Exam 1 Chapter 3

Penile bulb

At the end of the penis (closest to the male's body), the corpus spongiosum forms a rounded mass of erectile tissue

Penile Disorders

Balanitis - swollen glans as a result of infection Phimosis - foreskin cannot be retracted over glans Paraphimosis- foreskin is trapped behind corona and cant be pulled back over the glans Peyronie's disease - unnatural curvature of the penis usually due to scar tissue

Spermatic cord

Each testicle connects to important internal organs via a loose bundle of structures

On its own, seminal fluid contains which of the following?

Fructose and Prostaglandins

Foreskin

In an uncircumcised penis, the glans is at least partially covered by a loose fold of skin

Which of the following is not true about fluid from the bulbourethral gland?

It always contains sperm. It is incapable of causing pregnancy. It is released immediately after ejaculation.

Which of the following is false regarding prostatic cancer?

It mostly affects males in their 20s and 30s.

Frenulum

On the underside of the penis, the corona moves in closer to the tip of the penis, creating a strip of looser skin

Which of the following statements about the testicles is false?

Once sperm have matured sufficiently to reach the lumen, they are fully mobile

Which of the following is not considered to be an accessory sexual structure in the male body?

Penis

The prostate gland releases fluid that:

Prevents semen from coagulating.

Place the following components of ejaculation in their proper sequence.

Sperm travels up from the base of the vas deferens Sperm are pushed around the top of the bladder Sperm are mixed with seminal fluid in the ejaculatory ducts Sperm is mixed with fluid from prostate gland Semen is emitted through the urethra and out of the penis

Which is true of the corona and frenulum?

They are the most erotically sensitive part of the penis.

Surrounding the top of the head of a sperm is a(n) ______ , which facilitates fertilization of an ovum by containing various enzymes and receptor sites.

acrosome

Ischiocavernosus muscle

affects the angle of a male's erection and allows for voluntary movement of the penis when it is erect

Priapism

an erection sustained for a long period in the absence of stimulation, can cause damage because the tissue in the penis has no blood flow

Bulbospongiosus and Pubococcygeu muscles

are involved in the process of orgasm and ejaculation

During ejaculation, a sphincter in the _____ closes off to prevent the backflow of semen, forcing it to exit the male's body.

bladder

Vas deferens

carries mature sperm up from the testicles

Varicocele

causes the veins in the testicles to swell and feel like "a bag of worms"

The ______ muscle is responsible for lowering and raising the testicles in order to keep them at the right temperature for producing sperm.

cremaster

Disadvantages of circumcision

decreases sexual sensitivity it's linked with more pain for female sexual partners

The video suggests that in terms of the overall reproductive system, the penis is relatively unimportant. The narrator states that it is merely a(n):

delivery system

Corpous spongiosum

enlarges during erection

The midpiece of the sperm is located at the top of the ______ , near the head of the sperm.

flagellum

Circumsision

foreskin is removed historically a religious practice

The concentrated nerve endings near the surface of the penis that are highly sensitive to tactile stimulation are called:

genital end-bulbs

Testicles

housed in the scrotum produces sperm and hormones

Orchitis

inflammation of the testicle that frequently co-occurs with epididymis

Scrotum

is part of the male external genitalia and can be viewed from outside a male's body

Glans

is the head of the penis, resides on top of the penile shaft

Cremaster muscle

is to keep sperm at their ideal temperature

Viagra

is used to treat erectile dysfunction

Testicular Cancer

most common form of cancer in men ages 15-35 first sign is unusual lumps in scrotum

Can a man break his penis?

no but the cavernosa can rupture, which resembles a broken bone

What are "blue balls"?

pain from prolonged arousal caused by swelling of testicles and glands from increased blood flow

_______ is a dangerous condition in which an erection is sustained when there is no stimulation or when stimulation has ended.

priapism

Benefits of circumcision

reduces UTI rates by 50% reduces STI transmission by 10-15% reduces prostate cancer rates by 15%

Corona

rim of tissue circling around the head of the penis

Uethra

runs through the center of the shaft of the penis serves the double function of discharging both semen and urine.

Ejaculation

sperm travels through the seminiferous tract semen provides nutrients and neutralizer acids Cowper's gland releases "pre-ejaculation"

Corpora cavernosa

stiffens during erection

Epididymis

swelling of testicle due to an infection often caused by an STI or other bacteria

Hydrocele

swelling of the testicle due to collection of fluid around the membranes of the testicle

The ______ connects up to the body through the spermatic cord, which is located within the ______ .

vas deferens; inguinal canal