Course MSCI 522_Fall 21 - Principles of Physiology II
Lesson Action Potentials
Student email
Nervous system organization
Arrange the labels to visualize the organization of the nervous system.
Central nervous system Peripheral nervous system
Somatic nervous system Autonomic nervous sys
Which of the following structures make up the CNS and which make up the PNS?
CNS
31 pairs of spinal nerves Brain
,Label the basic structure of the sensory neuron below.
Cell body Sensory nerve endings Nerve ber with myelin
in periphery sheath
Nerve ber with
myelin sheath
Sensory nerve
endings in periphery
Synaptic terminals in
CNS
Peripheral nervous system
Complete this diagram of motor and sensory communication at the spinal cord.
Cell body of motor
neuron
Cell body of
Cell body of Dorsal ganglion
sensory neuron
sensory neuron
Dorsal ganglion
Sensory
information
To brain Sensory
information
To skeletal muscle
, The neural implant acts to replace Ian's motor function to his hand. What is the normal func
They carry signals from the spinal cord to the muscles to produce movement.
They communicate back and forth between the brain and the extremities.
They transmit sensory information to the central nervous system.
Even with the neural implant, Ian has no sensation in his hands. How else might he tell if he
pinching movements with his ngers?
Visually seeing if his hands are moving: other sensory information.
Resting membrane potential
Which of the statements regarding the Na+/K+-ATPase are true and which are false?
True
It creates a concentration It creates a concentration It
gradient for Na+ and K+. gradient for Na+ and K+.
It is active at all times. It is important for maintaining
RMP.
It is important for maintaining
RMP. It is active at all times.
It is only active following an It transports more sodium out
action potential. than potassium in, in each cycle.
It transports more sodium out
than potassium in, in each cycle.