Regulatory Systems (Endocrine and Nervous)

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

The junction between neurons is termed a:

• synaptic knob.

• synaptic cleft.

• synapse.

• neurotransmitter.

Which of the following describes homeostasis?

• keeps variables exactly at the set point

• organism's ability to maintain steady(stable) internal conditions

• acts to keep values outside of a desired range

• operates through positive feedback

Blood carries hormones throughout the body. What two body systems are at work here?

• circulatory and endocrine

• endocrine and nervous

• excretory and integumentary

• circulatory and respiratory

A hormone is

• a chemical substance produced by a gland and carried by the lymph.

• an enzyme produced by a gland and carried by the blood.

• a chemical substance produced by an organ and carried by the blood.

• a chemical substance produced by a gland and carried by the blood.

Which statement best describes the function of the nervous system in the body?  

• to protect other organs and tissues
•  send messages to body parts using only chemicals
• to gather information through the senses (stimuli) and also control all other body systems
• to transport oxygen and carbon dioxide

 Which statement best describes the interactions between the nervous system and the bicep – which is a skeletal muscle in the arm?  

• the nervous system sends chemical messages to the bicep so that it makes new cells
• the nervous system sends electrical signals “telling” the bicep cells to contract
• the nervous system provides an attachment point for the bicep
• the nervous system supplies the oxygen to the bicep cells

Which of the following is the nervous system’s main control center?  

• the brain
• the peripheral nerve
• the neuron
• the spinal cord, which is made up of peripheral nerves

The nervous system sends electrical messages.  What type of message does the endocrine  system send?  

• electrical
• fluid
• chemical
• repetitive signal

Only one of the following statements is true.  Analyze the statements to determine which is completely true about how the endocrine system and cardiovascular system work together. 

• The endocrine system uses glands to produce hormones that travel with the blood through the blood vessels.
• The endocrine system uses glands to produce electrical signals that travel through the blood vessels.
• The endocrine system uses nerve cells to control all other systems including the cardiovascular system and the beating of the heart.
• The endocrine system uses white blood cells to kill diseases that might infect the body.