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Introductory Biology Exam I, Spring 2012 - George Mason University - Prof. Sameer Bhattara, Exams of Biology

George Mason University (GMU)Biology
Prof. Sameer Bhattarai

A biology exam from george mason university, spring 2012, for introductory biology 104-001. The exam consists of multiple-choice questions covering various topics such as animal characteristics, cell types, connective tissue, muscle, nervous system, digestion, and vitamins. Students are required to identify the correct answers based on their knowledge of biology.

Typology: Exams

2011/2012

Uploaded on 09/12/2012

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GEORGE MASON UNIVERSITY
Spring, 2012; Introductory Biology 104-001
Exam I
Total points 100
Your LAST Name_______________________
Your First Name ________________________
Your G Number _________________________
General Instructions: Please write your name (LAST NAME FIRST), on this question
paper and on your Scantron. Also write your name (LAST NAME FIRST) on the back of
your scantron. IF YOU DON’T FOLLOW THESE INSTUCTIONS 5 POINTS WILL BE
TAKEN OFF. This question paper will be returned to you.
Please read all possible answers before picking the best answer for each question. Don’t
forget to think! Mark each answer on your Scantron, as this is the only form which will be
corrected. You may mark this question paper, or not, as you wish. Answers on this question
paper will not be considered for correction purposes.
Feel free to ask questions if something is not clear to you. The Honor Code is in effect!
Best of luck to all.
1) Which of the following is/are characteristic of an animal?
a. prokaryotic
b. multicellular
c. lack cell walls
d. all of the above
e. b and c
2) You have been shrunken! You are now about 75 um (micrometers) tall, and you are
wandering through your little brother’s tissues (body tissues, not Kleenex). You
encounter some cells that occur in a single layer, are tightly bound together, and have
cilia on their free surface. These cells are most likely part of
a. simple epithelium
b. intercalated discs of cardiac muscle
c. loose connective (areolar) tissue
d. dense connective tissue (tendon)
e. none of the above
3) A stratified squamous epithelial cell:
a. covers surfaces
b. conducts nerve signals
c. contracts
d. connects things
e. none of the above
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Download Introductory Biology Exam I, Spring 2012 - George Mason University - Prof. Sameer Bhattara and more Exams Biology in PDF only on Docsity!

GEORGE MASON UNIVERSITY

Spring, 2012; Introductory Biology 104- Exam I Total points 100 Your LAST Name_______________________ Your First Name ________________________ Your G Number _________________________ General Instructions: Please write your name (LAST NAME FIRST), on this question paper and on your Scantron. Also write your name (LAST NAME FIRST) on the back of your scantron. IF YOU DON’T FOLLOW THESE INSTUCTIONS 5 POINTS WILL BE TAKEN OFF. This question paper will be returned to you. Please read all possible answers before picking the best answer for each question. Don’t forget to think! Mark each answer on your Scantron, as this is the only form which will be corrected. You may mark this question paper, or not, as you wish. Answers on this question paper will not be considered for correction purposes. Feel free to ask questions if something is not clear to you. The Honor Code is in effect! Best of luck to all.

