- Study guides, Class notes & Summaries

Bio 255 Exam 1 Questions and Answers What are the two main cavities covered in lecture? Dorsal and ventral What is the function of the dorsal cavity and what two subdivisions does it contain? Protection of the nervous system; cranial cavity and vertebral cavity What is the function of the ventral cavity and what two subdivisions does it contain? Encloses internal organs; Thoracic (above diaphragm) and abdominopelvic What does the thoracic cavity contain? Pleural cavity,...

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9 pages

Written in 2025/2026

Grade A+

Pogba119

BIOS 255 Exam 2 Questions and Answers Which blood vessel class is the largest and is characterized by having a thick tunica media dominated by elastic laminae? Elastic arteries Which of the following is NOT considered an organ of the lymphatic system? Pancreas The lymphatic capillary bed drains fluid directly from where? Interstitial fluid Which blood vessel carries deoxygenated but nutrient, rich blood from the intestines to the liver? Hepatic portal vein The ma...

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2 pages

Written in 2025/2026

Grade A+

Pogba119

Bio 255 Exam 2 Questions and Answers Tunica Interna Innermost layer of blood vessels. Tunica Media Middle layer made of smooth muscle. Tunica Externa Outermost layer; anchors blood vessels. Conducting Arteries Large diameter arteries with elastic lamina. Distributing Arteries Medium arteries that supply specific organs. Resistance Arteries Small arteries; include arterioles. Vascular Resistance Opposition to blood flow in vessels. Blood V...

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7 pages

Written in 2025/2026

Grade A+

Pogba119

Bios 255 Exam 3 Questions and Answers red bone marrow and thymus What are the primary lymphatic organs? lymph nodes, tonsils, spleen What are the secondary lymphatic organs? 15% of interstitial fluid that has been absorbed by the lymphatic vessels What is lymph? A pump such as the heart What do lymphatic vessels lack? Stretching of the vessels to open valves that allow one directional flow for lymph What do lymphatic vessels rely on? from blood that is fo...

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7 pages

Written in 2025/2026

Grade A+

Pogba119

BIOS 255 Comprehensive exam Questions and Answers Which is the best example of a mechanism that contains a positive feedback loop? blood clotting What surrounds a synovial joint, encloses synovial cavity, & unites the articulating bones? articular capsule The ________ component of connective tissue is found between the cells and fibers & binds cells. ground substance Consisting of 5 fused sacral vertebrae sacrum Layer of dead skin filled with sacs of keratin str...

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3 pages

Written in 2025/2026

Grade A+

Pogba119

BIOS 255 Exam 3 Review Questions and Answers Respiratory distress syndrome (surfactant) Condition often seen in premature infants, caused by lack of surfactant, a substance that helps keep the lungs inflated and reduces surface tension in the air sacs. Without enough surfactant, the lungs collapse and there will be difficulty breathing. Conducting Zone The conducting zone of the respiratory system consists of those passages that serve only for airflow, essentially from the nostrils th...

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7 pages

Written in 2025/2026

Grade A+

Pogba119

Bio 255 Unit 4 Test Practice Questions and Answers correct Body Systemic means.... Arteries Anything that flows AWAY from the heart veins Anything that flows TO the heart Transportation Regulation Protection What are the 3 function of blood? 8% Blood is what percentage of body weight? 55% 45% In whole blood: _________% Plasma _________% Formed elements (Blood cells) Hematocrit percentage of volume of all formed elements Neutrophils 5...

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4 pages

Written in 2025/2026

Grade A+

Pogba119

Bios 255 Exam 2 Questions and Answers What types of vessels carry blood from the heart? Arteries Which type of muscle tissue is found in blood vessels? smooth Which form of membrane movement is ideal for the transport of gases? Simple diffusion Which blood vessel wall consist of a simple squamous epithelium commonly referred to as endothelium ? Tunica interna What is the primary function of cartoid sinuses? Monitoring blood pressure (Bareceptors) Which ty...

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4 pages

Written in 2025/2026

Grade A+

Pogba119

Bio 255 Exam Questions and Answers How many layers do blood vessels contain? 3 Tunica externa consists of epithelial cells, connective tissue, elastic fibers Tunica media consists of elastic fibers and smooth muscle (usually the largest layer) tunica intima (interna) endothelial cells, connective tissue Elastic arteries largest arteries by diameter, contain more elastic fibers than smooth muscle Muscular arteries (distributing arteries) contain large amo...

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2 pages

Written in 2025/2026

Grade A+

Pogba119

BIOS 255 Comprehensive Exams Questions and Answers Cation A positively charged ion primary active transport mechanism of active transport Meiosis type of cell division takes place in the sex cells to produce sperm Collagen type of fiber in extracellular matrix provides tensile strength hypertonic cause red blood cells to shrivel Stratum basale epidermis contains melanocytes on which layer eccrine sweat glands produce a thin watery sweat that regu...

