Plants have developed responses called tropisms. A tropism is a growth in response to a stimulus; so light and water in the plant’s case. There are different types of tropisms: Positive tropisms are when growth is towards the stimulus -...

In this video, we discuss:<br/>
[1] the small intestin<br/>e's anatomy
[2] the transit of chyme from the stomach <br/>to the small intestine
[3] the hormones released by the small intestine in response to chyme entry

When can an axon be restimulated to produce an action potential? After the Absolute Refractory Period has finished. It's possible to cause another action potential during the relative refractory period, but it takes a stronger stimulus....

Depolarization, repolarization, hyperpolarization - It's all here. Watch this for a review of the action potential.

How does the signal that starts at the axon hillock travel down the axon, and why does it only go in one direction?

In this video, I respond to a question that was posted by Akbar on my blog. He asks about the difference between the inactive and closed states of v-gated sodium channels. I illustrate the difference using a box. Enjoy!

What does it take for an action potential to take place? What are depolarization, repolarization, and hyperpolarization? How are voltage-gated ion channels involved? In this video, you will get answers to all these questions.

In this video, we will discuss the anatomy and function of the withdrawal reflex.

Have you noticed that plants tend to grow in the direction of the sun? This redirection towards the sun a form of tropism, or plant movement. Learn about the common types of plant movement and their benefits!

The video discusses a practical biology experiment that investigates the factors affecting human reaction time. The setup involves a subject seated with their weaker arm hanging over the edge of a table while their partner holds a meter...

The video provides an explanation of the nervous system, its components, and how they work together. The video explains how a stimulus is detected, converted into an electrical impulse, and travels along a sensory neuron to the CNS,...

Students will learn the three main types of neurons and how they travel through the body's nerve network. Diagrams explain how information is received using our sensory organs and then processed by the central and peripheral nervous...

The nugget describes common plant movements. (phototropism, geotropism, chemotropism, hydrotropism, thigmotropism, thigmonasty).

This video explores different types of synesthesia, such as seeing sounds, tasting words, and associating colors with numbers. It highlights the historical background, prevalence, and various tests used to identify this unique ability.

Negative feedback sounds like a bad thing, right? Well actually it’s not bad at all. In fact it’s a very important process that occurs in our bodies all the time. But what does it actually do? What does negative feedback mean?

This video is an educational lesson on reflex arcs within the nervous system. The narrator explains what reflex arcs are and how they work. Through the example of touching a hot pan, the video demonstrates the different stages of a...

KINE 3135 Biomechanics of Skeletal Muscles

Our bodies have a system in place which enables us to react really quickly, called reflex reactions. Reflex reactions are immediate, unconscious responses to a stimulus that provides us with protection and aids survival. When your safety...

Students will learn why photosynthesis is so important to us. The different plant structures and compounds involved in photosynthesis and transpiration are highlighted. Beyond photosynthesis, plant responses to certain stimuli and...

There are 3 different types of neuron, or nerve cell; the sensory neuron which detects the signal, the relay or intermediate neuron, and the motor neurons which trigger the response. We will also look at how synapses work; transmitting...

This video explains the concept of classical conditioning, using Ivan Pavlov's famous experiment with dogs as an example. It also explores how the brain processes and forms associations between stimuli and responses, and includes a...

A longtime professor at Tufts University, his groundbreaking books — The Hurried Child, The Power of Play and Miseducation informed early childhood education professionals of the possible dangers of "pushing down" the elementary...

We've already learned a little bit about plant hormones, but let's dig a little deeper so that we can really examine the different ways that plants can respond to stimuli. These are called tropisms, and they can be positive or negative,...

This video explains the concept of adaptations in animals, focusing on both physical characteristics and behavioral traits. The video also introduces the idea of stimuli and responses, emphasizing how animals react to changes in their...