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