Chapter 27 (Male)

This is the period from onset of pituitary gonadotropin secretion to first ejaculation of sperm

Puberty

This is the period including puberty and extending to when a person attains full adult height

Adolescence

These are the androgens responsible for changes during adolescence (2)

(1) Testosterone

(2) Dihydrotestosterone

These are the main effects of testosterone during adolescence (4)

(1) Enlargement of reproductive organs

(2) Production of sperm

(3) Burst of growth

(4) Activation of the libido (Sex drive)

This is the main function of dihydrotestosterone

Stimulates growth of pubic, axillary, and facial hair

During puberty, Gonadotropin releasing hormone travels to the ___________ to stimulate the ____________ cells

Anterior pituitary, gonadotropin cells

The gonadotropin cells within the anterior pituitary produce these two hormones

(1) Follicle stimulating hormone

(2) Luteinizing hormone

This is the main function of Luteinizing hormone

Stimulate interstitial cells to produce testosterone

This is the main function of follicle stimulating hormone

Stimulates nursing cells of the testes to secrete androgen binding sites

This is the main function of the androgen binding sites

Binds and accumulates testosterone within the seminiferous tubules and epididymis

Nurse cells within the testes produce this hormone which regulates the production of follicle stimulating hormone (Regulates sperm production)

Inhibin

These are the negative feedback effects testosterone has on the pituitary gland (2)

(1) Decreases production of GnRH

(2) Decarese pituitary glands sensitivity to GnRH

True or False : As a man ages the testes become less responsive to the pituitary gonadotropins (Resulting in the production of less testosterone)

True

This is why luteinizing and follicle stimulating hormone levels rise in older men

There is less negative feedback inhibition

True or False : The elevated levels of luteinizing and follicle stimulating hormone combined with low testosterone levels makes men really happy and fun to be around

False

These terms refer to sexual intercourse (3)

(1) Coitus

(2) Coition

(3) Copulation

These are the four stages of sexual intercourse

(1) Excitement

(2) Plateau

(3) Orgasim

(4) Resolution

The _______ artery gives rise to the internal ________ artery which enters the root of the penis and branches into two different arteries.

Iliac, pudendal

The internal pudendal branches into these two arteries within the penis

(1) Dorsal

(2) Deep

This artery within the penis supplies blood to the skin, fascia, and corpus spongiosum

Dorsal artery

The _______ artery travels through the core of the corpus cavernosum and splits into _______ arteries which empty into cavernous spaces

Deep, Helicine

This vessel supplies most of the blood when the penis is flaccid

Doral artery

This vein drains the blood from the penis

Median dorsal vein

The ________ and _________ have an abundance of tactile, pressure, and temperature receptors

Glans, preduce

The receptors of the penis lead by way of a pair of _______ of penis to the ________ then lead to the _________ in the spinal cord

Dorsal nerves, Internal pudendal nerves, Sacral plexus

______________ help induce erection in response to input from special senses and sexual thoughts

Sympathetic fibers

_____________ induce an erection in response to direct stimulation of the penis

Parasympathetic fibers

The excitement phase or male sexual response is characterized by these factors (3)

(1) Vasocongestion

(2) Myotonia

(3) Increased heart rate, blood pressure, and pulmonary ventilation

This refers to the genitals swelling with blood

Vasocongestion

This refers to muscle tension

Myotonia

The bulbourethral glands secrete this during the excitement phase

Preejactulate fluid

Erection if an autonomic reaction that is mainly mediated by these fibers

Parasympathetic fibers

Parasympathetic fibers release this substance which dilates the deep arteries and relaxes corpus cavernosum (Causes erection)

Nitric oxide

This term refers to entry into the vagina

Intromission

This phase occurs as respiratory rate, heart rate, and blood pressure stay increased a few seconds or a few minutes before orgasm

Plateau phase

These are the two phases of ejaculation

(1) Emission

(2) Ejection

This phase of ejactulation occurs when the sympathetic nervous system stimulates peristalsis which propels sperm through ducts as glandular secretions are added

Emission

This phase of ejactulation occur when semen in the urethra activates somatic and sympathetic reflexes that stimulate muscular contractions that lead to expulsion

Ejection

During expulsion the ________________ constricts the internal urethral sphincter so urine cannot enter urethra and semen cannot enter bladder

Sympathetic reflex

_____________ constrict the internal pudendal artery and reduce blood flow to penis during the ____________ phase of male sexual response.

Sympathetic signals, resolution

This term refers to the penis becoming soft and flaccid

Detumescence

Nitric oxide triggers the enzyme _____________ which produces ____________ which then relaxes the deep arteries and corpus cavernosum of the penis

Guanylate cyclase, Cyclic guanosine monophosphate (cGMP)

An erection subsides when cyclic guanosine monophosphate is broken down by the enzyme _______________.

Phosphodiesterase type 5

These are three Phosphodiesterase inhibitors

(1) Viagra

(2) Levitra

(3) Cialis

True or false : STD have incubation period where pathogen multiplies without symptoms

True

During the ________________, the disease can be transmitted to others, even in the absence of symptoms

Communicable period

These are the three bacterial STDs

(1) Gonorrhea

(2) Chlamydia

(3) Syphilis

These are the three viral STDs

(1) Genital herpes

(2) Genital warts

(3) Hepatitis

This STD results in pain and pus discharge; may result in sterility from pelvic inflammatory disease (PID)

Gonorrhea

This STD may cause urethral discharge and testicular pain

Chlamydia

Most common causative agent of nongonococcal urethritis (NGU)

Chlamydia

This STD is characterized by hard lesions (chancres) at site of infection

Syphilis

This stage of syphilis is characterized by the disappearance of chancres

First stage

This stage of syphilis is characterized by a widespread pink rash

Second stage

This stage of syphilis is characterized by cardiovascular damage and brain lesions

Third stage

This is the most common most common STD in United States

Genital herpes

This viral STD causes inflammatory liver disease

Hepatitis B and C