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Intro to Human Body
Introduction to the human body
| Question | Answer |
|---|---|
| Define the terms anatomy and physiology. | Anatomy is the study of structure and the relationships among structures. Physiology is the study of the function of body parts. |
| List in order, from the lowest to the highest, the levels of structural organization within the human body. | Chemical, Cellular, Tissue, Organ, System, Organism |
| List the principal systems of the human body. | Integumentary, Skeletal, Muscular, Nervous, Endocrine, Cardiovascular, Lymphatic, Respiratory, Digestive, Urinary, Reproductive. |
| Describe the functions of the following systems: a) Integumentary b) Endocrine | Integumentary system protects the body; synthesizes vitamin D; receives external stimuli such as temperature, pain, and pressure; and helps regulates body temp Endocrine system produces hormones and releases them into the blood to regulate metabolism |
| Describe the functions of the following systems: c) Respiratory d) Urinary | The respiratory system supplies oxygen to the body, removes carbon dioxide from the blood, and helps to regulate pH levels. The urinary system regulates the chemical composition of body fluids and eliminates wastes from the body. |
| List 3 criteria that distinguish living from non-living forms: | a) Metabolism - all chemical reactions of the body b) Responsiveness - detection of and response to stimuli c) Movement - motion of cells, the body |
| List 3 more criteria that distinguish living from non-living forms: | d) Growth - increase in size and complexity e) Differentiation - specialization of cells f) Reproduction - new cells or new individual |
| What is meant by the term anatomic position? | A specific position for observing and analyzing that is precise and consistent. |
| Define the following directional terms: a) Inferior b) Medial c) Proximal | a) Inferior—away from the head, towards the lower end of a structure b) Medial—nearer to the midline of the body or structure c) Proximal—nearer to the point of attachment or origin of a structure; closer to the main axis of the body |
| Define a frontal and a midsagittal plane. | The frontal plane divides the body or an organ into anterior and posterior portions. The midsagittal plane is a vertical plane that divides the body or an organ into equal right and left halves. |
| Describe the following body cavities: a) Cranial b) Thoracic c) Pericardial | a) Cranial cavity—the cavity formed by the cranial bones of the skull b) Thoracic cavity—that portion of the ventral body cavity above the diaphragm c) Pericardial cavity—the tiny space between the parietal and visceral pericardium |
| Name the four abdominopelvic quadrants: | a) Right upper quadrant b) Left upper quadrant c) Right lower quadrant d) Left lower quadrant |
| Name the indicated abdominopelvic regions in Fig. 1 | a) Right hypochondriac b) Left lumbar c) Right iliac (inguinal) d) Umbilical |
| Define homeostasis. | Homeostasis refers to the normal physiological condition of the body, and the tendency of the body to maintain that condition, despite changes inside and outside of the body. |
| Define symptom | A symptom is a subjective change in function that cannot be determined by an observer. |
| Define sign. | A sign is a change that can be observed or measured. |
| Define positive feedback and negative feedback by illustrating their main differences | Positive feedback is a situation in which the response to a particular stimulus increases the stimulus, which, in turn, increases the response. Negative feedback is a situation in which the response to a particular stimulus counteracts the stimulus. |
| Which of the following lists is arranged in the correct order from the most complex to the simplest level? | Organism, system, organ, tissue, cellular, chemical |
| _______________ is the change that a cell undergoes from an unspecialized to a specialized state. | Differentiation |
| The human skin belongs to what major body system? | Integumentary |
| Which plane is vertical and divides the body into right and left sections? | Sagittal |
| Which of the following are considered to be dorsal (posterior) body cavities? | Cranial and vertebral cavities |
| Which directional terms describe the relationship of your navel to your right shoulder? | Inferior and medial |
| Which directional term means nearer to or at the front of the body? | Anterior |
| Which directional term means farther from the midline? | Lateral |
| The description of any region of the body, such as directions and planes, assumes that the body is in the _____________ position. | Anatomical |
| A feedback system consists of three basic components: a control centre, a receptor, and a(n): | Effector |
| If a response enhances an original stimulus, the system is classified as a ____________ feedback system. | Positive |
| The homeostatic responses of the body are regulated by which two systems? | Endocrine, nervous |