Exam 1 Questions Flashcards
5 main points of anatomical position
Standing erect, facing forward, feet facing forward, palms open, and hands down at sides
Name 5 Macronutrients
Water, carbs, protein, lipids, and nucleic acids
Name 2 micronutrients
Vitamins and minerals
What happens when body temp is too high or too low?
Chemical reactions (metabolism) cannot occur
What 2 things is homeostasis maintained by?
Negative and Positive Feedback
What speeds up chemical reactions?
Enzymes
Organic vs Inorganic compounds
Organic ALWAYS contains carbon and hydrogen and typically contains oxygen, nitrogen and sulfur. Inorganic may or may NOT contain hydrogen or carbon (NEVER BOTH), water, acids/bases and salts are biologically important
4 main groups of organic
Carbs, proteins, lipids, and nucleic acids
What makes up 70% of the human body?
Water
Functions of water (name 4)
Lubrication, cushion, moderates heat, and transportation
What can separate ions?
Water
What do acids release into a solution?
H+ ions
What do bases release into solutions?
OH- ions
What are acids and bases important for?
Digestion and metabolism
On the pH scale, each number is __x higher than the previous number
10
Normal blood pH
7.4
Functions of Carbohydrates
Energy source and structural (Glycocalyx for cell identification)
Functions of proteins
Make enzymes, structural (keratin, actin and myosin for muscles), and chemical messengers (hormones, neurotransmitters)
Function of RNA
Aids protein synthesis
Name 3 types of lipids
Triglycerides, phospholipids, and steroids
Name 4 functions of triglycerides
Energy source, cushioning, insulation, and absorption of some vitamins
Saturated vs Unsaturated fats
Saturated are solid at room temp and have only single bonds in fatty acid chains. Unsaturated are liquid at room temp and have one or more double bonds in a fatty acid chain.
Example of a steroid
Cholesterol
What type of solution can maintain a stable pH
Buffer