Ch. 1-Introduction Flashcards
What is negative feedback loop? Examples?
It reverses altered condition caused by stimulus and returns body back to homeostasis. (ex: BP, body temp, blood pH, Calcium levels)
What is a positive feedback loop? Examples?
It reinforces altered condition that doesn’t occur often and terminates. (ex: labour, blood clotting, ovulation)
3 components of feedback loop
receptor, control center, effector
What is homeostasis?
Condition of equilibrium/balance in body’s internal environment, which is maintained by body’s regulatory processes.
What are regional names?
names given to specific regions of the body
What is cephalic?
The head
What is cervical?
The neck
Midsagittal plane?
Down the middle
Frontal plane?
Vertical plane dividing front and back of body
Transverse plane?
Horizontal plane across the body
What are body cavities?
The spaces between our body that protects, separates, and supports our internal organs
What does the cranial and vertebral cavity contain?
The Brain and spinal cord
What does the thoracic cavity contain?
The pleural, pericardial, and mediastinum cavities
What is the pericardial cavity?
The space between the visceral and parietal layers of the pericardium which covers the heart
What is the mediastinum?
The middle/central section of the thoracic cavity, between the two pleural cavities
What does the abdominal cavity contain?
liver, stomach, spleen, gall bladder, most of the large intestine, and small intestine
What does the pelvic cavity contain?
the rest of the large intestine, urinary bladder, and organs of reproduction
Describe the serous membranes.
thin and double-layered
What do serous membranes do?
Cover organs within the thoracic and abdominal cavities and reduces friction.
What is the pleura?
Serous membranes that cover the lungs
What membrane covers some abdominal organs?
Peritoneum
What are organs that are not surrounded by the peritoneum called?
Retroperitoneal
