A synaptic cleft can be found between _______
A) a neuron and a muscle
B) a neuron and a gland
C) a neuron and another neuron
D) a neuron and another neuron, a neuron and a muscle, as well as a neuron and a gland
Answer: D) a neuron and another neuron, a neuron and a muscle, as well as a neuron and a gland
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One function of a liver cell (hepatocyte) is to detoxify our blood. Which of the following organelles would you expect to see in a high quantity in these hepatocytes?
A) Lysosomes B) Peroxisomes C) Mitochondria D) Rough endoplasmic reticulum
Which statement about peripheral chemoreceptors is incorrect?
a. They are stimulated whenever the arterial falls below normal. b. They are stimulated by a rise in arterial . c. They are stimulated by an increase in arterial H+. d. They are located in the carotid arteries and in the aortic arch. e. When stimulated, they reflexively increase ventilation.
Which of the following does not occur during the micturition reflex in a baby?
a. the motor neuron supplying the external sphincter is stimulated. b. the parasympathetic nerve supply to the bladder is stimulated. c. the internal urethral sphincter mechanically opens due to changes in the shape of the bladder. d. the external urethral sphincter is relaxed. e. the bladder contracts.
A flu vaccine is needed seasonally to be effective but a polio vaccine is only needed once. The best explanation of this is ________
A) the flu vaccine is substantially weaker than the polio vaccine B) exposure to flu vaccine produces no memory cells from proliferating B-lymphocytes C) the polio virus is substantially weaker than the flu virus D) the flu has several strains that change seasonally