The Nervous System, Part 1: Crash Course A&P

The video explores the nervous system's role in controlling bodily functions, emphasizing its importance. It covers the central and peripheral systems, sensory input, integration, and motor output. The roles of glial cells and neurons are discussed, highlighting their structure and function. The video concludes with an application of knowledge using a spider scenario.

What are the three principal functions of the nervous system?

• Motor output, respiration, and sensory input

• Integration, digestion, and respiration

• Sensory input, integration, and motor output

• Sensory input, digestion, and motor output

Which part of the nervous system is responsible for communication with the rest of the body?

• Central nervous system

• Peripheral nervous system

• Endocrine system

• Digestive system

What is the role of astrocytes in the central nervous system?

• They act as immune defense

• They anchor neurons to their blood supply

• They create cerebrospinal fluid

• They produce the myelin sheath

Which type of glial cell is responsible for producing the myelin sheath in the peripheral nervous system?

• Astrocytes

• Microglial cells

• Schwann cells

• Ependymal cells

What is a unique characteristic of neurons compared to other cells?

• They can divide and regenerate

• They have a high metabolic rate

• They are short-lived

• They are constantly renewing

Which type of neuron is most abundant in the human body?

• Multipolar neurons

• Sensory neurons

• Bipolar neurons

• Unipolar neurons

What is the main function of sensory neurons?

• Transmit impulses to muscles

• Transmit impulses between neurons

• Pick up messages from sensory receptors

• Control involuntary actions

In the example of a spider on the knee, what type of neurons are first activated?

• Multipolar neurons

• Bipolar neurons

• Unipolar sensory neurons

• Motor neurons

What role do interneurons play in the nervous system?

• They produce the myelin sheath

• They connect sensory and motor neurons

• They transmit impulses to muscles

• They pick up sensory stimuli

How do neurons communicate with each other?

• By dividing and multiplying

• Through blood circulation

• Through chemical and electrical signals

• By producing hormones