Homeostasis questions

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Homeostasis question collection

Review Homeostasis questions for Biology, with correct answers shown and coverage across nervous coordination; hormonal control; blood glucose regulation.

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Question 1

What is homeostasis?
  1. Regulation of internal conditions to maintain optimum conditions for cells
  2. The release of hormones only during stress
  3. A process that increases body temperature at all times
  4. Control of growth by natural selection

Question 2

Which internal condition is controlled by homeostasis?
  1. Body temperature
  2. Eye colour
  3. Number of chromosomes
  4. Blood group

Question 3

In control systems, what do receptors detect?
  1. Stimuli
  2. Responses only
  3. Hormones only
  4. Enzymes in target cells

Question 4

Which part of the brain regulates body temperature and water balance?
  1. Hypothalamus
  2. Cerebellum
  3. Medulla
  4. Pituitary gland

Question 5

What is the role of insulin?
  1. To lower blood glucose concentration
  2. To raise blood glucose concentration
  3. To break down glycogen to glucose
  4. To increase urine production

Question 6

What is the role of glucagon?
  1. To raise blood glucose concentration
  2. To lower blood glucose concentration
  3. To convert glucose into glycogen
  4. To increase sweating

Question 7

Type 1 diabetes occurs when the pancreas does what?
  1. Produces little or no insulin
  2. Produces too much insulin
  3. Stops producing glucagon only
  4. Cannot digest starch

Question 8

What is type 2 diabetes often linked to?
  1. Reduced response of body cells to insulin
  2. Total absence of glucagon from birth
  3. Inability to produce red blood cells
  4. Lack of ADH release from kidneys

Question 9

How can many cases of Type 2 diabetes risk be reduced?
  1. By regular exercise and a balanced diet
  2. By stopping all carbohydrate intake forever
  3. By taking antibiotics routinely
  4. By avoiding all proteins

Question 10

What happens to skin blood vessels when body temperature is too high?
  1. They dilate to increase heat loss
  2. They constrict to reduce heat loss
  3. They close completely
  4. They carry only deoxygenated blood

Question 11

What happens to skin blood vessels when body temperature is too low?
  1. They constrict to reduce heat loss
  2. They dilate to increase heat loss
  3. They secrete sweat onto skin
  4. They open valves to raise blood glucose

Question 12

Why does sweating help cool the body?
  1. Evaporation transfers energy away from the skin
  2. Sweat absorbs oxygen from air
  3. Sweat blocks blood flow to skin
  4. Sweat produces glucose in epidermal cells

Question 13

Which hormone controls water reabsorption in the kidneys?
  1. ADH
  2. Insulin
  3. Glucagon
  4. Thyroxine

Question 14

If blood water concentration is low, what happens to ADH release?
  1. Increases
  2. Decreases to zero
  3. Stays unchanged always
  4. Switches to insulin release

Question 15

When ADH level is high, what is urine usually like?
  1. Low volume and more concentrated
  2. High volume and very dilute
  3. High glucose and low urea
  4. Completely free of water

Question 16

What is the main function of the kidneys?
  1. To regulate water and ion balance and remove urea
  2. To produce bile for fat digestion
  3. To pump blood to the lungs
  4. To produce red blood cells directly

Question 17

What is urea produced from in the liver?
  1. Excess amino acids
  2. Excess glucose
  3. Excess fatty acids
  4. Excess oxygen

Question 18

In kidney failure, what is dialysis mainly used to do?
  1. Remove waste substances and restore ion and water balance
  2. Increase insulin production
  3. Destroy red blood cells
  4. Make antibodies against pathogens

Question 19

Why can kidney transplants be preferable to long-term dialysis for some patients?
  1. They can restore more normal kidney function and quality of life
  2. They guarantee no need for immunosuppressants
  3. They remove all infection risk permanently
  4. They prevent any chance of organ rejection

Question 20

What is a negative feedback mechanism?
  1. A control response that counteracts a change and returns conditions toward normal
  2. A response that amplifies the original change
  3. A response that occurs only in plants
  4. A response that happens without receptors

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Review Homeostasis questions for Biology, with correct answers shown and coverage across nervous coordination; hormonal control; blood glucose regulation.

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