Simple IB Biology

By Amirali Ghajari

As an IB biology HL student, I decided to record a podcast for biology in order to record myself first and understand better, then upload this so everyone else who would like to understand biology in ... more

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FAQs about Simple IB Biology:

How many episodes does Simple IB Biology have?

The podcast currently has 11 episodes available.

Simple IB Biology episodes:

November 12, 2023#1.5 Cell theory - The origin of cells
In this sub-unit of IB biology, we are going to explain the shortest part of unit 1, we are going to understand the concepts of:
Cells can only be formed by division of pre-existing cells

The first cells must have arisen from non-living material

The origin of eukaryotic cells can be explained by the endosymbiotic theory
...more
5min
November 02, 2023#1.4 Cell Theory - Membrane Transport
In today's podcast we are going to explore and understand the concepts of:
Particles move across membranes by simple diffusion, facilitated diffusion, osmosis and active transport

The fluidity of membranes allows materials to be taken into cells by endocytosis or released by exocytosis

Vesicles move materials within cells
...more
13min
October 24, 2023#1.3 Cell Theory - Membrane Structure
In this sub-unit we are going to explore the concepts and understanding of:
Understandings:
Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules

Membrane proteins are diverse in terms of structure, position in the membrane and function

Cholesterol is a component of animal cell membranes
...more
9min
October 19, 2023#1.2 Cell Biology - Ultrastructure of cells
In this second part of unit 1 of the IB biology, we will explore the concepts of:
Prokaryotes have a simple cell structure without compartmentalization

Eukaryotes have a compartmentalized cell structure

Electron microscopes have a much higher resolution than light microscopes
...more
11min
October 19, 2023#1.1 Cell Biology - Introduction to cell theory
Welcome everyone in the first episode of this podcast we are going to understand the key concepts of the first part of IB biology which are:
According to the cell theory, living organisms are composed of cells

Organisms consisting of only one cell carry out all the functions of life in that cell

Surface area to volume ratio is important in the limitation of cell size

Multicellular organisms have properties that emerge from the interaction of their cellular components

Specialized tissues can develop by cell differentiation in multicellular organisms
...more
10min
October 16, 2023#6.6 Human Physiology - Hormones, Homeostasis, and Reproduction
In the last sub-unit of unit 6 we are going to explore the content of:
Insulin and glucagon are secreted by β and α cells of the pancreas respectively to control blood glucose concentration

Thyroxin is secreted by the thyroid gland to regulate the metabolic rate and help control body temperature

Leptin is secreted by cells in adipose tissue and act on the hypothalamus of the brain to inhibit appetite

Melatonin is secreted by the pineal gland to control circadian rhythms

A gene on the Y chromosome causes embryonic gonads to develop as testes and secrete testosterone
...more
25min
October 14, 2023#6.5 Human Physiology - Neurons and Synapses
In this sub-unit of unit 6, we are ging to synthesize and explain the contents such as:
Neurons transmit electrical impulses

The myelination of nerve fibers allows for saltatory conduction

Neurons pump sodium and potassium ions across their membranes to generate a resting potential

An action potential consists of depolarization and repolarization of the neuron

Nerve impulses are action potentials propagated along the axons of neurons
...more
20min
October 13, 2023#6.4 Human Physiology - Gas Exchange
In this sub-unit we are going to explore the contents of:
Understandings:
Ventilation maintains concentration gradients of oxygen and carbon dioxide between air in alveoli and blood flowing in adjacent capillaries

Air is carried to the lungs in the trachea and bronchi and then to the alveoli in bronchioles

Type I pneumocytes are extremely thin alveolar cells that are adapted to carry out gas exchange

Type II pneumocytes secrete a solution containing surfactant that creates a moist surface inside the alveoli to prevent the sides of the alveolus adhering to each other by reducing surface tension
...more
18min
October 13, 2023#6.3 Human Physiology - Immune defense
In this sub-unit we are going to explore contents of:
The skin and mucous membranes form a primary defence against pathogens that cause infectious disease

Cuts in the skin are sealed by blood clotting

Clotting factors are released from platelets

The cascade results in the rapid conversion of fibrinogen to fibrin by thrombin
...more
16min
October 12, 2023#6.2 Human Physiology - Blood System
In this sub-unit of human physiology we will explore contents of:
Arteries convey blood at high pressure from the ventricles to the tissues of the body

Arteries have muscle cells and elastic fibres in their walls

The muscle and elastic fibres assist in maintaining blood pressure between pump cycles

Blood flows through tissues in capillaries

Capillaries have permeable walls that allow exchange of material between cells in the tissue and the blood in the capillary

Veins collect blood at low pressure from the tissues of the body and return it to the atria of the heart

Valves in veins and the heart ensure circulation of blood by preventing backflow
...more
22min

FAQs about Simple IB Biology:

How many episodes does Simple IB Biology have?

The podcast currently has 11 episodes available.