CH 1.1 Review Questions

Question 1

Santiago Ramón y Cajal was responsible for which of these discoveries?

Answer 1

The nervous system is composed of separate cells.

Question 2

Which part of a neuron has its own genes, separate from those of the nucleus?

Answer 2

The Mitochondria

Question 3

What is most distinctive about neurons, compared to other cells?

Answer 3

Their shape

Question 4

Which of these do dendritic spines do?

Answer 4

They increase the surface area available for synapses.

Question 5

What does an efferent axon do?

Answer 5

It carries output from a structure

Question 6

Which of the following is a function of astrocytes?

Answer 6

Astrocytes synchronize activity for a group of neurons.

Question 7

Which of the following is a function of microglia?

Answer 7

Microglia remove dead cells and weak synapses.

Question 8

Which of these can easily cross the blood–brain barrier?

Answer 8

Fat-soluble molecules

Question 9

Which of these chemicals cross the blood–brain barrier by active transport?

Answer 9

Glucose and amino acids

Question 10

What is the brain’s main source of fuel?

Answer 10

Glucose

Question 11

For the brain to use its main source of fuel, what does it also need?

Answer 11

Thiamine