A&P(Chap. 1) Flashcards
What is Histology?
Study of microscopic structure of tissue
What is a biomolecule?
A molecule present in living organisms
What are the four classes of biomolecules?
Protein
Lipid
Nucleic acid
Carbohydrate
What does structure determine?
Function
What does function modify?
Structure
What does the mitochondria produce?
ATP
What are the first five levels of organization?
Cell
Tissue
Organ
Organ System
Organism
What are the characteristics of living organisms?
Energy is produced and consumed
Adaptability
Reproduction
Growth and repair (ability to heal)
What is the smallest functional unit of life?
A cell
What three things do all cells consist of?
All cells are composed of a:
Membrane
Genetic Material
Cytosolic (fluid portion of cytoplasm)
What are the four major categories of tissue?
Epithelial
Muscle
Nervous
Connective
What is the function of epithelial tissue?
Form a protective barrier (ex. skin)
What is the function of connective tissue?
Supports, protects, and gives structure to other tissues in the body
What is the function of nervous tissue?
Sense stimuli and send signals back to brain
What is the function of muscle tissue?
Allow movement of body parts
What are the 11 major organ systems in the human body?
Musculoskeletal
Circulatory (cardiovascular)
Digestive
Reproductive
Nervous
Integumentary
Endocrine
Immune/Lymphatic
Respiratory
Urinary
Skeletal
What is homeostasis?
Balance among body system so organelle can survive
What is the homeostatic set point?
The threshold required for the body to maintain homeostasis?
What is the hypothalamus?
The part of the brain that monitors homeostasis
What is a feedback control loop?
Refers to a system output relaying feedback so input can be adjusted.
What is positive feedback?
A feedback loop that AMPLIFIES change
What is a negative feedback loop?
A feedback loop that REGULATES change
What is plasma?
Fluid part of blood where cells are suspended
What is Intracellular fluid (ICF)?
Fluid within cell
Extracellular fluid (ECF)?
Fluid outside of cells
What percentage of total body fluid is ICF?
60%