  1. Which of the following is/are characteristic of an animal? a. prokaryotic b. multicellular c. lack cell walls d. all of the above e. b and c
  2. You have been shrunken! You are now about 75 um (micrometers) tall, and you are wandering through your little brother’s tissues (body tissues, not Kleenex). You encounter some cells that occur in a single layer, are tightly bound together, and have cilia on their free surface. These cells are most likely part of a. simple epithelium b. intercalated discs of cardiac muscle c. loose connective (areolar) tissue d. dense connective tissue (tendon) e. none of the above
  3. A stratified squamous epithelial cell: a. covers surfaces b. conducts nerve signals c. contracts d. connects things e. none of the above
  1. A non-living matrix, protein fibers, and living cells are the general characteristics of a. muscle b. loose connective tissue c. nervous tissue d. pseudostratified epithelial tissue e. simple squamous epithelium
  2. What kind of connective tissue has an extracellular liquid matrix called plasma? a. nerve tissue b. adipose tissue c. cartilage d. loose connective tissue e. blood
  3. Tendons, a fibrous tissue: a. help connect muscle and bone b. store fats c. help hold organs and tissues in place d. stores sugars e. none of the above
  4. Smooth muscle: a. helps move your arm b. helps move your leg c. helps your heart to beat d. helps move your stomach e. a and b
  5. Bone is a / an: a. epithelial tissue b. nervous tissue c. connective tissue d. cartilage tissue
  6. What is the structural and functional unit of nervous system? a. cell body b. neuron c. axon d. dendrite e. brain
  7. The definition of homeostasis is: a. the maintenance of a constant external environment b. the maintenance of a constant internal environment c. the fluctuations caused by temperature d. the fluctuations caused by salt balance
  1. Which of the following is most likely to be responsible if, when your blood sugar level rose, the level went back down? a. diabetes insipidus b. the use of sugar for energy by your cells c. a homeostatic mechanism based on negative feedback d. a homeostatic mechanism based on positive feedback e. type II diabetes
  2. When the body temperature is too high, which of the following does NOT occur? a. sweat glands are stimulated to produce sweat b. blood vessels in the skin contract c. evaporative cooling occurs d. heat radiates from the skin e. blood vessels at the body surface dilate
  3. Which of the following organisms has a gastrovascular cavity? a. cnidarians such as the hydra b. earthworms c. humans d. grasshoppers e. birds
  4. Which of the following is FALSE? a. animals that eat plants are called herbivores b. animals that eat meat are called carnivores c. animals that eat plants and animals are called omnivores d. animals that live in or on their food source and eat their way through it are called substrate feeders e. animals that extract food particles suspended in the surrounding water are called fluid feeders
  5. Digestion is the a. absorption of nutrients b. conversion of glucose into glycogen c. chemical and mechanical breakdown of food d. mixing of food in the stomach and intestine e. conversion of amino acids to proteins
  6. Do vertebrate animals have a complete or incomplete digestive system? a. Carnivores have a complete digestive system; herbivores an incomplete system b. They have a complete digestive system, because they have a mouth and an anus c. They have an incomplete system because they have a mouth and an anus d. Those vertebrates that lack teeth (birds, turtles, etc.) have an incomplete system; those with teeth (mammals, fish, etc.) have a complete system
  1. If you take a bite of a hamburger on a white bread bun, chew it for 25 seconds, then swallow, can any chemical digestion take place in those 25 seconds? a. no, digestion does not begin until food enters the small intestine b. no, digestion of protein does not begin until food enters the stomach c. yes, digestion of starch in the bun, by salivary amylase, can start in the mouth d. yes, salivary amylase starts digestion of the hamburger protein, collagen
  2. Smooth muscle propels food along the digestive tract by wavelike contractions called __. a. active transport b. regurgitation c. hydrolysis d. peristalsis e. diffusion
  3. Which of the following is/are true? a. during swallowing the epiglottis tips down covering the opening into the airway b. the pharynx is a common passageway for both air and food c. emulsification is the process of digestion in which the fat globules are broken down into fat droplets d. all of the above e. none of the above
  4. What organ is characterized by the presence of three layers of smooth muscle, sphincter muscles at each end, and chief and parietal cells? a. stomach b. large intestine c. trachea d. skin e. pharynx
  5. What is the accessory digestive organ that, among other things, produces bile? a. duodenum b. pancreas c. caecum d. kidney e. liver
  6. Which of the following enzymes is associated with the protein digestion? a. maltase b. sucrase c. pepsin d. bile e. lipase
