A&P 1 biol 2301 ch 1
_________are the smallest units of matter having the chemical properties of the element
Atoms
Rank the following terms from simplest to most complex. Remember to start with the most simple structure first
Atoms, molecules, macromolecules, organelles, cells
Rank the following terms from simplest to most complex
Cells, tissues, organs, organ systems, organism
The chemical level of an organization is
Composed of atoms and molecules, the simplest level of organization
In a homeostatic control mechanism, the_____________ ____________ is the structure that interprets input from the receptor and initiates changes through the effector
Control center
__________ anatomy is also called macroscopic anatomy
Gross
____________ describes an investigation of the structure and relationships of body parts that are visible to the unaided eye?
Gross anatomy
_________refers to the body's ability to maintain a relatively stable internal environment in response to changing internal or external conditions
Homeostasis
Fill in the correct term for the following sequence: macromolecules, organelles, cells, tissue, ___________, organ systems, organism
Organs
__________ study the function of body parts
Physiologists
____________examines the function of various organ systems
Physiology
Match the word on the left with the description on the right of how body temperature stimulates a negative feedback mechanism when body temperature falls below normal, receptor-, control center-, effectors-, stimulus-, homeostasis-,
Receptor- free nerve endings in the skin detect cold Control center- hypothalamus of the brain sets body temperature Effectors- blood vessels in the skin constrict, muscles shiver Stimulus- cold temperature lowers body temperature below normal Homeostasis- body temperature returns to normal
Match the homeostatic control mechanism on the left with its description on the right. Receptor-, control center-, effector-,
Receptor- perceives the stimulus Control center- integrates input and initiates change Effector- brings about a change in response to the stimulus
___________ are the homeostatic components that typically consists of sensory neurons that detect changes in temperature, chemicals or muscles stretch
Receptors
_________may explore all of the body structures in the anterior neck
Regional anatomy
Which of the following are characteristics of all living things?
Responsiveness to stimuli, reproduction, regulation of internal functions
Anatomy is the study of what
Structure, form
Cytology refers to
The study of cells and their internal structures
True or false: sometimes a homeostatic imbalance occurs when a variable normally controlled by negative feedback is instead controlled by positive feedback
True