Answer to Question 1
Seminoma: a type of a malignant tumor of the testis
Teratoma: malignant tumor comprised of several different types of malignant tissue
Embryonal cancer: malignant cells resemble rapidly growing trophoblastic tissue
Choriocarcinoma: malignant proliferation of trophoblastic tissue
Answer to Question 2
1 . Stimulation of the parasympathetic neurons on sexual arousal causes the release of the neurotransmitter nitric oxide.
2 . Nitric oxide diffuses into the smooth muscles, causing the release of cGMP that causes relaxation and dilatation of the smooth muscles of the penile arteries and trabeculae within the corpora cavernosa.
3 . Blood under pressure fills the cavernous bodies.
4 . The increased arterial blood flow and pressure compress the draining veins, preventing the outflow of blood and causing the penis to become rigid and erect.
5 . cGMP is broken down by the phosphodiesterase enzyme.
A comparison between chromosomes found in a normal human cell and a cancer cell from the same person
Relationship between Hox gene number and body complexity in different types of animals.
Examples of objective evaluation
Examples of Sleep Disorders
Three Main Types of Tectonic Plates Boundaries
Types of Mutations in the HBB Gene That Cause p-Thalassemia