Q- Which of the following types of sensations is carried to the thalamus by the anterolateral tracts after crossing the spinal cord?
A- Crude touch
B- Fine touch
C- Position
D- Vibrations
A- Crude touch- The anterolateral (spinothalamic) tracts carry pain, temperature, and crude touch after crossing to the opposite side of the spinal cord. Fine touch, vibration, and position sense travel in the dorsal columns, not the anterolateral system.
Q- Gonadotropin-releasing hormones are synthesized by which of the following nuclei of the hypothalamus?
A- Anterior nuclei
B- Arcuate nuclei
C- Dorsomedial nuclei
D- Ventromedial nuclei
B- Arcuate nuclei- Gonadotropin-releasing hormone (GnRH) is synthesized in the arcuate nucleus (and preoptic area) of the hypothalamus before being released into the hypophyseal portal system to stimulate LH and FSH secretion
Q- Which of the following substances is responsible for growth of the prostate at puberty?
A- Dihydrotestosterone
B- Estrogen
C- Progesterone
D- Testosterone
A- Dihydrotestosterone- Dihydrotestosterone (DHT), formed from testosterone by 5-alpha reductase, is the key androgen responsible for prostate growth at puberty as well as development of male external genitalia.