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3 pages

Written in 2025/2026

Grade A+

Pogba119

BIOS 255 Comprehensive Exam Questions and Answers Stroke Volume (SV) EDV-ESV Cardiac Output (CO) SV x HR Pulse Pressure (PP) SBP-DBP Mean Arterial Pressure (MAP) diastolic pressure + pulse pressure/3 What is the QRS complex of an ECG? ventricular depolarization endocrine cells release their secretions directly into body fluids exocrine glands secrete chemical substances into ducts that lead either to other organs or out of the body nerve t...

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2 pages

Written in 2025/2026

Grade A+

Pogba119

BIO 255 lab practicum Questions and Answers roles of antigen markers that tell your body that something is foreign Roles of antibodies 1. Agglutinate Pathogens 2. Neutralizing Toxins 3. Prevent the pathogen from binding to human cells neutrophils A type of white blood cell that engulfs invading microbes and contributes to the nonspecific defenses of the body against disease. basophils release histamine eosinophils a white blood cell containing granules that ar...

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9 pages

Written in 2025/2026

Grade A+

Pogba119

BIOS 255 EXAM 2 Questions and Answers What are the 3 different layers of blood vessels? tunica intima, tunica media, tunica externa What are the three different types of arteries? elastic arteries, muscular arteries, arterioles What kind of blood do arteries carry? oxygenated blood Where do arteries carry blood? away from the heart What are the three different types of capillaries? continuous, fenestrated, and sinusoidal What cells are continuous capillar...

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2 pages

Written in 2025/2026

Grade A+

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Bio 255 Exam 4 Questions and Answers correct After the tertiary bronchi, the next smaller branch of the respiratory passageway is (are) the terminal bronchioles Which lung cell type consists of thin, flat cells that allow gas exchange? Type I epithelium Select the CORRECT statement about the pharynx. The auditory tubes open into the nasopharynx. The oropharynx does NOT include pharyngeal tonsils. Which would NOT be considered part of the conducting zone of the re...

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4 pages

Written in 2025/2026

Grade A+

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Bios255 exam 1 review kahoot Questions and Answers Which leukocyte releases histamine and heparin? basophil Select all granulocytes neutrophil eosinophil Components of blood plasma albumin Na+ Which molecule is involved in reducing loss from a damaged blood vessel? thrombocyte Identify the following leukocyte monocyte Identify the leukocyte lymphocyte Identify the leukocyte neutrophil What does oxygen binds to within hemoglobin molecules...

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2 pages

Written in 2025/2026

Grade A+

Pogba119

Bio 255 Week 4 Questions and Answers perforating canal runs ______ to the ling axis of the bone perpendicular central canal runs _____ to the long axis of the bone parallel what major structures run through the canals blood vessels, nerves, lymph nodes periosteum is located on the inner or outer surface of the bone? outer endosteum is located on the inner or outer surface of the bone? inner what connects the periosteum to compact bone? perforating fibers...

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4 pages

Written in 2025/2026

Grade A+

Pogba119

BIO 255 EXAM 3 Questions and Answers The parasympathetic nervous system is a subdivision of the autonomic nervous system The subdivision of the nervous system innervating skeletal muscles is called the somatic nervous system Neuroglia that control the chemical environment around neurons and affect neuron signalling via gap junctions astrocytes The cells that myelinate neurons of the peripheral nervous system are Schwann cells Motor neurons are ____ and sensory ne...

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11 pages

Written in 2025/2026

Grade A+

Pogba119

BIOS 255 EXAM 1 Questions and Answers Buffy coat What is the name of the RBC layer that is formed after blood is centrifuged? a. Buffy coat b. Plasma c. Hematocrit d. Rubro layer d. O- Which blood type is considered the universal donor? a. AB+ b. AB- c. O+ d. O- a. Neutrophils b. Basophils d. Eosinophils Which of the following WBC types is considered granular? (Select all that apply) a. Neutrophils b. Basophils c. Monocytes d. Eosinophils e. Lymphocytes ...

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5 pages

Written in 2025/2026

Grade A+

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Bios 255 Final Exam Questions and Answers Th pleural lining of the lungs Parietal pleura Visceral pleura Pleural space 3 muscles involved in inspiration and expiration Diaphragm, internal, and external intercostals Minute ventilation formula Minute ventilation= tidal volume x breathing rate What is the difference between lymph and interstitial fluid? Lymph is located around lymphatic vessels, interstitial fluid is around cells What types of diseases attacks you...

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1 pages

Written in 2025/2026

Grade A+

Pogba119

Bio 255 Chapter 5 Questions and Answers The chemical substance that enters the Krebs cycle for further metabolism is acetyl-CoA The replacement of electrons lost from chlorophyll molecules in photosynthesis in certain microorganisms depends on the presence of Water Molecules The ultimate fate of electrons transported through the electron transport chain is to unite with a molecule of Oxygen _____________ tests are used to determine whether an organism can ferment a carbo...

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2 pages

Written in 2025/2026

Grade A+

Pogba119