18 Questions
What is one of the key functions of the nervous system mentioned in the text?
Activating muscles and glands
How do cells in the nervous system primarily communicate?
Through chemical signals
What is the function of sensory input within the nervous system?
Gathering information from sensory receptors
Which statement accurately describes the role of integration in the nervous system?
It interprets sensory inputs and makes decisions on actions
How does the nervous system contribute to higher mental functioning as per the text?
By interpreting sensory inputs and integrating them
What is a critical feature of the nervous system's role in maintaining body homeostasis?
Providing rapid and specific responses with electrical signals
What is responsible for balancing the high concentration of positive sodium ions in the extracellular fluid outside the cell?
Negative chloride ions
How do ions cross cell membranes?
Via ion channels
What determines the permeability of a cell to a particular ion?
The size of the ion channel
What type of cells are very permeable to potassium and slightly permeable to sodium?
Excitable cells
Why are cells impermeable to negatively charged proteins and other large anions found inside them?
These anions are too large to pass through the cell membrane
What effect does increasing the number of channels for a particular ion have on a cell's permeability?
Increases permeability
Which part of the nervous system is responsible for interpretation of sensory input and dictation of motor responses?
Central Nervous System
What is the main function of Neuroglia or Glial cells in the nervous system?
Segregate and insulate neurons
What distinguishes Neuroglia cells from neurons in the nervous system?
Cell size
Which type of cells outnumber neurons in the nervous system?
Oligodendrocytes
What do satellite cells and Schwann cells primarily belong to?
Peripheral Nervous System
Which type of cells provide a supportive scaffolding for neurons in the nervous system?
Astrocytes
Explore the fundamentals of the nervous system in human physiology, covering its role in maintaining body homeostasis, providing sensation and higher mental functioning, and activating muscles and glands. Learn about the master controlling and communicating system of the body and how its cells communicate through electrical and chemical signals.
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