homeostasis

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1: What are most control mechanisms in living organisms maintained by?: positive feedback
negative feedback
both
constructive feedback
2: Which gland secretes glucagon and insulin?
3: Where two neurones meet a small gap is found betwwen them. What is it called?
4: Which plant growth regulator stimulates the production of amylase in dormant seeds?
5: What name is given to a sensor that picks up information about a parameter being regulated in the body?
6: Which gland contains cells which act as osmoreceptors?
7: In mammals glucose is stored as a polysaccharide called...
8: What process turns waste amino acids into urea?
9: Define homeostasis
10: Looking at the diagram below, where is the cortex?: A
B
C
D
E
11: In the above diagram where would you find the renal capsules?: A
B
C
D
E
12: A rise in blood glucose levels causes which cells in the pancreas to secrete insulin?
13: If a person inhales air with a high carbon dioxide content they start to breathe at a faster rate, this is an example of: positive feedback mechanism
negative feedback mechanism
constructive feedback mechanism
respiratory increase
ventilation feedback
14: In the diagram below, where is most glucose reabsorbed? ?: 3
4
5
6
7
15: In which area is ultrafiltration taking place?: 1
2
3
4
5
16: Which plant growth regulator stimulates stomata to close? (full name needed)
17: Look at the image below. What is it?: urea
urine
glucose
amino acid
fatty acid
18: Where does the blood in capillaries surrounding the proximal convoluted tubules come from?
19: True or false, ADH makes the walls of the collecting tubules more permeable to water?
20: What molecule is this?: urine
urea
amino acid
fatty acid
nitric acid
21: Is the water potential in the blood plasma in the glomerulus higher or lower than that of the liquid in the renal capsule?
22: Write a definition for excretion
23: What form of diabetes usually begins very early on in life?
24: What form of diabetes is often associated with obesity?
25: Where is urea produced?: kidney
liver
gall bladder
china
brain
26: During deamination ammonia is instantly converted into which product?: urine
uric acid
urea
creatine
insulin
ammonium
glucagon