A&P - Chapter 1 - connect

Palpation

when a doctor feels for a swollen lymphnode

What is Gross anatomy

a structure that can be seen with the naked eye

What are the levels of structural of hierarchy in the body in order of complexity?

atom - cell - tissue - organ - organ system - organism

What are organelles composed of?

molecules

An organelle is best described as what?

a microscopic structure in a cell that carries out an individual function

What is the ability of nerve and muscle cells to produce quick reactions called

excitability

What is the body tendency to maintain relatively stable internal conditions in spite of greater changes in its external environment called?

homeostasis

Dynamic equilibrium is what

When conditions are constantly changing a little, but they stay around the same average point

The name for a structure that is specialized to detect a stimulus is ____?

receptor

Without the use of energy, matter tends to flow ____ gradients

down

What is the plural form of cortex?

cortices

Describe the arboreal habitat

A habitat primarily in trees

Define effector

a cell or molecule that produces a response when it receives a signal

ex: muscle gland

List the parts of the homeostatic feedback loop and what they do…

receptors - notice the problem - it senses when something in the body has changed

Integrator - decides what to do - it receives information from receptors and figures out what to do next

effector - does the action - ex: muscle or gland

what is negative and positive feedback (what it does, how it works)

neg - brings you body back to normal set point, acts like a home thermostat

pos - speeds up change and pushes to the processes of completion, then stops (ex: going into labor)