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Think of DNA like 2 long shoelaces coiled around each other to form a spiral - or a double helix as it's called. Each of the 2 shoelaces is called a 'strand' and is made up of something called 'polynucleo...

Students must select 1 of the following:

a) Motor - Sensory - Relay b) Effector - Relay - Motor c) Sensory - Relay - Motor d) Relay - Motor - Sensory

The correct answer is C.

When a s...

At rest a nerve cell or fiber has more sodium (NA+) ions in the extracellular fluid and more potassium (K+) ions in the intracellular fluid. There are both NA+ and K+ ion channels in the membrane of the n...

Of course. Spermatogenesis takes place in the seminiferous tubules of the testis. The germinal epithelium cells, which are in the wall of the seminiferous tubule, first differentiate into diploid spermato...

Synapses are junctions between nerves. They allow information (impulses) to be transferred from one nerve to the next. The first nerve conducts an electrical impulse across its length, which causes it to ...