The pancreas is an example of a(n)

• tissue.

• organ.

• organ system.

• none of the above.

The skin is an example of a(n)

• tissue.

• organ.

• organ system.

• none of the above.

Which of the following is not an example of homeostasis?

• Breathing harder to run up a hill

• Shivering when you are cold

• Sweating when you are exercising

• Drinking water to lose weight

Which part of the brain controls balance, posture, coordination, and fine movements?

• Cerebellum

• Cerebrum

• Brainstem

• Hypothalamus

Why is the surface of the cerebral cortex wrinkled?

• To make the surface of the brain softer, in order to cushion it

• To receive information from other parts of the brain

• To increase the surface area available for information processing

• To control involuntary movements.

What is the function of glial cells?

• send electrical impulses.

• receive electrical impulses.

• support neurons.

• all of the above.

Which neurons carry directions from the central nervous system to muscles or organs?

• Interneurons

• Motor neurons

• Sensory neurons

• All of the above

Which neurons connect neurons to other neurons?

• Interneurons

• Motor neurons

• Sensory neurons

• All of the above

Which of the following statements about neurons is true?

• Neurons maintain a membrane potential across their cell membranes.

• The resting potential is usually negative.

• Neurons fire when the membrane potential reaches threshold.

• All of the above.

What is the function of the myelin sheath?

• It allows a neuron’s signal to be transmitted more quickly.

• It allows neurons to connect to each other.

• It helps sodium channels open.

• All of the above.