section 2. (4) describe the main changes in the chemical composition of the blood as it moves around the body and identify tissues in which these changes occur Flashcards
1
Q
What are the 4 basic chemical groups which the transport system moves around the body?
A
- gases
- nutrients
- wastes
- hormones
2
Q
How does blood pass through the heart?
A
- deoxygenated blood enters through the right atrium (via vena cava). this blood is high in urea/ nitrogenous wastes and low in glucose/nutrients
- the pulmonary artery carries deoxygenated blood from the heart to lungs
- after being in the lungs, the pulmonary vein carries blood (oxygenated) to the left atrium of the heart
3
Q
What happens to the blood in the lungs?
A
- gains oxygen and loses carbon dioxide
4
Q
Blood leaving muscle tissue…
A
- Has more Carbon dioxide, less oxygen, less glucose and less amino acids
- there is internal gaseous exchange in all organs due to cellular respiration
5
Q
What happens to blood in the liver?
A
- undergoes a deamination of amino acids/ urea is formed
- glucose levels are regulated by the formation of glycogen
- Alcohol, old RBC’s and vitamins are broken down
- blood leaving the liver has less glucose, less amino acids and more urea
6
Q
What happens to blood in the kidneys?
A
- removal of waste products such as urea
- removal of excess salt and water
- reabsorption of amino acids and glucose
- Blood leaving the kidneys has; less urea, less salts and less water.
7
Q
What happens to blood in the intestinal/digestive tract?
A
- nutrients are reabsorbed into the bloodstream
- blood leaving intestines has more glucose, more amino acids, more fatty acids and glycerol, more vitamins and less oxygen
8
Q
What do endocrine glands do?
A
- secrete hormones
- blood leaving endocrine glands has more hormones
9
Q
what does blood do when passing through reproductive organs and bone marrow?
A
- picks up hormones when passing through reproductive organs
- picks up new RBC’s and WBC’s
