Chapter 1 Self Assessment. Characteristics of Living Organisms Living Organisms share distinct properties: __________ are basic units of life Smallest.

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Presentation transcript:

Chapter 1 Self Assessment

Characteristics of Living Organisms Living Organisms share distinct properties: __________ are basic units of life Smallest unit that can carry out functions of life All organisms are composed of ______. © 2016 Pearson Education, Inc.

Characteristics of Living Organisms Living Organisms share distinct properties: Cellular composition: cells are basic units of life Smallest unit that can carry out functions of life All organisms are composed of cells © 2016 Pearson Education, Inc.

Characteristics of Living Organisms Living Organisms share distinct properties (continued): Metabolism: Chemicals – substances with unique molecular composition; used in or produced by chemical reactions Living organisms carry out a number of chemical reactions collectively known as __________. Metabolic process either build up or break down substances depending on needs of organism © 2016 Pearson Education, Inc.

Characteristics of Living Organisms Living Organisms share distinct properties (continued): Metabolism: Chemicals – substances with unique molecular composition; used in or produced by chemical reactions Living organisms carry out a number of chemical reactions collectively known as metabolism Metabolic process either build up or break down substances depending on needs of organism © 2016 Pearson Education, Inc.

Living Organisms share distinct properties (continued): _____________ – process that an organism uses to eliminate potentially harmful waste products created by metabolic processes ___________ or __________– ability of organisms to sense and react to changes or stimuli in their environment

Living Organisms share distinct properties (continued): Excretion – process that an organism uses to eliminate potentially harmful waste products created by metabolic processes Responsiveness or irritability – ability of organisms to sense and react to changes or stimuli in their environment

Levels of Structural Organization and Body Systems © 2016 Pearson Education, Inc. Figure 1.4 Six structural levels of organization of the human body.

Levels of Structural Organization and Body Systems Body’s organs are grouped into ________; consist of two or more organs that together carry out a broad function in body Human body has _______ organ systems (Figure 1.5) Organs and organ systems work together to ensure survival of organism as a whole Organ systems function together to make up complete _________ (human body) © 2016 Pearson Education, Inc.

Levels of Structural Organization and Body Systems Body’s organs are grouped into organ systems; consist of two or more organs that together carry out a broad function in body Human body has 11 organ systems (Figure 1.5) Organs and organ systems work together to ensure survival of organism as a whole Organ systems function together to make up complete organism (human body) © 2016 Pearson Education, Inc.

Types of Anatomy and Physiology Study of human body (continued): _________ __________– studies surface markings of body _________ _________– examines structures that can be seen with unaided eye __________ ___________ – studies structures that can only be seen with aid of a microscope; include: Histology (study of tissues) and Cytology (study of cells) © 2016 Pearson Education, Inc.

Types of Anatomy and Physiology Study of human body (continued): Surface anatomy – studies surface markings of body Gross anatomy – examines structures that can be seen with unaided eye Microscopic anatomy – studies structures that can only be seen with aid of a microscope; include: Histology (study of tissues) and Cytology (study of cells) © 2016 Pearson Education, Inc.

_______ __________– study of structure or form of human body _________ _________– study of body’s functions

Human anatomy – study of structure or form of human body Human physiology – study of body’s functions

Core Principles in A&P Feedback Loops Core Principle – two mechanisms vital to maintenance of homeostasis (Figures 1.13, 1.14): Positive feedback loops – less common than negative feedback loops; effector activity _______and ________ initial stimulus; shuts off when conditions return to the normal range © 2016 Pearson Education, Inc.

Core Principles in A&P Feedback Loops Core Principle – two mechanisms vital to maintenance of homeostasis (Figures 1.13, 1.14): Positive feedback loops – less common than negative feedback loops; effector activity increases and reinforces initial stimulus; shuts off when conditions return to the normal range © 2016 Pearson Education, Inc.

Core Principles in A&P Negative feedback loops (continued): Negative feedback loops – ______ initial change in a regulated variable; _____ output When a change in status of a regulated variable is detected, a series of events is triggered to return variable to its normal value © 2016 Pearson Education, Inc.

Core Principles in A&P Negative feedback loops (continued): Negative feedback loops – oppose initial change in a regulated variable; reduce output When a change in status of a regulated variable is detected, a series of events is triggered to return variable to its normal value © 2016 Pearson Education, Inc.