Sunday, April 14, 2024

Experiment: How Fast Your Brain Reacts To Stimuli

https://backyardbrains.com/experiments/reactiontime  

How fast do you think you are? Do you know what a reflex and a reaction are? This lesson plan tells all about the quickness of your nervous system and the muscular system, which the nervous system innervates.

https://backyardbrains.com/products/ReactionTimer

The frontal lobe

 The frontal lobe is generally where higher executive functions including emotional regulation, planning, reasoning and problem solving occur. This is why in frontotemporal dementia, personality changes are often the first signs of the disease

Nervous system

 The nervous system is a remarkable network of nerves and cells that orchestrates and regulates all bodily functions. 


Cell Membrane Transport - Transport Across A Membrane - How Do Things Mo...

The membrane potential

 https://www.khanacademy.org/science/biology/human-biology/neuron-nervous-system/a/the-membrane-potential




OR Khan Academy has pages that are helpful if you prefer text see

https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/facilitated-diffusion/a/diffusion-and-passive-transport


Guiding questions for each lecture

You can use these questions to review your lectures and check if you caught everything/understood everything discussed in lecture or your pre-class material.


Lecture 1 guiding questions

At a high level (big picture), can you answer the following?

What makes up the nervous system? (what cells)?

What are the two major anatomical divisions of the nervous system?

What are the divisions of the peripheral nervous system?

How do neurons communicate?

 


Lecture 2 guiding questions

Describe several ways that intracellular fluid (ICF) differs from extracellular fluid (ECF). What ions are higher in the ICF vs ECF?

Describe what a concentration gradient is and how it leads to diffusion and the establishment of a dynamic equilibrium.

Can you identify the flow of ions in/out of cells based on concentration gradients?

Describe the mechanism of the Na+/K+ pump and explain how it contributes to the resting membrane potential of a cell.

What would happen to the resting membrane potential if the Na+/K+ pump was mutated and not working?

Describe the mechanism of Na+ and K+ leak channels. How do they contribute to the resting membrane potential of a cell? How do they contribute to membrane permeability?

What is the resting membrane potential? What voltage value is it typically for most cells in your body?

 

Resting membrane potential - definition, examples

Resting Membrane Potential | Nervous System

Electrochemical Gradient

Nervous System

Saturday, April 13, 2024

spoiler alert


each part of each class 

why second collapse 

why doing cpr immediately 

why the collision cause cardiac arrest 

why has the heart stop 

very very unusually

Free think why this one happen

Ganglia

 peripheral nervous system

The Anatomy of the Ganglia. "Ganglia" is the plural of the word "ganglion."

 Ganglia are clusters of nerve cell bodies found throughout the body. 

They are part of the peripheral nervous system (PNS) and carry nerve signals to and from the central nervous system (CNS).

enteric system

 to consider the enteric system to be a part of the autonomic system because the neural structures that make up the enteric system are a component of the autonomic output that regulates digestion.

Ganglia

 Ganglia are 20,000 to 30,000 afferent and efferent nerve cell bodies that run along on either side of the spinal cord. 

Central nervous system

 The nervous system includes the brain, and the spinal cord.

Central nervous system 

  • Brain 
  • spinal cord

Peripheral nervous system

  • as ganglia and
  •  nerves.
A glial cell is one of a variety of cells that provide a framework of tissue that supports the neurons and their activities.

Neurons are cells and therefore have a soma, or cell body, but they also have extensions of the cell; each extension is generally referred to as a process.
Myelin is a fatty substance that surrounds and insulates axons (or nerve fibers) much as insulation does an electrical wire. 

Friday, April 12, 2024

cell transport

 cell membrane 

genetic material cytoplasm, ribosome, eukaryotes , prokaryotes. 


help regulate homeostasis

cell membrane - signaling ablities 

phospholipid bilayer 

polar 

and non polar 

directly go through bilayer 

oxygen . carbondioxide simple diffusion move with the flow 

molecules move from high concentration to low contration of moleculels 

protein to the membrane 

transport protein 

change the shape 

stimulus 

helping with the molecules if the molecules is too big help to break down or reduce size 

protein facilitating 

glucose - 

osmosis 

transport active transport and passive transport

glucose - concentration of glucose in the cell 

the concentration of glucose in the environment

ATP energy ( 3 phosphate ) 

ATP force the molecule to the ( limit size ) reshape the size 

carbohydrate : 

   endocytosis ( inside the cell ) depending on how the cell bringing the molecule inside the cell 

bind the receptor - 

different type of endocytosiss 

exocytosis _ cell waste 

polysaccharide-

cell wall are different cell membrane

cell wall -need carbohydrate 

 


April 12 2024 -1st day of class