Chapter #1 Introduction
Used to investigate the human body, ____________ tests a hypothesis, then rejects or accepts it based on the results of experiments or observations.
What is the scientific method?
Tissues are organized into ____________
What are organs?
Where a particular value should be.
What is set point?
The largest percentage of muscles in the muscular system consists of _____, which are attached to bones and enable voluntary body movements.
What are skeletal muscles?
There are three types of muscle tissues (skeletal, smooth, and cardiac). Which one is under voluntary control?
What is skeletal muscle tissue?
Concerns the functions of the body parts-what they do and how they
What is physiology?
Are traits all organisms share.
What are characteristics of life?
Requirements of organisms are:
What is water, food, oxygen, heat and pressure?
Besides skeletal muscles, the muscular system also includes__________ — which makes up the walls of the heart — and smooth muscles, which control movement in other internal organs and structures.
What is cardiac muscle?
Cardiac muscle tissue is found only in______________
What are in the walls of the heart?
Small molecules can combine in complex ways to form larger _________
What are macromolecules?
Acquisition and use of energy constitute ________.
What is metabolism?
The body maintains homeostasis through several self-regulating control systems, that share three components:
what are receptors, set point, effectors?
Besides skeletal muscles, the muscular system also includes_________ , which control movement in other internal organs and structures.
What are smooth muscles?
Is the most common type of muscle tissue in the human body.
What is Skeletal muscle tissue?
Is composed of atoms.
What is matter?
Homeostatic mechanisms act through
What is negative feedback?
It usually produces unstable conditions, which might seem incompatible with homeostasis.
What is positive feedback mechanism?
Are responsible for virtually all the movements of the body, both inside and out.
What are muscle contractions?
Contractions of smooth muscles are _________, so they are not under conscious control.
What is involuntary?
Maintenance of a stable internal environment is called
What is homeostasis?
Characteristics of life include:
What is movement, responsiveness, growth, reproduction, respiration, digestion, absorption, circulation, assimilation, and excretion?
A homeostatic mechanism works as follows: if the receptors measure deviations from a set point, effectors are activated that can return conditions toward normal. This is called ________________
What is negative feedback?
A process that moves conditions away from the normal state is called a _____________
What is positive feedback mechanism?
Is the muscle that performs the greatest amount of physical work in a lifetime.
What is the heart?