humans, the exchange of respiratory gases occurs within the A. nose. trachea. bronchial tubes. alveoli page 6

7 Problem-Attic format version c EducAide Software Licensed for use by Adrienne rouch Terms of Use at 05/09/ The heart rate increases, which transports more oxygen from the lungs to the muscle. The heart beats faster and transports carbon dioxide to the lungs faster for elimination. Increased heart rate removes wastes from more rapidly. A A A 17.