In the diagram, which bone is considered the keystone of the cranial floor?
a) E
b) B
c) G
d) H
e) I
a
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Answer the following statements true (T) or false (F)
1. Testosterone is produced by the seminiferous tubules. 2. Sperm develop in the walls of the seminiferous tubules. 3. The primary spermatocyte contains only 23 chromosomes. 4. The spermatozoa contain only 23 chromosomes. 5. Both the male and female gametes contain only 23 chromosomes.
The adrenal medulla consists of modified postganglionic sympathetic neurons called __________ cells
Fill in the blank(s) with correct word
Increased levels of the hormone ________ will lead to increased levels of calcium ions in the blood
A) thymosin B) calcitonin C) PTH D) aldosterone E) cortisol
Which element of a reflex arc is responsible for receiving and processing sensory information and transferring it to motor neurons?
A) effector organ B) motor neuron C) sensory neuron D) integration center