Nervous system

The main function of the nervous system is .

• to inhale oxygen and exhale carbon

• to break down food consumed by a pe

• to control the body's activities by receiving and responding to information

• to control the body's movements

Answer explanation

The correct answer is 'to control the body's activities by' because the nervous system regulates and coordinates all bodily functions, including movements, responses to stimuli, and maintaining homeostasis.

What are the two MAJOR divisions of the nervous system?

• Central and Lower nervous systems

• Central and Peripheral nervous systems

• Lower and Cerebral nervous systems

• Central and Muscular nervous systems

Answer explanation

The two major divisions of the nervous system are the Central nervous system, which includes the brain and spinal cord, and the Peripheral nervous system, which connects the CNS to the rest of the body.

What are the three components of the nervous system? (a)  

• brain, spinal cord, nerves

• brain, lungs, spinal cord

• heart, brain, nerves

• brain, nerves, neurons

Answer explanation

The three components of the nervous system are the brain, spinal cord, and nerves. These elements work together to transmit signals throughout the body, making the correct choice 'brain, spinal cord, nerves'.

A nerve cell is called a:

• neutron

• nerve

• neuron

• synapse

Answer explanation

A nerve cell is called a neuron. Neurons are specialized cells that transmit nerve impulses, while the other options (neutron, nerve, synapse) refer to different concepts in biology and physics.

The space between an axon of a neuron that is communicating with a dendrite of another neuron is called a ________________.

• Neuron

• Brain message

• Stimulus

• Synapse

Answer explanation

The space between an axon and a dendrite is called a synapse. This is where neurotransmitters are released to transmit signals between neurons, making 'synapse' the correct answer.

Senses recognize ____________ which are recognized by the brain and results in a response.

• Synapses

• Brain messages

• Stimuli (plural of stimulus)

• Cerebrums

Answer explanation

Senses recognize stimuli, which are external factors that trigger responses in the brain. The term 'stimuli' is the correct choice as it refers to the various inputs that our senses detect.

Tags

NGSS.MS-LS1-8

When the spinal cord responds in an emergency to a stimulus before the brain, this is called a...

• response

• synapse

• cerebral response

• reflex

Answer explanation

When the spinal cord reacts to a stimulus before the brain, it is known as a reflex. This rapid response bypasses the brain to ensure quick action, making 'reflex' the correct answer.

Which of the following is NOT a sense?

• hearing

• nose

• smell

• touch

Answer explanation

The correct answer is 'nose' because it is not a sense itself. Hearing, smell, and touch are all recognized senses, while the nose is an organ used for the sense of smell.

Consists of your brain and spinal cord

• medulla

• cerebrum

• central nervous system

• peripheral nervous system

Answer explanation

The central nervous system (CNS) consists of the brain and spinal cord, making it the correct answer. The medulla and cerebrum are parts of the CNS, while the peripheral nervous system includes nerves outside the CNS.

All parts of the nervous system except for the brain and spinal cord

• nerves

• neuron

• central nervous system

• peripheral nervous system

Answer explanation

The correct answer is the peripheral nervous system, which includes all parts of the nervous system outside the brain and spinal cord. The central nervous system consists of the brain and spinal cord only.