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Bio practice questions

by: Laura Anchondo

Bio practice questions Biology 5B

Laura Anchondo

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These are the types of questions that are asked on the midterms and finals.
Biology 5B: Organismal Biology (Chappell/Litt)
Professor Chappell/Litt
Animal physiology, Biology
75 ?




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This 3 page Bundle was uploaded by Laura Anchondo on Sunday October 16, 2016. The Bundle belongs to Biology 5B at University of California Riverside taught by Professor Chappell/Litt in Fall 2016. Since its upload, it has received 2 views. For similar materials see Biology 5B: Organismal Biology (Chappell/Litt) in Biological Sciences at University of California Riverside.

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Date Created: 10/16/16
1. Which of the following DOES NOT occur when a muscle contracts? a. ATP is required for releasing the myosin ATPase from actin. b. Heat is released as a result of the mechanism of contraction. c. Thick filaments become attached to the z-line in the sarcomere. d. Calcium ions diffuse down a concentration gradient. e. Cross-bridges cycle asynchronously. 2. Which of these statements about animal reproduction is not accurate? a. gender is always determined genetically (e.g, X and Y chromosomes) b. if offspring need little parental care, males experience selection to compete for access to females c. in many species, females benefit from mating with many males d. in both sexes, fitness is defined by reproductive success, not survival ability e. males and females provide parental care only when it increases their reproductive success 3. Which of the following statements about the transport of oxygen and CO2 in a mammal is true? a. Both enter and leave the circulatory system by active transport across capillary walls. b. Breathing rate is normally controlled by blood concentrations of both gases. c. Both cause substantial changes in pH when they dissolve in blood or tissue fluids. d. Both require expenditure of ATP for transport within the body. e. Concentrations of both in the veins and pulmonary artery will increase if an animal becomes more active. 4. Freshwater bony fish, marine bony fish, and marine sharks have osmoregulatory problems. Which characteristic is common to ALL THREE kinds of fish? a. A large flux of salt through the gills. b. A large flux of water through the gills. c. Production of urine isotonic to the blood. d. Production of urine hypertonic to the blood. e. Use of urea and TMAO to make the body fluids isotonic to the surrounding water. 5. Suppose you were the discoverer of the homeostatic functions of the two hormones now called aldosterone and vasopressin. If you had the opportunity to name them, which of the following are the best choices for aldosterone and vasopressin (in that order)? a. “reproductive control hormone” and “cardiac output hormone” b. “salt retention hormone” and “water retention hormone” c. “vascular control hormone” and “urine osmolarity hormone” d. “urea excretion hormone” and “water retention hormone” e. “glomerular permeability hormone” and “countercurrent control hormone” 6. Suppose you found a new family of marine fishes. Which of the following statements is the least logical prediction of what nitrogen excretion product these fish use: a. urea, because most marine fish lose water osmotically through the gills. b. ammonia, because excretion of nitrogen as ammonia is energetically inexpensive. c. urea, because it can be stored as a relatively non-toxic solute in order to raise the osmolarity of tissue fluids so as to minimize osmotic water loss through the gills. d. uric acid, because it can be stored as a relatively non-toxic solute in order to raise the osmolarity of tissue fluids so as to minimize osmotic water loss through the gills. e. urea, because it can be excreted at high concentrations to minimize water loss. 7. Which of the following statements about sensory mechanisms is correct? a. Auditory transduction resembles interactions between peptide hormones and their receptors. b. The brain decodes the intensity of a sound stimulus from which auditory neurons are active. c. Photoreceptor transduction involves hydrogen bonding (cohesion) of a photon to a receptor. d. The brain determines auditory frequency from which region of the Organ of Corti is producing action potentials. e. Sense organs usually code signal intensity on a linear scale. 8. Most fish are water-breathing ectotherms, but despite this many fish swim continuously throughout their lives. Based on your understanding of gas exchange in water, and the single circulation and energy metabolism of fish, the most likely reason this is possible is: a. These fish live in water that contains nearly as much oxygen per liter as air does. b. These fish have very low resting (basal) metabolism, so their exercise capacity is very high. c. These fish live in warm water, so they can more easily obtain dissolved oxygen to support exercise. d. The energy cost -- and hence oxygen delivery requirement -- of swimming is quite low. e. Fish hemoglobin carries more oxygen per molecule than mammal hemoglobin.


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