Cardiovascular — Flashcards

Flashcard 641: What visual deficit results from complete lesion of the optic nerve (e.g. central retinal artery occlusion, central retinal vein occlusion)? _____

Answer: Ipsilateral anopia

Flashcard 642: Which EEG waveform is characteristic of Stage N1 sleep and also seen in Stage N2?

Answer: Theta

Flashcard 643: Meissner corpuscles adapt _____

Answer: quickly

Flashcard 644: _____ (blood or bile) flows from the central vein towards the portal triad

Answer: Bile

Flashcard 645: Extraocular movements during REM sleep are due to activity of the _____

Answer: paramedian pontine reticular formation (PPRF)

Flashcard 646: Which primary lymphoid organ is the site for immune cell production? (Bonus: What is the survival signal?)

Answer: Bone marrow Bonus: IL-7

Extra: Primary lymphoid organs (bone marrow and thymus) are the sites where lymphocytes are produced and undergo maturation. 1. **Bone marrow**: The site of hematopoiesis (production of all immune cells) and the site of B-cell maturation. 2. **Thymus**: The site of T-cell maturation (T-cells are produced in the bone marrow but migrate to the thymus). 3. **IL-7**: A critical cytokine produced by stromal cells in the primary lymphoid organs that acts as a survival and proliferation signal for lymphoid progenitors.

Flashcard 647: Why are left-sided valvular lesions not seen in a patient with carcinoid heart disease?_____

Answer: blood passes through the lung, which contains MAO, thus converting 5-HT to 5-HIAA before reaching the left heart

Flashcard 648: What non-nucleated cell expresses MHC class I? _____

Answer: Platelets

Flashcard 649: Scurvy (vitamin C deficiency) is associated with poor _____ healing

Answer: wound

Flashcard 650: What form of thyroid hormone is predominately produced by the thyroid gland?_____

Answer: 90% T4