Identify important regulatory hormones that establish and maintain male sexual function
What will be an ideal response?
Important regulatory hormones that establish and maintain male sexual function are follicle-stimulating hormone (FSH), luteinizing hormone (LH), and gonadotropin-releasing hormone (GnRH). Testosterone is the most important androgen, although some tissues, such as the external genitalia and prostate, are more responsive or sensitive to dihydrotestosterone (DHT).
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A. Mitochondria; microtubules B. Ribosomes; intermediate filaments C. Nucleoli; microfilaments D. Centrioles; microtubules E. Inclusions; centrosomes
Hemolysis may occur when a blood cell is placed into a(n) ________ solution
A) isotonic B) hypertonic C) hypotonic D) merotonic E) homotonic
Some flat and irregular bones of the skull have air-filled spaces called ________.
A. trabeculae B. lacunae C. medullary cavities D. epiphyseal spaces E. sinuses
Which of the following statements is TRUE regarding skeletal-muscle contraction?
A. Only one cross-bridge cycle can occur when the [Ca2+] is elevated in the cytosol; in order to undergo a second cycle, [Ca2+] must be sequestered in the sarcoplasmic reticulum and released again. B. ATP hydrolysis products must be removed from myosin before it can bind to actin. C. Binding of myosin to actin takes place when [Ca2+] increases in the cytosol. D. A single twitch in skeletal muscle lasts the same length of time as the action potential that causes it. E. The powerstroke of the cross-bridge cycle occurs simultaneously with ATP being hydrolyzed into ADP and Pi.