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Anatomy &Physiology
midterms
| Question | Answer |
|---|---|
| define anatomy | Study of body parts visible to the naked eye, such as heart or bones |
| define physiology | the study of the function of body parts and the body as whole. |
| Explain how anatomy and physiology are related | Parts of your body form a well-organized unit, and each of those parts has a job to do to make the body operate as a whole. Structure determines function |
| Name the levels of structural organization that make up the human body and explain how they are related | Atoms, cell, tissue, organ, organ system organism. |
| Organ system: integumentary system | For external body covering, sweat and oil glands, location of cutaneous. SKIN |
| Organ system: skeletal system | protects & supports body organs, provides framework for muscles, blood cells are formed within bone, stores minerals |
| Organ system: muscular system | movement, facial expression,posture, produces heat |
| Organ system: Nervous system | fast acting control of the body, responds to internal and external change by activating muscles and glands. |
| Organ system: Endocrine system | glands secrete hormones that regulate certain processes in cells like: growth, reproduction, nutrient use |
| Organ system:Cardiovascular system | Blood Vessels transport blood which carry: oxygen, carbon dioxide, waste. The heat pumps blood. |
| Organ system: Lymphatic system | picks up fluid leaked from blood vessels and returns it o blood. Disposes of waste in lymphatic stream, involved in Immunity |
| Organ system: Respiratory System | Keeps blood constantly supplied with oxygen, and removes carbon dioxide. Gas exchanges occur through the lungs |
| Organ system: Digestive System | Breaks down food into absorbable units that enter the blood for distribution to body cells. What ever is not used is disposed as feces. |
| Organ system: Urinary System | Eliminates nitrogenous waste from body. Regulars water, electrolytes. Acid base balance of the blood |
| Organ system: Reproductive System | Production of offspring. Males: testes-produce sperm and male hormone (Estrogen) Females: ovaries-produce eggs and female sex hormone (testosterone) |
| The functions that humans must perform to maintain life | Movement, Digestion, Metabolism, Reproduction, Growth |
| Metabolism | Breaking down larger structures into simpler building blocks, making larger structures from smaller ones |
| Define Homeostasis | The body's ability to maintain relatively stable internal conditions. |
| Importance of Homeostasis | A body's normal balance system |
| Negative feedback | Includes most homeostatic control mechanisms. Shuts off the original stimulus, or reduces its intensity. Works like a household thermostat |
| Anatomical Planes: Saggital Section | Divides the body to left and right (mid line) |
| Anatomical Planes: Frontal (Coronal Section) | Divides the body into anterior and posterior |
| Anatomical Planes: Transverse section | cuts the body into inferior and superior |
| Body Cavities: Dorsal Body Cavity | BACK Cranial Cavity & Spinal Cavity |
| Body Cavities: Ventral Cavity | FRONT Thoracic Cavity & Abdominal Cavity |
| The parts of an atom | Protons(+) Neutrons Electrons |
| Isotope | Have the same # of protons, Vary in # of neutrons. |
| 96% of the body is composed of which elements | Carbon (C) Oxygen (O) Hydrogen (H) Nitrogen (N) |
| Importance of water | Most abundant inorganic compound, Vital properties: high heat capacity, Polarity/solvent properties, chemical reactivity, cushioning |
| How is the molecule held together | Hydrogen Bonds and so is DNA |
| Calcium | Ca |
| Carbon | C |
| Hydrogen | H |
| Oxygen | O |
| Nitrogen | N |
| Sodium | Na |
| Phosphorous | P |
| 3 types of bond | Covalent, Ionic, Chemical |
| Covalent Bonds | shared |
| Ionic Bonds | Charged |
| Hydrogen Bonds | Mixed |
| 4 organic molecules that make up the human body components | Carbohydrates, lipids, Proteins, & Nucleic Acid |
| Cell | Basic unit of life |
| Organelle | Metabolic machinery of the cell, "little organs" that perform functions for the cell |