Zadanie 5a
State the missing entries P, Q and R in this summary of human endocrine signalling.
- Tabela do uzupełnienia
ADH control of collecting-duct water recovery
Connect osmotic sensing to hormone release, aquaporin redistribution and changes in water reabsorption.
Tę umiejętność sprawdza 17 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 17 Otwórz w wyszukiwarce z filtrami
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 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…
Zadanie 6
(a) Outline how evaporation of sweat cools the body. (b) Describe the kidney’s response when body water is depleted. (c) Explain the movement of water from soil, through a flowering plant and into the air.
Zadanie 24
The hypothalamus contributes to coordination within the body. Outline two regulatory functions of the hypothalamus.
Zadanie 39
Blood becomes more concentrated than its normal range and ADH secretion increases. Which renal response helps restore water balance? A. The collecting ducts become completely impermeable to water B. All glomerular filtration stops permanently C. The kidney…
Zadanie 8
(a) Describe how auxin produces a shoot’s directional growth response to light. (b) Outline feedback interactions among hormones controlling ovarian and uterine cycles. (c) Explain how the loop of Henle and ADH influence urine concentration.
Zadanie 2d
A model sample contains 24 mg urea per 100 mL of plasma but 1440 mg per 100 mL of final urine. Explain how the kidney produces this concentration increase.
Zadanie 6
(a) Outline the role of ADH in maintaining water balance. (b) Explain how an end product can regulate the pathway that makes it. (c) Describe hormonal feedback involved in preparation for pregnancy, maintenance of pregnancy and childbirth.
Zadanie 39
Which adaptation can help a small desert mammal conserve water? A. A long loop of Henle supporting a strong medullary osmotic gradient B. A collecting duct permanently impermeable to water C. Loss of all ADH secretion during dehydration D. Sweating at a higher…
Zadanie 23a
State the relationship between the two measured variables.
- Materiał graficzny
Zadanie 23c
State what makes the ADH-releasing part of the pituitary an endocrine gland.
- Materiał graficzny
Zadanie 23a
State the relationship between the two measured variables.
- Materiał graficzny
Zadanie 23c
State what makes the ADH-releasing part of the pituitary an endocrine gland.
- Materiał graficzny
Zadanie 6
Water has physiological roles in both plants and mammals. (a) Outline how water’s properties allow evaporation to cool an animal. (b) Describe how weather affects the movement and loss of water in a terrestrial plant. (c) Explain how a dehydrated mammal…
Zadanie 8
Membrane transport and kidney function contribute to water and solute balance. (a) Outline four different ways substances cross the plasma membrane, giving an example for each. (b) Explain how kidney regions contribute to water balance and excretion of…
Zadanie 5c
Explain the role of ADH in osmoregulation.
- Materiał graficzny