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Human Physiology: Nervous System

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Questions and Answers

What is the primary function of the Central Nervous System?

Central processing, storage, and interface between peripheral and central systems (correct)
Clusters of nerves in the gut, allocation of resources
Control of movement and sensation
Automatic responses and emotional responses

What is the term for the self-regenerating property of nerve signals to prevent signal degradation?

Pulse frequency modulation
All-or-none characteristic
Action potential (correct)
Integrate and fire property

What is the function of the Cerebrum in the brain?

Automatic responses and emotional responses
Memory, planning, and cognitive functions (correct)
Control of vital functions
Coordination of movement

What is the model that describes the ionic conductances and currents involved in the action potential?

Hodgkin-Huxley model (A) Signup and view all the answers

What is the term for the spread of current and voltage change around a depolarized section of the membrane?

Propagation of the AP (C) Signup and view all the answers

What is the function of the dendrites in a neuron?

To receive signals from other neurons (A) Signup and view all the answers

What is the result of the passive spread of electrical activity in the membrane?

The initiation of an action potential in adjacent sections (C) Signup and view all the answers

What is the role of the axon constant (A) in the equation for the longitudinal voltage variation?

It is a scaling factor for the transmembrane current (C) Signup and view all the answers

What is the relationship between the rate of accumulation of input and the rate of action potentials in a neuron?

The rate of action potentials is directly proportional to the rate of accumulation of input (B) Signup and view all the answers

What is the equation that describes the longitudinal current change in the axon?

ΔI_i(x) = I_m/Δx (D) Signup and view all the answers

What is the role of subthreshold stimulation in action potential propagation?

It allows for the passive spread of electrical activity (C) Signup and view all the answers

What is the equation that describes the relation between the longitudinal voltage variation and the transmembrane voltage?

v_i(x) = V/(ri + re) (B) Signup and view all the answers

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