potiental exam questiosn Flashcards
describe how xylem assists in water trasnport in the sunflower of a plant
water moves up the xylem vessels by cohension between water molecules and adhesion between water molecules and the sides of the xylem walls which allows water to move up the xylem via capillaryaction
Outline how urine leaves the body after being produced in the kidneys.
Describe the process that occurs within the nephrons of the kidneys to produce urine from blood arriving from the renal artery.
.
for people with diabetets, their pancreas fails to produce insulin or their cells irreposnive to insulin. Why?
these outcpomes are the result of te failure of a sensor and their cells to become irresponsive to insulin
Explain how the cells of the small intestine are specialised to aid digestion.
Cells of the small intestine are specialised to aid digestion as they are arranged into villi and have microvilli on their surface.
The villi and microvilli greatly increase the surface area of the small intestine, allowing for greater absorption of organic molecules along the digestive tract
diabetes rsults in bodys failure to achieve homeostasis. define homesatsis with specific reference to this disease
homestasis in regards to diaetes refers to the maintance of blood gluose levels within a narrow range for optimal function
diabetes rsults in bodys failure to achieve homeostasis. define homesatsis with specific reference to this disease
homestasis in regards to diaetes refers to the maintance of blood gluose levels within a narrow range for optimal function
with reference to the glomerlus, explain how kidney damage may lead to microalbumrinina
high blood pressure meanst hat blood is filtered through the glomeularus with great force which could cause small tears in the capillaries comprising the glomeuleurus and damaging it.
possible symtpom of kindey damage
changes in urine volume
besides the glomeulrus, what other parts of the nephron may result in microalbumrinia
proximal convulated tubule
how may the malfunctiioning of the glomeulerus result in microablurminia
how may the malfunctiioning of the glomeulerus result in microablurminia
how does hyperthyrdoisim result in weightloss
hyperthyrdoism results in an overporuction of hydroid hromoens wich regulate body systems. An excessive amount of these hormones can increase metabolic rates in the body resulting in weight loss
why would a leaf be rolled
drought and high temeprature
why on a hot windy day do plants lose a lot of water
one exmaple of an effector is the smooth msucle in peripheral blood vessels
explain how this effector brings a decrease in body temperature
the smooth muslce tissue within te perihpal blood vessels releases,allowing vessels to dilate. This increasesthe volume of blood close to the surface of the skin, leading to heat loss.
