a&p chapter 1

Place the levels of structural hierarchy in the body in order of complexity, from most complex to least complex.

1. organism 2. organ system 3. organ 4. tissue 5. cell 6. atom

An organelle is best described as which of the following?

A microscopic structure in that carries out individual function

An organ is best described as which of the following?

A structure composed of at least two different tissues, with recognizable boundaries, and with discrete function.

Is the study of body structures.

Anatomy

a ____________ is a dead human body, commonly used in dissection for the purpose of training student in anatomy.

Cadaver

Father of the theory of natural selection?

Charles Darwin

<nowiki> What is the name for the process of carefully separating tissues to reveal anatomical relationships?

Dissection <nowiki>

A relatively stable internal environment in spite of greater changes in the external environment is known as

Homeostasis (outside changes don't affects)

matching terms

Neurophysiology = Physiology of the nervous system Endocrinology = Physiology of hormones Pathophysiology = Study of disease mechanisms Comparative Physiology = Study if how biological processes vary in different animal species

features of an arboreal habitat?

Relatively less competition Rich supply of leaves and fruit relative safety from predators

A group of organs working together for a coordination function is an organ ___

System

By definition, a (n) ______ is the smallest particle of matter with unique chemical properties.

atom

A (n) __________ is the smallest unit of an organism that can carry out all the functions of life.

cell

The structure that encloses a cell and controls the traffic of molecules in and out of the cell is the ______ membrane.

cell

which forces can act as selective "pressure"?

climate, predators, disease, competition, and the availability if food,

examples of a positive feedback mechanism?

contractions during childbirths, formation of a blood clot.

______ equilibrium occurs when there is a set average point and conditions fluctuate around that point.

dynamic

A (n) __________ is a molecule, cell, or organ that directly carries out a response to a stimulus.

effector

A change in the relative frequencies of alleles in a population over a period of time is called.

evolution (Evolution is change)

A general process of eliminating metabolic waste product from the body is called

excretion

A negative feedback system trends to strengthen or reinforce a stimulus.

false (A negative feedback mechanism is a self-corrective mechanism in which a bodily change is detected and responses are activated that reserve the change and restore stability and preserve normal body function. it is a positive feedback mechanism that strengthens or reinforces a stimulus.)

A difference in chemical concentration, electrical change, physical pressure, temperature, or other variable between one point and another is a

gradient

the field that focuses on body structures that can be observed without magnification is called

gross

The study of tissues, or groups of cells and their surrounding extracellular materials, is called

histology

A molecule of large size and high molecular weight, such as a protein, nucleic acid, polyacrylamide, or triglyceride is called a

macromolecule

A (n) _________ is made up of two or more atoms. made by joining two or more different atoms together

molecule

The term that indicates a single complete individual is

organism

which term specifically refers to study of how biological organisms and their parts function?

physiology

A self-exemplifying cycle in which a physiological change leads to an even greater change in the same direction is known as ____ feedback

positive

A cell or organ that is specialized to detect a stimulus, such as a taste cell or a rod or cones of the eye, is callled

receptor

name for the forces promoting the reproductive success of some individuals over others.

selection pressures

Organisms respond to _______, or changes in their environment.

stimuli

An aggregation of cells and extracellular materials, which perform discrete function, is known as. a

tissue