Chapter 1 - Intro To A&P Flashcards
- Organism
- System
- Organ
- Tissue
- Cell
- Organelle
- Macromolecules
- Molecules
- Atom
Hierarchy of complexity
What things look like , identified and named
Anatomy
How things look like, identified, and named
Anatomy
Surface, gross, histology, cellular, and monocular
Different levels of Anatomy
How living things function and work
Physiology
Organismal, systematic, cellular, molecular, pathophysiological
Different types/levels of Physiology
The maintenance of balance within the body and between the body and the environment
Homeostasis
A guiding principle in our understanding of Physiology
Homeostasis
accomplished through regulation of physiological variables
Homeostasis
Auto-regulation and Extrinsic regulation
Types of Homeostasis
Intrinsic and occurs within a cell, tissue, or organ.
Auto-regulation
Regulated by one of the 2 major control systems in the body , the nervous system or the endocrine system. Send signals to cells, tissues, or organs via nerves or hormones to change the activity of that cell of tissue.
Extrinsic regulation
Most homeostasis is maintained via ______
Negative Feedback
Negative and Positive
Types of Feedback
Achieved through feedback mechanisms
Homeostasis
- Causes change opposite to the stimulation that was detected by sensory structures. I.e. an increase above desired level triggers mechanisms to decrease the level ,vise versa.
- Maintains a physiological variable within acceptable limits by generating an oscillating pattern around the set point when changes are graphed over time
(UP and DOWN, HIGH and LOWS)
Negative Feedback
- Causes change similar to the stimulus that activated the systems leads to continuous escalation or continuous decrease until the system reaches a crashing point
- See in developmental changes (eg. Ovulation)
- Response to dangerous or stressful situations
Positive Feedback
Energy flows
Gradients
Doesn’t need any added energy to make it happen
Down gradients
Requiring energy input to make it happen
Up gradients
A position used to define directional terms in human anatomy
Anatomical position
Vertical and symmetrical plane, divides the body into right and left section
Sagittal plane
Vertical plane that divides the body into front (anterior) and back (posterior) sections.
Frontal plane
Horizontal plane that divides the body into lower (inferior) and upper (superior) sections
Transverse plane
Towards the front or belly
Ventral
Towards the back or spine
Dorsal
Towards the ventral side (front)
Anterior
Towards the dorsal side (back)
Posterior
Towards the head or superior end
Cephalic
Towards the forehead or nose
Rostral
Towards the tail or inferior end
Caudal
Above
Superior
Below
Inferior
Towards the median plane
Medial
Away from the median plane
Lateral
Closer to the point of attachment or origin
Proximal
Father from the point of attachment or origin
Distal
On the same side of the body
Ipsilateral
On opposite sides of the body
Contralateral
Closer to the body surface
Superficial
Farther from the body surface
Deep
Cephalic (Ventral)
Head