Which of the following are basic building blocks of living beings?

Some species contain only one _____, while others are structured into cooperative groups with hundreds of thousands of cells.

1. Cell    
2. Mitochondria    
3. Golgi body    
4. Membrane    

Most cells have one or more nuclei, as well as other organelles that carry out a variety of tasks.
State true or false?

1. True    
2. False    

Which of the following is tiny in size?

1. Mitochondria    
2. Golgi body    
3. Cell    
4. Membrane    

Which of the following is the smallest structural unit?

1. Cell    
2. Mitochondria    
3. Golgi body    
4. Nucleus    

A ___is defined as a mass of cytoplasm that is externally confined by a cell membrane.

1. Cell    
2. Membrane    
3. Cytoplasm    
4. Mitochondria    

An object falling on your hand is an example of 

1. Chemical signal
2. Pain signal
3. Mechanical signal
4. Electromagnetic signal

Name the circled part.

1. Axon
2. Nucleus
3. Dendrites
4. Cell body

Electromagnetic signals include

1. X - ray
2. UV rays
3. Visible light
4. All of the above

What are encapsulated nerve endings?

1. The dendrites are specialized
2. The dendrites are simple
3. The dendrites are encapsulated
4. They are sense organs

Which of the following activities can be done without the nervous system?

1. Think
2. Walk
3. Breathe
4. None of the above

____________ is the chemical junction between the terminus of one neuron and the dendrites of another neuron.

1. Stimulus
2. Synapse
3. Neurons
4. Interneurons

A tube-like projection that conducts electrical impulse from the cell body to axon terminals is called

1. Axon
2. Cell body
3. Myelin sheath
4. Dendrites

Which of the following is an example of a chemoreceptor?

Identify the type of signal from the picture

1. Chemical signal
2. Pain signal
3. Mechanical signal
4. Electromagnetic signal