Biology Unit 5 Btec National Applied
Science Questions And Answers With
Verified Solutions Latest Updated 2024
What is urinalysis? - ANSWER✔✔Measure the products excreted from the body
via urine and can be used to detect many different diseases and chemical
substances in the body.
Through what method is the water leaving your body? (these are uncontrolled
factors) - ANSWER✔✔-sweating
-illness
-exhalation
-too much of salt
what is the thing that monitors the level of water in blood? - ANSWER✔✔-the
volume of water in the blood is monitored by hypothalamus in the brain
why ion's level should kept in control? - ANSWER✔✔-ion level present in the
blood should be kept relatively constant to control osmosis and diffusion between
the cells and in the body
what is urea? - ANSWER✔✔A chemical that comes from the breakdown of
proteins and that would form an excess of amino acids which can't be stored in the
body
what is a deamination? - ANSWER✔✔this takes place in the liver, amino acids go
through this process called deamination and the waste product would be ammonia.
, what is ammonia? - ANSWER✔✔ammonia is a highly toxic chemical that is then
converted into a less harmful product which is urea and that chemical has to be
excreted from our body.
what is the difference between urine and urea? - ANSWER✔✔Urea is broken
down by excess amino acids.
Urine contains urea and excess water.
why urea have to be removed from our body? - ANSWER✔✔urea needs to be
removed from our body, this is because if there's too much urea present in our
bloodstream, then it can damage our cells and tissues
talk about the kidney structure? - ANSWER✔✔the kidney are surrounded by a
capsule that protects the fragile structure underneath.
what is a nephron? - ANSWER✔✔nephrons are tiny things that extend from the
cortex to the medulla and they are important for ultrafiltration, selective
reabsorption and urine formation.
how is the nephron adapted? - ANSWER✔✔the renal tubule of each nephron is
lined with microvilli to increase the surface area
What is ultrafiltration? - ANSWER✔✔ultrafiltration happens in the glomerular
capsule (Bowman's capsule)
everything except large proteins, red blood cells and most of the white blood cell is
forced out of the blood into the glomerular capsule
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