BIOLOGY LESSON

• Biology
• Secondary Education

BIOLOGY LESSON

_{CELLS, TISSUES AND ORGANS}

TELL WHAT YOU KNOW ABOUT THE ABOVE TOPIC TO YOUR FRIEND

SUBJECT: BIOLOGY

TOPIC: MOVEMENT OF SUBSTANCES INTO AND OUT OF CELLS

LEARNING OUTCOMES

By the end of the lesson, the student will be able to;

1. Describe the relationship between cell, tissue, organ, organ system and organism.

2. List the forms in which cells can exist.   
3. Explain the need for movements of substances across the surface membrane.

ANSWER QUESTIONS

INTRODUCTION

Cells need to exchange substances with their environment to maintain homeostasis, perform metabolic activities, and sustain life.

These exchanges occur across the cell membrane, a selectively permeable barrier that regulates what enters and leaves the cell.

The movement of substances can be broadly categorized into two types: passive transport and active transport.

TYPES OF MOVEMENTS

• PASSIVE MOVEMENTS
• ACTIVE MOVEMENTS

Passive Transport

Diffusion: This is the movement of molecules from an area of higher concentration to an area of lower concentration, driven by the concentration gradient.

Osmosis:

It is specific type of diffusion involving the movement of water molecules through a selectively permeable membrane.
Facilitated Diffusion: This involves the use of transport proteins to move substances across the cell membrane without the use of cellular energy.

Active Transport

Active Transport: This process requires energy, usually in the form of ATP, to move substances against their concentration gradient.

Active transport is crucial for maintaining concentrations of ions and other substances that the cell needs.

Which of the following is an example of passive movement within a cell?

1. Diffusion
2. Muscle contraction
3. Endocytosis
4. Exocytosis

What is the correct relationship between cells, tissues, organs, and organ systems?

1. Cells form organs, organs form tissues, and tissues form organ systems
2. Cells form tissues, tissues form organs, and organs form organ systems

Which of the following is an example of active movement within a cell?

1. Facilitated diffusion
2. Osmosis
3. Muscle contraction
4. Passive transport

What is the role of organs in the body?

1. Organs regulate the body's temperature and produce energy
2. Organs perform specific functions and are composed of different tissues

How do organ systems work together in the human body?

1. Organ systems coordinate and interact to maintain homeostasis
2. Organ systems function independently to carry out specific tasks

The passive movement of cells is as important as the active movement.

Passive movement is essential for equilibrium.

Active movement drives cellular functions effectively.

Both passive and active movements are equally vital.

Active movement outweighs the significance of passive movement.

The relationship between organs and systems is crucial for overall organism function.

Organs and systems work interdependently for survival.

The function of individual organs is paramount.

Organ-system coordination highlights the importance.

The role of systems overshadows individual organs.

Understanding the types of cells is fundamental for comprehending the complexities of organisms.

Cell diversity is the foundation of organisms.

Organism complexities extend beyond cellular understanding.

Types of cells are fundamental, but not all-encompassing.

Understanding cell types is not vital for organism comprehension.

Tissues play a critical role in the functionality of organs.

Tissues are essential for organ structure and function.

Organs can function independently of tissues.

The significance of tissues in organ functionality varies.

Tissues have negligible impact on organ functionality.

The relation between cells and organs is pivotal for overall organism health.

Cell-organ relationship directly impacts organism health.

Organism health is influenced by various factors beyond cells and organs.

The relation between cells and organs is moderately significant.

Cell-organ relation has minimal impact on organism health.

By: B.A.K. AKORLOR