Deck 4: Extension: C - the Structure and Electrical Activity of Neurons

Question 1

Which ion form is the most appropriate match for protein anion?

A) Cl^-
B) A^-
C) Na⁺
D) K⁺

Answer 1

A^-

Question 2

Epigenetic mechanisms such as _____ can cause phenotypic plasticity.

A) ncRNA deletion
B) DNA deletion
C) gene methylation and mRNA modification
D) DNA resequencing and mRNA deletion
Answer Key

Answer 2

DNA deletion

Question 3

Tubules are primarily concerned with _____.

A) protein transport
B) degradation of foreign substances
C) providing energy to the cell
D) transcribing base-pair sequences from nuclear DNA

Answer 3

protein transport

Question 4

Which ion form is the most appropriate match for hyperpolarization?

A) Cl^-
B) A^-
C) Na⁺
D) K⁺

Question 5

_____ embedded in the cell membrane act as gates and transportation systems that allow selected substances to pass through the membrane.

A) Ion channels
B) Proteins
C) Lipids
D) Enzymes

Question 6

The _____ carries the message across the synapse.

A) axon
B) dendrite
C) neurotransmitter
D) mRNA

Question 7

Membrane pumps exchange Na⁺ ions for _____ ions.

A) Ca²⁺
B) K⁺
C) Cl^-
D) H²⁺

Question 8

The phrase "Halle Berry neurons" refers to _____.

A) the most attractive neurons in the brain
B) the neurons responsible for identifying people
C) the neurons that are the last to break down with old age
D) the implication that people have separate neurons for detecting and representing every object

Question 9

The flow of information through a neuron _____.

A) starts with the dendrites and ends with the terminal button
B) starts with the axon and ends with the dendrites
C) starts with the terminal button and ends with the dendrites
D) starts with the dendrites and ends with the axon

Question 10

The nucleus _____.

A) regulates the materials that enter and leave the cell domain
B) is where the cell's protein products are assembled
C) is where the cell's protein blueprints are stored and copied
D) is an extension of the nuclear membrane

Question 11

The resting charge in neurons is about _____.

A) +60 mV relative to the outside
B) -70 mV relative to the inside
C) +30 mV relative to the inside
D) -70 mV relative to the outside

Question 12

Which ion form is the most appropriate match for potassium ion?

A) Cl^-
B) A^-
C) Na⁺
D) K⁺

Question 13

Which ion form is the most appropriate match for depolarization?

A) Cl^-
B) A^-
C) Na⁺
D) K⁺

Question 14

The "power plants" of the cell, which provide most of the energy for cell functions, are the _____.

A) Golgi bodies
B) endoplasmic reticula
C) mitochondria
D) lysosomes

Question 15

A _____ is a segment of a DNA strand that encodes the synthesis of a particular type of protein molecule.

A) chromosome
B) gene
C) double helix
D) ribosome