Reproductive System, Urinary System, Dilution Flashcards
What is concentration?
The concentration of a solution is the ratio of the amount of solute to the total quantity of solution. A solution’s concentration is not always the same.
Concentrated vs Diluted Solution
A concentrated solution contains a large amount of dissolved solute in relation to the volume of the solution. A diluted solution contains a small amount of dissolved solute in relation to the volume of the solution.
Formula for Concentration
c = m / v
How do you express concentration as a percentage?
The concentration of a solution is often expressed as a percentage. This percentage gives shows the amount of solute per 100 mL of solution. To express concentration as a percentage, use the general concentration formula, multiplying by 100. In this formula, be careful to use grams for mass and mL for volume as your units.
How do you dilute a solution?
As a solution becomes more diluted, the solvent/solute ratio increases. Therefore, in order to dilute a solution, one must add solvent to the original solution to reduce its concentration.
Wastes produced by the body.
Our bodies produce several kinds of wastes, including sweat, carbon dioxide gas, feces, and urine.
How is waste excreted by the body?
Wastes exit the body in different ways: Sweat is released through pores (tiny holes) in the skin. Water vapour and carbon dioxide are exhaled (breathed out) from the lungs. And undigested food materials are formed into feces in the intestines and excreted from the body as solid waste in bowel movements
What is the function of the urinary system?
The main function of our urinary system is to filter blood to remove waste and excess substances such as water and minerals. The urinary system also eliminates this waste, a process called urination.
Kidneys! How do they work?
The kidneys filter blood through millions of nephrons, which are small filtration units. The kidneys receive blood from the renal artery, which is connected through capillaries surrounding the nephrons. As blood circulates in the capillaries, the nephrons filter it by removing excess substances through the process of diffusion.
All about urine:
The composition of urine varies from one person to the next and fro one time of the day to another. Urine is made mostly of water but also contains waste products such as: urea, uric acid, potassium, sodium and urochrome. Urochrome gives urine its yellow colour and it comes from the destruction of hemoglobin present in old red blood cells. Urine can also contain glucose and proteins but this could indicate a health problem such as diabetes.
All about ureters:
They are tubes connecting the kidneys to the bladder and they carry urine to the bladder.
All about the bladder:
The bladder is a stretchy bag made of muscles and it stores urine before it is expelled. A sphincter (circular muscle) located at the bottom of the bladder contracts to stop the flow of urine and relaxes to expel it.
What is the urethra?
The urethra is a tube which urine from the bladder to outside the body.
What is homeostasis?
Homeostasis is the body’s ability to maintain balance (mineral salts in blood, blood pH, water, temperature, etc.).
What is an erection? Explain the process:
NOT ACTUALLY IMPORTANT. S k i p .
During sexual stimulation, the arteries dilate and the penis becomes erect as the spongy tissues fill with blood. In addition, the arteries filled with blood compress the veins and prevent blood from leaving the penis. Since blood is flowing into the penis faster than it is leaving, the penis lengthens, swells and hardens. This swelling allows the penis to get closer to the cervix to release the sperm necessary for fertilization.