Bio 242 exam 2 Study guides, Class notes & Summaries

BIO 242 Lecture Exam 2 Questions with Complete Solutions

Bio 242 - Exam 2 Latest Version with Verified Solutions What type of root system characterizes monocots? Fibrous What is the predominant root system found in eudicots? Taproot What term describes the symbiotic relationship between plants and fungi (hyphae), which enhances surface area for nutrient absorption? Mycorrhizae Where on a stem do leaves attach? Nodes What are the segments of a stem where no leaves attach called? Internodes 2 What are terminal buds...

Bio 242 - Exam 2 Questions and Answers (100% Pass)

BIO 242 A Final Exam Questions and Answers Already Passed What defines the threshold of a neuron? a. The time between neurotransmitter binding and action potential firing. b. The voltage causing sodium ion inflow and reversal of resting potential. c. The total sodium ions entering before inactivation gates close. d. The neurotransmitter amount needed to trigger an action potential. e. The voltage across the resting cell membrane. c. The total number of sodium ions that enters the ce...

BIO 242 EXAM 3 QUESTIONS AND ANSWERS ALREADY PASSED Which defenses are considered nonspecific and innate? A. Primary defense B. Secondary defense Differentiate between the components of the primary and secondary lines of defense. PRIMARY: Physical and chemical barriers SECONDARY: Phagocytosis, inflammation, fever, antimicrobial proteins What region of the human body is safeguarded by fatty acids, acidic pH, lactic acid, and a resilient cell barrier with its own normal biota? ...

Bio 242 - Exam 2 Questions And Answers With Verified Solutions (GRADED A+)

BIO 242 Exam 2 UPGRADE A+ Voltage gated Calcium channels tend to be located where in the neuron? - soma - axon - axon terminal - CORRECT ANSWER-axon terminal When a cell depolarizes it becomes more... - CORRECT ANSWER-positive graded potential is initiated by a stimulus and results in a __________________ change in membrane potential. - small - large - no - CORRECT ANSWER-small During relative refractory period will an action potential be triggered by any stimulus? - CORRECT ANSWER-...

Bio 242 Exam 2 Questions And Answers With Verified Solutions Already Passed!!!

BIO 242 Lecture Exam 1 Questions and Answers 100% Pass What are the primary functions of blood in the body? Blood carries oxygen from the lungs to cell tissues and picks up carbon dioxide from tissues to transport it back to the lungs. How many oxygen molecules can a single red blood cell carry? Over 1 billion What percentage of body weight does blood account for? 8% What are the normal counts of white blood cells and red blood cells in a cubic millimeter of blood? ...

BIO 242 EXAM 2 PRACTICE QUESTIONS CH 4 The resting potential is typically - CORRECT ANSWER--70mV Membrane channels are formed by ______ that span the thickness of the membrane - CORRECT ANSWER-Proteins _____ carry signals toward the cell body, while ____ carry action potentials away from the cell body - CORRECT ANSWER-Dendrites; Axons The first portion of the axon plus the region of the cell body from which the axon leaves is known as the - CORRECT ANSWER-Axon hillock Contains nucleu...