Q: Which equation best represents the direction of impulse transmission in a sensory neuron?

$$\text{Impulse}: \text{Receptor} \rightarrow \text{CNS}$$

Q: Which equation best represents the relationship between the number of axons myelinated by a single oligodendrocyte ($$n) $$and the total myelinated axons ($$A) in $$the CNS?

$$A = n \times \text{number of oligodendrocytes}$$

Question 1

Which of the following best describes the primary function of the nervous system?

Accepted Answer

To receive, integrate, and respond to information via electrical and chemical signals

Question 2

A patient suffers damage to the spinal cord. Which division of the nervous system is directly affected?

Accepted Answer

Central nervous system (CNS)

Question 3

Which neuroglial cell is most abundant in the CNS and plays a role in maintaining the blood-brain barrier?

Accepted Answer

Astrocytes

Question 4

Which cell type is responsible for myelinating axons in the peripheral nervous system?

Accepted Answer

Schwann cells

Question 5

A neuron with one axon and multiple dendrites is classified as:

Accepted Answer

Multipolar

Question 6

Which functional class of neurons is most abundant in the CNS and is involved in integration?

Accepted Answer

Interneurons

Question 7

Which of the following is TRUE regarding the myelin sheath in the CNS?

Accepted Answer

Each oligodendrocyte can myelinate multiple axons

Question 8

Which division of the autonomic nervous system is responsible for mobilizing body systems during activity?

Accepted Answer

Sympathetic division

Question 9

If a person’s heart rate decreases and digestion increases, which division of the nervous system is most active?

Accepted Answer

Parasympathetic division

Question 10

Which of the following best describes the function of microglia in the CNS?

Accepted Answer

Act as phagocytic cells that remove debris and pathogens

Question 11

A nerve impulse travels from the eye to the brain. Which type of neuron is involved?

Accepted Answer

Sensory (afferent) neuron

Question 12

Which equation best represents the speed increase of nerve impulse transmission due to myelination?

Accepted Answer

$$v_{myelinated} \u003e v_{unmyelinated}$$

Question 13

Which of the following is a structural feature unique to neurons that enhances learning and memory?

Accepted Answer

Dendritic spines

Question 14

Which equation correctly describes the relationship between the number of dendrites ($$n) $$and the connectivity potential ($$C) of a $$neuron?

Accepted Answer

$$C \propto n$$

Question 15

Which neuroglial cell in the PNS is vital for regeneration of damaged nerve fibers?

Accepted Answer

Schwann cells

Question 16

A neuron receives a signal from the skin and transmits it to the spinal cord. What is the structural classification of this neuron?

Accepted Answer

Unipolar

Question 17

Which of the following is NOT a function of the nervous system?

Accepted Answer

Hormone production

Question 18

Which equation best represents the direction of impulse transmission in a sensory neuron?

Accepted Answer

$$	ext{Impulse}: 	ext{Receptor} ightarrow 	ext{CNS}$$

Question 19

Which of the following best explains why non-myelinated axons conduct impulses more slowly?

Accepted Answer

They do not have an insulating layer to prevent ion leakage

Question 20

Which equation best represents the relationship between the number of axons myelinated by a single oligodendrocyte ($$n) $$and the total myelinated axons ($$A) in $$the CNS?

Accepted Answer

$$A = n 	imes 	ext{number of oligodendrocytes}$$

E2 Lecture 3: Nervous System Pt. 1

Guida di studio - Domande di pratica

Study guide - Flashcard