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Biology & Geology

Chapter 1 - Support and Movement in Living Organisms

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Chapter 2 - Hormonal Coordination in Living Organisms

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Chapter 3 - Reproduction in Living Organisms

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Chapter 4 - Immunity in Living Organisms

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Chapter 5 - Molecular Biology - DNA Structure and Function

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Chapter 6 - Molecular Biology - RNA, Protein Synthesis and Genetic Engineering

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Chapter 7 - Geology, Earth Sciences and Ecology

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Quiz

Lesson 2: Adrenal Glands, The Pancreas and Reproductive Gonads — Lesson quiz

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  • Questions count: 5
  • Passing grade: 60%
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1.
Aldosterone directly maintains electrolyte homeostasis by promoting:
Glucose excretion in urine
Water loss through sweat glands
Sodium reabsorption and potassium excretion in kidney tubules
Calcium absorption in the duodenum
2.
Which of the following cellular changes occurs directly when a wilted plant shoot is irrigated with fresh water?
Lignin is immediately deposited inside the xylem vessel walls.
Water enters the vacuole via osmosis, expanding turgor pressure against the cell wall.
Cell sap osmotic pressure increases and cell wall shrinks inward.
Cuticle thickness over leaf epidermis doubles within minutes.
3.
During maximal skeletal muscle contraction according to Huxley's sliding filament model, which region experiences NO change in its absolute length?
The I-band (light isotropic zone)
The A-band (dark anisotropic zone)
The distance between two successive Z-lines
The H-zone (central semi-light region)
4.
What is the biochemical cause of continuous, non-relaxing muscle spasm that can cause muscular tearing?
Complete depletion of cellular ATP molecules, preventing cross-bridge detachment.
Sudden accumulation of glucose inside glycogen granules.
Excessive breakdown of acetylcholine by the enzyme acetylcholinesterase.
Abrupt accumulation of excessive calcium ions in the synaptic cleft.
5.
How many cervical vertebrae are present in the adult human vertebral column?
4 vertebrae
5 vertebrae
7 vertebrae
12 vertebrae
  • 1
  • 2
  • 3
  • 4
  • 5