Physiology Quiz - How many are there in the human body? - Part 2
In order to have a complete understanding of physiological processes, it is often necessary to know gross anatomy as well as microscopic anatomy (i.e., histology). Often, it is important to know the number of a given structure under consideration. For example, a student of physiology should know the number of kidneys, nephrons, adrenal glands, cranial nerves, lungs, alveoli, etc. in the human body. Test your basic knowledge by taking this simple quiz.
(1) Approximately, how many nephrons are there in each human kidney?
(2) Arrival of an action potential at the axon terminal of a motor neuron causes the fusion of acetylcholine-containing synaptic vesicles with the pre-synaptic plasma membrane of the axon terminal. Approximately, how many vesicles fuse with the plasma membrane during this process?
(3) At birth, how many bones are there in the human body?
(4) How many bones are there in the adult human body?
(5) Approximately, how many skeletal muscles are there in the human body?