The corticospinal system is often referred to as the
A) red nucleus.
B) reticular formation.
C) spinothalamic tracts.
D) pyramidal system.
E) medullary centers.
Answer: D
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Which statement is true regarding atomic structure and function?
A) Electrons and protons comprise the nucleus of the atom. B) An atom is electrically neutral, having the same number of positively charged protons and negatively charged electrons. C) Neutrons are found in orbits around the atomic nucleus. D) The charge of an atom depends on where the protons and electrons are located. E) All shells around the nucleus optimally contain 8 electrons.
Which of the following is not correct pertaining to olfaction?
A) The central processes of the olfactory receptor neurons pass through foramina in the cribriform plate. B) The central processes of the right and left olfactory receptor neurons each collectively form the right and left olfactory nerve. C) The olfactory nerves terminate in the olfactory bulb, which is in contact with the orbital surface of the frontal lobe of the brain. D) The axons of secondary olfactory neurons form the olfactory tract. E) The olfactory tract terminates in the medulla.
Why doesn’t semen enter the urinary bladder during ejaculation?
A) There is no common duct between the reproductive system and the urinary system. B) There is no urge to urinate during sexual intercourse because of the suppression of LH by testosterone buildup in the blood. C) The smooth muscle sphincter at the base of the urinary bladder closes. D) Ejaculation is a parasympathetic reflex resulting in no response by urinary contraction muscles.
All epithelia have two surfaces, an apical surface and a basal surface, that differ in both structure and function. This property is called polarity.
Indicate whether the statement is true or false