BGYB30H3 Lecture 24 Notes Reproduction and Development 4-Dec 1

2 Pages
Unlock Document

University of Toronto Scarborough
Biological Sciences
Ingrid L.Stefanovic

BGYB30H3 Lecture 24 Notes -estrogen causes secondary sex characteristics such as the development of the breasts and fat distribution in hips and upper thighs -androgens from the adrenal cortex cause hair growth such as armpit, pubic hair -four phases of sexual response -excitement phase involves stimulation of erection reflex in women and men -excitement phase causes N Increased blood flow into the penis through corpus cavernosa and corpus spongiosum N Increased blood flow to the vagina and uterus N Lubrication of vagina and penis -plateau is the sexual intercourse -orgasm is the peak of the plateau phase in which there is ejacuation in men and orgasm in women -orgasm in women is not required for fertilization -orgasm phase causes contractions in the lower pelvic muscles -resolution is where body returns back to homeostasis through decreased blood pressure and respiration rate -in erection reflex, tactile stimuli activate mechanoreceptors, which send info to spinal cord -spinal cord inhibits sympathetic nervous system and activates parasympathetic nervous system -stimulating parasympathetic nervous system causes penile arterioles to dilate to increase blood flow -erotic stimuli (erogenous zones) and thoughts can cause erection reflex through ascending and descending pathways to and from
More Less

Related notes for BIOD27H3

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.