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