Organisation：練習問題

Which part of a typical cell controls the passage of substances such as glucose and mineral ions into and out of the cell?

The table shows data for three different cubes representing organisms. Based on the surface area to volume ratio, which cube would have the most difficulty exchanging materials via simple diffusion across its surface?

Cube A: Side length \( 1 cm \), Ratio \( 6:1 \)
Cube B: Side length \( 2 cm \), Ratio \( 3:1 \)
Cube C: Side length \( 3 cm \), Ratio \( 2:1 \)

If a human red blood cell is placed in distilled water (pure water), it will eventually burst. What is the most likely reason for this occurring?

Which level of biological organisation is represented by a group of organs, such as the stomach, liver, and small intestine, working together to perform a specific function?

Root hair cells take up nitrate ions from the soil. Which process is used to move these ions into the cell when the concentration in the soil is much lower than the concentration inside the cell?

According to the principles of organisation, define the term tissue.

Explain two key differences between active transport and diffusion in terms of the concentration gradient and energy requirements.

A plant cell is placed in a very concentrated salt solution. Explain why the cell becomes plasmolysed, using the concept of osmosis and the movement of \( \text{H}_2\text{O} \).

The human stomach is a complex organ that plays a vital role in the digestive system.
a) Define the term organ in the context of biological organisation.
b) The stomach contains several types of tissues. Describe the function of the muscular tissue and the glandular tissue within the stomach.

The stomach is an organ that performs vital roles in the human digestive system. It is composed of different types of animal tissues that work in coordination to digest food.

a) Identify the three main types of animal tissues found in the stomach.
b) Describe the specific function of muscular tissue within the stomach and explain how it aids the digestive process.
c) Explain the role of glandular tissue in the stomach. In your answer, mention two substances it produces and their importance for digestion.