Homeostasis 1.0

The maintenance of a constant internal state within an organism is termed:

• coordination.

• regulatory control.

• homeostasis.

• optimal level.

Which of these is an example of a positive feedback mechanism?

• 
• 

When you are hot, your body sweats to cool you down. This means your temperature went above normal and your body sweats to counteract that change to bring you back to normal. What kind of feedback loop would this be?

• Negative Feedback Loop

• Positive Feedback Loop

• Neutral Feedback Loop

• Opposite Feedback Loop

Conduction of a nerve impulse is:

• faster than that of a hormone and lasts for a longer period.

• faster in axons with a small diamter.

• faster in myelinated neurones.

• faster in longer axons.

The junction between neurons is termed a:

• synaptic knob.

• synaptic cleft.

• synapse.

• neurotransmitter.

Which of the following is a correct representation of the stimulus-response model?

• stimulus - receptor - coordinating system - effector - response

• stimulus - coordinating system - receptor - effector - response

• stimulus - coordinating system - receptor - response

• stimulus - coordinating system - effector - response

The neuron at rest:

• is negatively charged on the outside relative to its cytoplasm.

• has a difference in charge across the membrane due to active transport of Na+ out of the cytoplasm.

• has the same electrical charge on both sides of the cell membrane.

• has a difference in charge across the membrane due to active transport of Na+ into the cytoplasm.

The two types of feedback systems that help organisms maintain homeostasis are:

• positive and negative 
• receptor and effector
• static and dynamic
• minor and major

Tags

NGSS.HS-LS1-3

The pancreas in this diagram could be seen as what:

• effector

• receptor

• coordinating system

• response

• stimulus

What is the cell structure labelled as 1?

• Dendrite

• Cell Body

• Axon

• Myelin sheath