All Under Control Flashcards
What is respiration?
The process that releases the energy stored in glucose and converts it to a useable form.
Respiration equation
Glucose + oxygen > carbon dioxide + water + energy
What is the role of the respiratory and circulatory systems?
Supply materials to cells and tissues to then carry out respiration as well as removing wastes.
How does the respiratory and circulatory systems supply cells with oxygen?
Air enters the respiratory system and into the alveoli. This air then diffuses across the alveolar walls into the bloodstream. Oxygen diffuses from the blood into the interstitial fluid and from there into the cells.
What is carried in the bloodstream to the cells regarding nutrients?
Glucose, amino acids, fatty acids, vitamins and minerals.
How does the excretory system get rid of waste?
The liver processes the nitrogenous waste and converts it into urea. The urea then travels through the bloodstream and once it reaches the kidneys, it is filtered out of the blood.
What do enzymes do?
Help regulate chemical reactions in the body
What is homeostasis?
The maintenance of constant internal conditions within the body despite fluctuations in the external environment.
What conditions have to stay at constant levels?
Temperature pH Blood sugar Salt Water
What is negative feedback?
When the body detects a change in conditions and then responds and reduces the change back to optimal conditions.
CNS
Spinal chord and brain
PNS
Nerves connecting the body to the CNS
What do neurons do?
Transmit electrical messages in one direction.
Motor neurons
Carry electrical impulses from CNS to muscles and glands.
Sensory neurons
Carry electrical impulses from receptors in the sense organ to the CNS.
