Homeostasis is defined as:

• The process of maintaining a stable internal environment

• The process of maintaining a stable environment

• Keeping your temperature at a set point

• Receptors sensing changes in your body

Tags

NGSS.HS-LS1-3

What is a receptor?

• Receptors are located in the skin

• Receptors carry messages to the hypothalamus

• A receptor receives messages and causes a response

• Receptors or sensors detect changes in the body

Tags

NGSS.MS-LS1-8

When CO2 levels become too high in our blood, we begin to breathe faster. In this example, our diaphragm and intercostal muscles are

• the stimuli

• the response

• the effectors

• the neurons

Tags

NGSS.HS-LS1-3

NGSS.HS-LS1-7

The nucleus of a neuron is found in the

• synapse

• myelin sheath

• dendrite

• cell body

Impulses only travel in one direction in a neuron. What direction do they travel?

• From the dendrite to the axon terminals

• From the axon terminals to the dendrite

• From the cell body to the dendrite

• From the axon to the myelin sheath

What way do impulses travel across synapses?

• From axon terminal to dendrite

• From dendrite to axon terminal

What do sensory neurons do?

• Transmit impulses from sense receptors to motor neurons

• Transmit impulses from sense receptors to the brain and spinal cord

• Transmit impulses from the brain and spinal cord to effectors

• Transmit impulses from muscles to the brain

What do motor neurons do?

• Transmit impulses from the receptors to the brain and spinal cord

• Transmit impulses from brain and spinal cord to muscles

• Transmit impulses from the effector cells to the sensory neurons

• Transmit impulses from the brain and the spinal cord to the effector cells

A bundle of axons is called a

• Neuron

• Nerve

• Synapses

• Nerve cell

Tags

NGSS.MS-LS1-3

Look at the picture. In this scenario: name the stimulus, the receptor, the effector and the response.

• Stimulus = fire

  Receptor = hand

  Effector = skin

  Response = move hand away.

• Stimulus = hot pan

  Receptor = skin

  Effector = muscles in arm and hand

  Response = move hand away

• Stimulus = fire

  Receptor = fingers

  Effector = muscles in arm and hand

  Response = move hand away

• Stimulus = hot pan

  Receptor = skin

  Effector = muscles in arm and hand

  Response = clench hand tighter

Tags

NGSS.MS-LS1-8