Nervous System Functions and Structure

Professor Dave explains the nervous system, focusing on neurons, their structure, and function. He discusses neuron types, membrane potential, and action potential. The video also covers the organization of the central and peripheral nervous systems, highlighting their roles in sensory input and motor output.

What is the primary function of the nervous system?

• To digest food

• To carry signals from the brain to the body

• To produce hormones

• To circulate blood

What is the main type of cell in the nervous system?

• Muscle cell

• Neuron

• Connective cell

• Epithelial cell

What is the role of neuroglia in the nervous system?

• To produce hormones

• To contract muscles

• To protect and support neurons

• To transmit electrical impulses

Which type of neuron has a single axon that divides into two branches?

• Multipolar neuron

• Sensory neuron

• Bipolar neuron

• Unipolar neuron

What is the function of motor neurons?

• To transmit signals to the central nervous system

• To transmit signals from the central nervous system to muscles and glands

• To receive sensory input

• To support neurons

What is membrane potential?

• The ability of a neuron to divide

• The number of neurons in the brain

• The difference in charge across a cell membrane

• The speed of nerve impulse transmission

What happens when a neuron reaches the threshold potential?

• The neuron dies

• The neuron becomes inactive

• The neuron divides

• An action potential is generated

What is the role of the central nervous system?

• To circulate blood

• To digest food

• To produce hormones

• To integrate sensory information and determine motor output

Which division of the peripheral nervous system sends signals to skeletal muscles?

• Parasympathetic division

• Somatic nervous system

• Sympathetic division

• Autonomic nervous system

What is the function of the parasympathetic division?

• To stimulate muscle contraction

• To increase heart rate

• To produce neurotransmitters

• To decrease heart rate and promote rest