Carbon dioxide is transported through the blood by 3 mechanisms. What are those 3 mechanisms? (Select all that apply)

A. Maintaining the uterine lining for potential pregnancy: Progesterone is produced by the corpus luteum after ovulation and prepares/maintains the endometrium for implantation and early pregnancy.
B. Promoting sperm production: Sperm production is a male function driven by FSH and testosterone; progesterone does not promote spermatogenesis.
C. Inducing uterine contractions: Progesterone actually inhibits uterine contractions to help maintain pregnancy; oxytocin and prostaglandins promote contractions.
D. Enhancing follicle development: Follicle development is primarily stimulated by FSH and estrogen during the follicular phase; progesterone is dominant after ovulation and does not enhance follicle development.

A. Muscularis:The muscularis is the smooth muscle layer responsible for peristalsis/segmentation; it contains muscle, not the primary capillary/lymphatic beds for nutrient absorption.
B. Mucosal epithelium: The epithelial layer faces the lumen and absorbs nutrients at the cell surface, but the transport capillaries/lymphatics lie deeper than the epithelium.
C. Serosa: The serosa is the outer connective tissue covering of the gut -it does not contain the nutrient capillaries and lacteals.
D. Lamina propria: The lamina propria (a connective tissue layer within the mucosa) contains blood capillaries and lymphatic lacteals that transport absorbed nutrients.