Nervous and Endocrine Systems

How the nervous system controls physiological processes and how hormones keep the body in balance.

10 questions, free, marked as you go with a worked explanation on every one.

What this covers

• nerve impulse transmission

The questions

1. What is the correct order in which a nerve impulse travels through a neuron?
2. What maintains the resting membrane potential of about −70 mV in a neuron?
3. What happens during depolarisation of a neuron?
4. What is the function of the myelin sheath?
5. Which statements about the endocrine system are correct? Select all that apply.
6. Blood glucose rises after a meal. Which hormone is released, and what does it do?
7. What is negative feedback in a hormonal system?
8. Which gland is often called the master gland because it regulates several others?
9. A nerve impulse travels along a myelinated sensory neuron in the leg at about 50 m/s, which is typical for a peripheral nerve. The distance from a sensor in the toe to the spinal cord is about 1.2 m. How many milliseconds does the impulse take to travel that distance?
10. Use the table. Which type of fibre carries a nerve impulse faster?

Answer these free