Which is not true about spermatogenesis?
A. Mature spermatozoa are haploid (n=23).
B. The process takes place in the walls of the seminiferous tubules.
C. Spermatogenesis begins at birth and continues throughout a man's life.
D. The final stage of the process is called spermiogenesis.
E. The process includes two meiotic divisions.
Answer: C
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Match the term with its correct definition.Epidural space
A. Separates dura mater from periosteum B. The middle meninx C. Most superficial and thickest meninx D. Functional unit of the nervous system E. The meninx bound tightly to brain and spinal cord
Which is TRUE about information from the vestibular system?
A. It is conveyed in the form of action potentials in the optic nerve. B. It is conveyed to nerves that control eye movements. C. It does not reach the level of conscious perception. D. It is primarily conveyed to the cortex of the occipital lobe of the brain. E. It is interpreted as sound in the temporal lobes of the brain.
Common second messengers include cAMP, acetylcholine, and calcium ions
Indicate whether the statement is true or false
Which of the following activities occurs in the presence of light within the phototransduction pathway?
a. Ganglion cells stimulate bipolar cells. b. cGMP levels increase within photoreceptors. c. Bipolar cells produce graded potentials. d. Sodium channels open in photoreceptors. e. None of the above.