CH NEURAL CONTROL AND COORDINATION Flashcards
(65 cards)
What is coordination
The process via which two or more organs interact or complement each other is k/a Coordination
Which system jointly coordinates and integrates all of the organs of the body so that they work in a synchronised fashion
The neural system and endocrine system
The human neural system consists of
- The CNS
- PNS
What is a nerve
Nerve is a collection of Nerve fiber
How many Nerve are present in Spinal and Cranial Nerve
There are 31 pairs of Spinal Nerve and 12 Pair of Cranial Nerve
The part of the PNS that controls Voluntary action is k/a
Somatic Nervous System
The part of the PNS that controls Involuntary action is k/a
Autonomic/ Visceral System
The sympathetic and Parasympathetic Nervous system have _____ effect on the organ
Antagonistic or opposite effect
How many neurons are present in the human brain
more than 100 billion neurons are present in the brain
Bipolar Neuron is present in
Retina of eye, olfactory epithelium
Unipolar neuron is present in
Embryonic stage
Pseudounipolar neuron is present in
Neurons of Dorsal root ganglion of spinal cord
The nissils granules are made up of
RER
for active transportation across the membrane, we use
PUMPS
for passive transportation across the membrane we use
CHANNELS
What is impulse in a neuron
The flow of positive charge towards negative charge in a neuron is k/a Impulse
What is polarization
When opposite charges are present across the membrane it is polarized. The neuron i said to be in resting state
In neurons, the resting membrane potential ranges from _____ to ______. A typical value is _____.
It ranges from -40 to -90 mV. A typical value is -70mV
What is resting membrane potential
The potential of the membrane in resting state i.e polarized state is k/a Resting membrane potential
what is the approximate value of Hyperpolarization, When does it occur
-85 mV, It occurs when there is more polarization that required
How does Na+ K+ pump work
Na+/K+ PUMP helps in transportation of 3Na+ outwards and 2 K+ Inwards at the cost of 1 ATP
What happens when Neurons receive a threshold potential
When the neurons reach threshold potential which is about -55mV, this causes the Na+ Voltage gated channels to open which results in rapid influx of Na+ and thus there is depolarization (Excitatory state) of the membrane
What is the value of action potential/ Nerve impulse
+40mV
What are the different steps during transmission of impulse
- Membrane is polarized or under resting state.
- A threshold stimulus is provided that cause Depolarization of the membrane i.e. it goes under excitatory state
- Once it reaches the action potential, the Na+ VGC close and K+VGC open and the membrane starts to repolarize
- The membrane is repolarized so much so that it reaches Hyperpolarized state
- Then with the help of Na+/K+ pump the membrane is brought back to polarized/ resting state
