Zadanie 5a
State the missing entries P, Q and R in this summary of human endocrine signalling.
- Tabela do uzupełnienia
Homeostasis
Umiejętności w tym dziale
Umiejętności z tego działu sprawdza 47 zadań wzorowanych na arkuszach IB z lat 2022–2026. Dział pojawia się w 33 z 54 arkuszy w bazie.
Zadania z tego działu: 47 Otwórz w wyszukiwarce z filtrami
Zadanie 5b
After several hours without food, a person’s blood glucose begins to fall. Explain how glucagon contributes to restoring the regulated concentration.
Zadanie 9
Glucose connects molecular structure, energy release and physiological regulation. (a) Distinguish alpha-glucose and beta-glucose in structure and biological role. (b) Explain the regulation that prevents large sustained changes in human blood glucose…
Zadanie 31
A person becomes too warm during light exercise. Which coordinated response tends to restore normal core temperature? A. Less sweating, narrower skin arterioles and greater brown-fat heat production B. More sweating, narrower skin arterioles and greater…
Zadanie 31
Which renal mechanism helps conserve water when the body needs to produce concentrated urine? A. Active pumping of water molecules through aquaporins B. Removal of all solutes from the medulla C. Suppression of every nephron’s filtration for an entire day D.…
Zadanie 32
The graph follows glucose in the filtrate of a healthy nephron. Which process best explains the decrease along the proximal convoluted tubule? A. Glucose is transported from the filtrate and returned to the circulation B. Water enters the filtrate…
- Materiał graficzny
Zadanie 32
The diagram shows a change in skin arterioles following a change in environmental temperature. Which response is likely to accompany it? A. More sweat secreted to the skin surface B. Increased shivering activity in skeletal muscles C. Body hairs lying flatter…
- Materiał graficzny
Zadanie 2b
(i) Explain why the treated cells and control cells show different changes in volume. (ii) Discuss how aquaporins in human collecting ducts help when blood water content becomes too low.
- Materiał graficzny
Zadanie 2a
(i) Outline one physiological response that could lower the runner’s body temperature. (ii) Identify the type of feedback involved and give a reason.
Zadanie 8
Water influences the operation of organisms and the stability of their environments. (a) Outline how cohesion between water molecules benefits organisms. (b) Describe ecological consequences of ice loss and altered ocean circulation. (c) Explain how hormones…