Introduction To Cells Flashcards
What is feedback/loop system?
Regulates system and responds.
What is homeostasis?
The attempt to maintain a consistent environment.
Receptor?
Detects a change in the environment.
Control center?
Processes info., determines body response to environment, usually CNS.
Effector?
Carries out change determined by control center.
What is negative feedback loop?
Attempts to reverse a change in the body (most common) example weight loss.
What is positive feedback loop?
Reinforced a change being made in the body, examples blood clotting and delivery process.
Define anatomical position.
Frame of references for describing parts of the body.
Where is the superior (cranial/ cephalic)?
Towards the head.
Where is the inferior (caudal)?
Towards the “tail” bottom.
Where is the posterior (dorsal)?
On the back surface.
Where is the anterior (ventral)?
On the front surface.
Where is medial?
Toward the midline of the body.
Where is lateral?
Towards the side of the body.
Where is distal?
Away from the center/ core of the body.
Where is proximal?
Closer to the center/ core of the body.
Where is superficial?
Towards the surface.
Where is deep?
Below the surface.
Where is prone?
Lying face down/ front down.
Where is supine?
Lying face up/ back down.
What does sagital mean?
Cuts body into right and left parts.
What does midsagital mean?
Cuts the body into equal right and left parts.
What does frontal/ corona mean?
Cuts body into front and back parts.
What does transverse/ horizontal mean?
Cuts body into top and bottom parts.
DNA?
Deoxyribonucleic acid, protein that is genetic blueprints for every structure in the body.
Double helix?
DNA is coiled in this pattern, sugar phosphate backbone.
Base pairs?
Pairs of peptides that make up rings of the ladder.
A:T
Adenine and thymine - always paired together in DNA
