Why is sodium actively reabsorbed in the nephron?
A) to make urine less concentrated
B) to increase passive reabsorption of water
C) to decrease blood pressure
D) to decrease osmolarity inside the nephron
B) to increase passive reabsorption of water
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All of the following are true of olfactory pathways except which one?
A) They project first to the occipital lobes and then to the thalamus. B) Neurons from the olfactory epithelium synapse in the olfactory bulb. C) Information flows to the olfactory cortex, hypothalamus, and limbic system. D) They reach the forebrain without first synapsing in the thalamus. E) The limbic system-olfactory pathway connection means that there are close ties between experiences and memories with smell.
Which of the following is a secondary sex organ?
A. Vagina B. Testis C. Ovary D. Facial hair E. Distribution of body fat
What prevents oxygen-rich blood from mixing with oxygen-poor blood in the heart?
A. The interatrial and interventricular septa B. The fibrous pericardium C. The intercalated discs D. The aortic and pulmonary semilunar valves E. The tricuspid valve
Most hypothalamic and pituitary hormones are:
a. amino acids b. peptides / proteins c. steroids d. eiconsanioids e. catecholamines