Khan Academy Highlights

Question 1

What is the process of mitosis?

Answer 1

Mitosis is a type of cell division in which one cell (the mother) divides to produce two new cells (the daughters) that are genetically identical to itself. In the context of the cell cycle, mitosis is the part of the division process in which the DNA of the cell’s nucleus is split into two equal sets of chromosomes.

Question 2

True or False- mitosis consists of four phases: prophase, metaphase, anaphase, and telophase?

Answer 2

True!

Question 3

True or False- The peripheral nervous system (PNS), which consists of the neurons and parts of neurons found outside of the central nervous system (CNS), includes sensory neurons and motor neurons. Sensory neurons bring signals into the CNS, and motor neurons carry signals out of the CNS.

Answer 3

True!

Question 4

What does the central nervous system (CNS) consist of?

Answer 4

Brain and spinal cord. It is in the CNS that all of the analysis of information takes place.

Question 5

What best describes why cardiac muscle is a tissue?
A. Cardiac muscle tissue is made up of muscle cells, which are a type of specialized cell.

B. The cells in cardiac muscle tissue work together to help the heart muscle contract.

Answer 5

Both answers!

Question 6

A cell’s complete set of DNA is called…

Answer 6

a genome.

Question 7

How many chromosomes do we have in a human body? (clue: there are X pairs of 23)

Answer 7

46

Question 8

True or False- There are two stages of cell cycle: Interphase and mitotic phase?

Answer 8

True!