  1. Complete the following reaction: “1” “2” Large chunks of fat -------------------> fat droplets -----------------> fatty acids and glycerol. a. 1 = bile; 2 = lipase b. 1 = lipase; 2 = HCl c. 1 = HCl; 2 = peptidase d. 1 = bile; 2 = amylase e. 1= trypsin; 2 = nuclease
  2. Villi and microvilli are important because they __________. a. increase the surface area for absorption of nutrients in the small intestine b. increase the surface area for absorption of nutrients in the stomach c. facilitate digestion by producing pancreatic juice d. facilitate digestion by producing gastric juice
  3. Feces are stored in the: a. small intestine b. urinary bladder c. gall bladder d. pancreas e. rectum
  4. Deficiency of vitamin B 1 (thiamine) can cause (Hint: this was the only vitamin you were asked to memorize!) a. Beriberi (nerve disorders, emaciation, anemia) b. Goiter (enlarged thyroid gland) c. Scurvy (degeneration of skin, teeth, blood vessels) d. Rickets (bone deformation) in children e. Skin lesions such as cracks at corners of mouth
  5. Why do animals need a respiratory system? a. animals are surrounded by air and need to equalize the pressure b. animals must oxidize the food they ingest in order to extract energy from it c. animals must keep their respiratory surfaces moist d. none of the above
  6. Which of the following features do all gas exchange systems have in common? a. the exchange surfaces are thin and moist b. they are enclosed within ribs c. they are exposed to air d. they are found only in mammals e. all of the above
  1. What is the role of diffusion in gas exchange? a. it is what initiates an inhalation b. it is responsible for the elasticity of lung tissue c. it is what produces CO 2 d. it is the means by which gasses move into or out of cells, including respiratory surfaces
  2. Do insects have a respiratory system? a. no, insects are not animals (they are insects!) b. yes, insects carry out gas exchange by means of fine gills c. yes, insects use their outer body surface area as a gas exchange surface d. yes, insects have a branching tracheal system, which carries air to the internal cells of the body
  3. Where is the breathing control center located? a. the lungs b. Washington, D. C. c. the brain d. the diaphragm e. the trachea and walls of the pharynx
  4. Countercurrent gas exchange in the gills of a fish a. speeds up the flow of water through the gills b. maintains a concentration gradient that enhances diffusion c. enables the fish to obtain oxygen without swimming d. means that the blood and water flow at different rates e. allows oxygen to diffuse against its partial-pressure gradient
  5. In order to control the rate and depth of breathing, which of the following stimuli does the breathing center directly sense and respond to? a. blood pH and CO 2 concentration b. blood pH and O 2 concentration. c. alveolar O 2 concentration d. none of the above
  6. The trachea in humans is supported by: a. bone rings b. cartilage rings c. epithelial rings d. the trachea does not need support
  1. The alveoli are where: a. oxygen is taken up by capillaries and carbon dioxide released b. carbon dioxide is taken up by capillaries and oxygen released c. oxygen is taken up by capillaries and carbon monoxide released d. none of the above
  2. What is the source of CO 2 in our bodies? a. it is a waste product formed during reactions of cellular respiration b. it is a by-product of blood clotting c. it is a large percentage of the air we breathe - we simply breathe it out again d. it is produced by red blood cells e. there is no CO 2 in our body
  3. Humans have: a. positive pressure breathing b. neutral pressure breathing c. negative pressure breathing
  4. The movement of air through the lungs of birds is: a. one way b. two way c. three way d. four way e. five way
  5. How is most O 2 transported from the alveoli to the tissues? a. dissolved in the plasma b. as oxyhemoglobin c. as a bicarbonate ion d. loosely bound to water molecule e. O 2 travels freely, no assistance required for its transportation
  6. Most of the CO 2 is transported from tissues to the lungs a. dissolved in the plasma b. attached to hemoglobin c. as carbonic acid d. as carboxyl e. as bicarbonate ions
  7. Which of the following is FALSE? a. smokers cough more than nonsmokers because tobacco smoke harms the cilia b. and infection fighting cells that normally cleanse the system. Coughing is a way to clean the lungs c. breathing secondary cigarette smoke is not a serious health risk d. smoking raises blood cholesterol levels and blood pressure.

e. lung cancer and emphysema have been linked to smoking BONUS QUESTIONS

  1. Smoking kills about how many people in the U.S. each year? a. 44 b. 440 c. 4, d. 44, e. 440,
  2. Which of the following is FALSE? a. We expect that an herbivore will have a shorter alimentary canal than of a carnivore of similar size b. Many herbivorous animals have cellulose-digesting microbes in special chambers c. The digestive system of a ruminant includes of a 4-chambered stomach d. Vegetation is more difficult to digest than meat