Which of the following chemicals does not have a positive chronotropic effect?
A. Caffeine
B. Thyroid hormone
C. Epinephrine
D. Potassium
Answer: D
You might also like to view...
Which of the following occurs during an erection?
A) The veins of the corpora cavernosa dilate. B) The parasympathetic nervous system dilates the arteries going into the penis. C) Blood fills the corpora spongiosum, causing it to engorge. D) The sympathetic nervous system constricts the veins leaving the penis.
Steroid hormones diffuse through cell membranes, then bind with receptors, whereas
nonsteroid hormones bind receptors on the target cell membrane. Indicate whether the statement is true or false
LH stimulates which cells to synthesize androgens?
a. sperm b. spermatogonia c. theca d. granulosa e. Sertoli
What spinal nerve tract carries information regarding pain and temperature?
A) Corticospinal B) Spinocerebellar C) Reticulospinal D) Lateral spinothalamic