Exam II StudyGuide

Exam II StudyGuide - HUMAN BIOLOGY HSCI 100:Things to know...

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HUMAN BIOLOGY HSCI 100:Things to know and study for ExamII Chapter 4 - Lecture 7 What is a tissue? A group of cells of the same origin that carry out a specific function. Organ? A collection of tissues to serve a common function. Organ system? A group of organs cooperate together for a function. What are the 4 main types of tissue? What do these tissues look like, how do they function and where are they found Muscle tissue:skeletal muscle are involved in movement of bones and breathing. -smooth muscles-in walls of blood vessels and organs,regulates blood pressure and aids in digestion -cardiac muscle is found in the walls of the heart,its has striations, involuntary contraction for most part, pumps blood thus brining oxygen throughout the body. Nerve tissue: receives stimuli & conducts nerve impulses;transmits impulses by a chemical called neurotransmiters.Found in the nervous system ie brain, spinal cord. Epithelial tissue covers body surfaces and lines body cavities providing barriers from external environment and the organ it covers.(formed by layers of cells) Connective tissue binds and supports body parts; has ability to stretch and contract passively,made of extracellular matrix. What is the integumentary system and its main roles? It is the organ system that protects body fom damage(skin,hair,nails etc). It excretes wastes, regulates temperature, cushion and protect deeper tissues, vitamin D synthesis,attachement site for sensory receptors. How is epithelial tissue organized? Arranged in broad sheets or tube like structures. What is homeostasis and how is it maintained? Ability to maintain a relatively constant internal environment in the body. Maintains homeostasis via negative feedback (sensor & control centre) Positive feedback(increase change in one direction) What are stem cells? They are an internal repair system that replenish other cells and can differentiate to specific cells. What is cloning and what may it be used for? Cloning is producing a genetically identical “individual”. Used for creating copies of DNA fragments, cells, organisms.(replication) Chapter 5 – Lecture 10 What are the functions of the cardiovascular system? Generate blood pressure, transports blood and other components,exchange of nutrients and waste at capillaries,regulate blood flow. What is the anatomy of the heart and the blood vessels (veins and arteries)? see heart diagram What is the path of blood flow through the heart and the pulmonary and systemic circuits in the body? The heart: Rt. Atrium-->Rt AV valve(tricuspid)-->Rt ventricle-->pulmonary artery--> lungs-->pulmonary veins-->Lt. atrium-->Lt Av valve(mitral)-->Lt venricle-->aorta
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Exam II StudyGuide - HUMAN BIOLOGY HSCI 100:Things to know...

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